SYSMAC CPM1/CPM1A/CPM2A/CPM2C/SRM1(–V2). Programmable Controllers (2001)

Analog I/O Units

Section

3-1

For analog outputs it is possible to use both voltage outputs and current outputs

at the same time, but the total current output must not exceed 21 mA.

Note

1. Use 2-core shielded twisted-pair cables.

2. Wire away from power lines (AC power supply wires, power lines, etc.)

3. When an input is not being used, short V IN and I IN to the COM terminal.

4. Use crimp terminals. (Tighten terminals to a torque of 0.5 N⋅m.)

5. When using current inputs, short V IN to I IN.

6. When there is noise in the power supply line, install a noise filter on the input

section and the Power Supply Unit.

Ladder Program

Specifying the Range Code

Specify the I/O signal range by writing the range code to the Analog I/O Unit’s

output word from the ladder program in the first cycle of program execution. The

Analog I/O Unit will start to convert analog I/O values once the range code has

been specified. (Refer to page 166.)

Write the range code to the Analog I/O Unit’s output word in the first cycle of op-

eration; the Analog I/O Unit’s output word is “n+1” when “n” is the last word allo-

cated to the CPU Unit, or previous Expansion Unit or Expansion I/O Unit in the

configuration.

Reading Converted Analog Input Values

A ladder program can be used to read the memory area where the converted

values are stored. Values are output to the next two words (m + 1, m + 2) follow-

ing the last input word (m) allocated to the CPU Unit, or previous Expansion Unit

or Expansion I/O Unit.

(m + 1)

Analog input 1

Analog input 1 conversion value (Hex: 00 to FF)

Open-circuit

Detection Flag

0: Normal

1: Open-circuit

(m + 2)

Analog input 2

Analog input 2 conversion value (Hex: 00 to FF)

Open-circuit

Detection Flag

0: Normal

1: Open-circuit

Note The Open-circuit Detection Flag is turned ON when the input signal range is set

to 1 to 5 V or 4 to 20 mA and the input signal falls below 1 V or 4 mA. (Open cir-

cuits are not detected when the input signal range is set to 0 to 10 V.)

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Writing Analog Output Set Values

A ladder program can be used to write data to the output word where the set val-

ue is stored. The output word will be “n+1” when “n” is the last output word allo-

cated to the CPU Unit, or previous Expansion Unit or Expansion I/O Unit.

(n + 1)

Sign bit

(Used when the output sig-

Set value (Hex: 00 to FF)

nal range is -10 to 10 V.)

1, 2, 3...

1. The set value range is 0000 to 00FF when the output signal range is 0 to

10 V/4 to 20 mA.

2. The set value range is divided into two parts: 80FF to 8000 (-10 to 0 V) and

0000 to 00FF (0 to 10 V) when the output signal range is -10 to 10 V.

Startup Operation

After power is turned ON, it will require two cycle times plus approx. 100 ms be-

fore the first data is converted. The following instructions can be placed at the

beginning of the program to delay reading converted data from analog inputs

until conversion is actually possible.

Note Analog input data will be 0000 until initial processing has been completed. Ana-

log output data will be 0 V or 0 mA until the range code has been written. After the

range code has been written, the analog output data will be 0 V or 4 mA if the

range is 0 to 10 V, -10 to 10 V, or 4 to 20 mA.

SR 25315

(Always ON Flag)

TIM 000

TIM 000 will start as soon as power turns ON.

#0003

After 0.2 to 0.3 s (200 to 300 ms), the Comple-

T005

tion Flag for TIM 000 will turn ON, and the con-

verted data from analog input will be read from

MOV (21)

IR 001 and stored in DM 0000.

001

DM0000

Handling Unit Errors

If an error occurs in an Analog I/O Unit, the Error Flags in AR 0200 to AR 0204 will

be turned ON. The addresses of the Error Flags are in the order that the Expan-

sion Units and Expansion I/O Units are connected in the PC, with AR 0200 used

for the Expansion Unit or Expansion I/O Unit closest to the CPU Unit. Use these

flags in the program when it is necessary to detect errors.

When an error occurs in the Analog I/O Unit, analog input data will be 0000 and

0 V or 4 mA will be output as the analog output.

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Programming Example

This programming example uses these ranges:

Analog input 0: 0 to 10 V

Analog input 1: 1 to 5 V or 4 to 20 mA

Analog output:

0 to 10 V or 4 to 20 mA

25135

(First Cycle ON Flag)

MOV (21)

#FF04

011

25313

Writes the range code (FF04) to the Unit.

(Always ON Flag)

TIM 000

#0003

Execution

TIM000

condition

MOV (21)

001

DM0000

Reads analog input 0’s converted value.

Execution

TIM000

condition

00215

01000

Open-circuit alarm

Execution

TIM000

condition

MOV (21)

002

DM0001

Reads analog input 1’s converted value.

Execution

TIM000

condition

MOV (21)

DM0010

011

The content of DM 0010 is written to the output

word as the analog output set value.

Example

Analog Input Program Example

Analog I/O Unit Connection

In this example, an Analog I/O Unit is connected to a CPU Unit with 30 I/O points.

I/O words are allocated to the Analog I/O Unit beginning with the next word ad-

dress following the last words allocated to the CPU Unit.

IR 000

IR 002

Input words

IR 001

IR 003

CPU Unit with

Analog I/O

30 I/O points

Unit

IR 010

Output words

IR 012

IR 011

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Analog I/O Wiring

Using analog input 1 as a voltage input

Using analog input 2 as a current input

Common (-)

Current input 2 (+)

Voltage input 1 (+)

Common (-)

Using analog output as a voltage output

Common (-)

Voltage output (+)

Analog I/O Settings

Input 1 signal range:

0 to 10 V

Input 2 signal range:

4 to 20 mA

Output signal range:

0 to 10 V

Range Code Setting:

FF04

IR 012

Range code: FF04

Program

25135

(First Cycle ON Flag)

MOV (21)

#FF04

012

25313

Writes the range code (FF04) to the Unit.

(Always ON Flag)

TIM 000

#0003

Execution

TIM000

condition

MOV (21)

002

DM0000

Reads analog input 1’s converted value.

Execution

TIM000

condition

MOV (21)

003

DM0001

Reads analog input 2’s converted value.

Execution

TIM000

condition

MOV (21)

DM0010

012

The content of DM0010 is written to the output

word as the analog output set value.

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3-1-2

CPM1A-MAD11 and CPM2C-MAD11 Analog I/O Units

The following information applies to both the CPM1A-MAD11 and CPM2C-

MAD11 Analog I/O Units unless otherwise specified.

A maximum of 3 Expansion Units or Expansion I/O Units, including up to 3

CPM1A-MAD11 Analog I/O Units, can be connected to a CPM2A or CPM1A.

One Analog I/O Unit allows 2 analog inputs and 1 analog output. With the maxi-

mum of 3 Analog I/O Units connected, 6 analog inputs and 3 analog outputs are

possible.

Possible to connect to a maximum of

3 Units including Expansion I/O Units

CPM1A/CPM2A

CPM1A-20EDR1

CPM1A-8ED

CPM1A-MAD11

CPU Unit

Expansion I/O Unit

Analog I/O Unit

1 analog output

2 analog inputs

A maximum of 5 Expansion Units or Expansion I/O Units, including up to 4

CPM2C-MAD11 Analog I/O Units, can be connected to a CPM2C (A maximum

of 3 Units can be connected to the CPM2C-S). One Analog I/O Unit allows 2 ana-

log inputs and 1 analog output. With the maximum of 4 Analog I/O Units con-

nected, 8 analog inputs and 4 analog outputs are possible.

CPM2C

CPU Unit

CPM2C-MAD11 Analog I/O Units

Expansion I/O Unit

Two analog inputs and one

analog output for each Unit

• The analog input range can be set to 0 to 5 VDC, 1 to 5 VDC, 0 to 10 VDC, -10

to 10 VDC, 0 to 20 mA, or 4 to 20 mA. The inputs have a resolution of 1/6000.

• An open-circuit detection function can be used with the 1 to 5 VDC and 4 to

20 mA settings.

• The analog output range can be set to 1 to 5 VDC, 0 to 10 VDC, -10 to 10 VDC,

0 to 20 mA, or 4 to 20 mA. The outputs have a resolution of 1/6000.

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Analog I/O Units

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Item

Voltage I/O

Current I/O

Analog

Number of inputs

2 inputs (2 words allocated)

Input

Input signal range

0 to 5 VDC, 1 to 5 VDC,

0 to 20 mA or 4 to 20 mA

Section

0 to 10 VDC, or -10 to 10 VDC

Max. rated input

±15 V

±30 mA

External input impedance

1 MΩ min.

250 Ω

Resolution

1/6000 (full scale)

Overall accuracy

25°C

0.3% full scale

0.4% full scale

0 to 55°C

0.6% full scale

0.8% full scale

A/D conversion data

16-bit binary (4-digit hexadecimal)

Full scale for -10 to 10 V: F448 to 0BB8 Hex

Full scale for other ranges: 0000 to 1770 Hex

Averaging function

Supported (Settable for individual inputs via DIP switch)

Open-circuit detection function

Supported

Analog

Number of outputs

1 output (1 word allocated)

Output

Output signal range

1 to 5 VDC, 0 to 10 VDC, or

0 to 20 mA or 4 to 20 mA

Section

–10 to 10 VDC,

Allowable external output load

1 kΩ min.

600 Ω max.

resistance

External output impedance

0.5 Ω max.

---

Resolution

1/6000 (full scale)

Overall accuracy

25°C

0.4% full scale

0 to 55°C

0.8% full scale

Set data (D/A conversion)

16-bit binary (4-digit hexadecimal)

Full scale for -10 to 10 V: F448 to 0BB8 Hex

Full scale for other ranges: 0000 to 1770 Hex

Conversion time

2 ms/point (6 ms/all points)

Isolation method

Photocoupler isolation between analog I/O terminals and internal circuits.

No isolation between analog I/O signals.

CPM1A-MAD11 Part Names

DIP switch

Expansion connector

Expansion I/O connecting cable

Analog I/O terminals

Analog I/O Terminals

Connected to analog I/O devices.

Expansion I/O

Connected to the CPU Unit or previous Expansion Unit. The cable is provided

Connecting Cable

with the Unit and cannot be removed.

Caution Do not touch the cables during operation. Static electricity may cause operating

errors.

Expansion Connector

Connected to the next Expansion Unit or Expansion I/O Unit.

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DIP Switch

Used to enable or disable averaging.

Pin1: Average processing for analog input 0

(OFF: Average processing not performed; ON: Average processing performed)

Pin2: Average processing for analog input 1

(OFF: Average processing not performed; ON: Average processing performed)

CPM2C-MAD11 Part Names

Front

Side

Lock level

Expansion I/O

input connector

Expansion I/O

DIP switch

output connector

Lock level

Analog I/O terminals

Expansion I/O output connector

Expansion I/O input connector

DIP switch

Analog input terminals

Analog output terminals

Analog I/O Terminals

Connected to analog I/O devices.

DIP Switch

Used to specify current or voltage inputs and to enable or disable averaging.

Average processing for analog input 0

(OFF: Average processing not performed; ON: Average processing performed)

Average processing for analog input 1

(OFF: Average processing not performed; ON: Average processing performed)

Input type for analog input 0

(OFF: Voltage input; ON: Current input)

Input type for analog input 1

(OFF: Voltage input; ON: Current input)

Caution Do not touch the DIP switch during operation. Static electricity may cause oper-

ating errors.

Expansion I/O Input

Connected to the expansion I/O output connector on the CPU Unit or previous

Connector

Expansion (I/O) Unit.

Expansion I/O Output

Connected to the expansion I/O input connector on the next Expansion (I/O)

Connector

Unit.

Note

1. A maximum of 5 Expansion (I/O) Units can be connected to the CPU Unit

and the total number of allocated words must be 10 maximum for inputs and

10 maximum for outputs.

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Analog I/O Units

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2. Use the connector cover provided with the CPU Unit to protect the output

connector when it is not used.

Caution Do not touch the cables during operation. Static electricity may cause operating

errors.

Lock Levers

Used to secure the Expansion Unit.

Analog I/O Signal Ranges

Analog I/O signal ranges are digitally converted as described in this section.

Analog Input Signal

The Analog I/O Unit converts analog input data to digital values. The digital val-

Ranges

ues depend on the input signal ranges, as shown in the following diagrams.

When the input exceeds the specified range, the AD converted data will be fixed

at either the lower limit or upper limit.

-10 to 10 V

The -10- to 10-V range corresponds to the hexadecimal values F448 to 0BB8

(-3000 to 3000). The entire data range is F31C to 0CE4 (-3300 to 3300). A neg-

ative voltage is expressed as a two’s complement.

Converted Data

Hexadecimal (Decimal)

0CE4 (3300)

0BB8 (3000)

-11 V -10 V

0000 (0)

0 V

10 V 11 V

F448 (-3000)

F31C (-3300)

0 to 10 V

The 0- to 10-V range corresponds to the hexadecimal values 0000 to 1770 (0 to

6000). The entire data range is FED4 to 189C (-300 to 6300). A negative voltage

is expressed as a two’s complement.

Converted Data

Hexadecimal (Decimal)

189C (6300)

1770 (6000)

0000 (0)

-0.5 V

10 V 10.5 V

FED4 (-300)

0 V

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0 to 5 V

The 0- to 5-V range corresponds to the hexadecimal values 0000 to 1770 (0 to

6000). The entire data range is FED4 to 189C (-300 to 6300). A negative voltage

is expressed as a two’s complement.

Converted Data

Hexadecimal (Decimal)

189C (6300)

1770 (6000)

0000 (0)

-0.25 V

5 V 5.25 V

FED4 (-300)

0 V

1 to 5 V

The 1- to 5-V range corresponds to the hexadecimal values 0000 to 1770 (0 to

6000). The entire data range is FED4 to 189C (-300 to 6300). Inputs between

0.8 and 1 V are expressed as two’s complements. If the input falls below 0.8 V,

open-circuit detection will activate and converted data will be 8000.

Converted Data

Hexadecimal (Decimal)

189C (6300)

1770 (6000)

0.8 V

0000 (0)

FED4 (-300)

1 V

5 V

5.2 V

0 to 20 mA

The 0- to 20-mA range corresponds to the hexadecimal values 0000 to 1770 (0

to 6000). The entire data range is FED4 to 189C (-300 to 6300). A negative volt-

age is expressed as a two’s complement.

Converted Data

Hexadecimal (Decimal)

189C (6300)

1770 (6000)

0000 (0)

-1 mA

20 mA 21 mA

FED4 (-300)

0 mA

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4 to 20 mA

The 4- to 20-mA range corresponds to the hexadecimal values 0000 to 1770 (0

to 6000). The entire data range is FED4 to 189C (-300 to 6300). Inputs between

3.2 and 4 mA are expressed as two’s complements. If the input falls below

3.2 mA, open-circuit detection will activate and converted data will be 8000.

Converted Data

Hexadecimal (Decimal)

189C (6300)

1770 (6000)

3.2 mA

0000 (0)

4 mA

20 mA 20.8 mA

FED4 (-300)

0 mA

Analog Output Signal

The Analog I/O Unit converts the digital output data to analog values. The analog

Ranges

values depend on the output signal ranges, as shown in the following diagrams.

-10 to 10 V

The hexadecimal values F448 to 0BB8 (-3000 to 3000) correspond to an analog

voltage range of -10 to 10 V. The entire output range is -11 to 11 V. Specify a

negative voltage as a two’s complement.

11 V

10 V

F31C

F448

(-3300) (-3000)

Conversion

8000

0000 (0)

Data

0BB8 0CE4

Hexadecimal

0 V

7FFF

(3000) (3300)

(Decimal)

-10 V

-11 V

0 to 10 V

The hexadecimal values 0000 to 1770 (0 to 6000) correspond to an analog volt-

age range of 0 to 10 V. The entire output range is -0.5 to 10.5 V. Specify a nega-

tive voltage as a two’s complement.

10.5 V

10 V

0 V

(-300)

Conversion

Data

8000 FED4

Hexadecimal

1770

189C

0000 (0)

7FFF

(Decimal)

-0.5 V

(6000)

(6300)

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1 to 5 V

The hexadecimal values 0000 to 1770 (0 to 6000) correspond to an analog volt-

age range of 1 to 5 V. The entire output range is 0.8 to 5.2 V.

5.2 V

5 V

1 V

0.8 V

Conversion

0 V

Data

Hexadecimal

FED4

1770

189C

8000

0000 (0)

(Decimal)

7FFF

(-300)

(6000)

(6300)

0 to 20 mA

The hexadecimal values 0000 to 1770 (0 to 6000) correspond to an analog cur-

rent range of 0 to 20 mA. The entire output range is 0 to 21 mA.

21 mA

20 mA

0000

(0)

Conversion

Data

8000

0 mA

1770

189C

Hexadecimal

7FFF

(6000)

(6300)

(Decimal)

4 to 20 mA

The hexadecimal values 0000 to 1770 (0 to 6000) correspond to an analog cur-

rent range of 4 to 20 mA. The entire output range is 3.2 to 20.8 mA.

20.8 mA

20 mA

4 mA

3.2 mA

Conversion

0 mA

Data

Hexadecimal

FED4

1770

189C

8000

0000 (0)

7FFF

(Decimal)

(-300)

(6000)

(6300)

Averaging Function for

The averaging function can be enabled for inputs using the DIP switch. The

Analog Inputs

averaging function stores the average (a moving average) of the last eight input

values as the converted value. Use this function to smooth inputs that vary at a

short interval.

Open-circuit Detection

The open-circuit detection function is activated when the input range is set to 1 to

Function for Analog

5 V and the voltage drops below 0.8 V, or when the input range is set to 4 to

Inputs

20 mA and the current drops below 3.2 mA. When the open-circuit detection

function is activated, the converted data will be set to 8000.

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The open-circuit detection function is enabled or cleared when data is con-

verted. If the input returns to the convertible range, the open-circuit detection is

cleared automatically and the output returns to the normal range.

Using Analog I/O

Connect the Unit.

Connect the Analog I/O Unit.

Analog inputs:

0 to 5 VDC, 1 to 5 VDC, 0 to 10 VDC,

-10 to 10 VDC, 0 to 20 mA, or 4 to 20 mA

Set the I/O ranges.

Analog output:

1 to 5 VDC, 0 to 10 VDC, -10 to 10 VDC,

0 to 20 mA, or 4 to 20 mA

Set inputs as voltage or analog and set the averaging function.

Wire the analog I/O.

Connect analog I/O devices.

Write the range code.

Program operation in the

ladder program.

Analog inputs: Read converted data.

Analog output: Write set values.

Analog Inputs

CPU Unit

Analog I/O Unit

Ladder program

Word (n + 1)

Range code

Word (m + 1)

Analog input 0

(21)

MOVE instruction

converted value

Word (m + 2)

Analog input 1

Writes the range code.

converted value

Reads the converted

values.

Analog devices

Temperature sensor

Where “m” is the last input word and “n” is the

Pressure sensor

Speed sensor

last output word allocated to the CPU Unit, or

Flow sensor

previous Expansion Unit or Expansion I/O Unit.

Voltage/current meter

Other

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Analog Outputs

CPU Unit

Analog I/O Unit

Ladder program

(See note.)

Word (n + 1)

Range code

Analog output set value

(21) MOVE instruction

Writes the range code.

Writes the set value.

Analog devices

Adjustment equipment

Where “n” is the last output word allocated to

Servo Controller

the CPU Unit, or previous Expansion Unit or

Variable speed device

Expansion I/O Unit.

Recorder

Other

Note Word (n + 1) can be used for either the range code or the analog output set value.

This section describes how to connect an Analog I/O Unit to the CPU Unit.

Connecting the

CPM1A-MAD11 Analog

A maximum of 3 Expansion Units or Expansion I/O Units, including up to 3 Ana-

I/O Unit

log I/O Units, can be connected to one CPM2A or CPM1A PC. When the Analog

I/O Unit is used in combination with other Expansion Units or Expansion I/O

Units, there are no restrictions on the connection order.

CPM1A/CPM2A

CPM1A-MAD11

CPU Unit

Analog I/O Unit

I/O Allocation

I/O is allocated for the Analog I/O Unit in the same way as other Expansion Units

or Expansion I/O Units starting from the next word following the last allocated

word on the CPU Unit or previous Expansion Unit or Expansion I/O Unit. When

“m” is the last allocated input word and “n” the last allocated output word on the

CPU Unit, or previous Expansion Unit or Expansion I/O Unit, the allocation will

be as follows:

CPM1A-MAD11

Analog I/O Unit

Analog input 0: Word m+1

Analog input 1: Word m+2

32 inputs

16 outputs

Analog output: Word n+1

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For example, in the following diagram an Analog I/O Unit is connected to a CPU

Unit with 30 I/O points.

IR 000

IR 002

Inputs

IR 001

IR 003

30-point

CPM1A-MAD11

CPU Unit

Analog I/O Unit

IR 010

Outputs

IR 011

IR 012

This section describes how to connect an Analog I/O Unit to the CPU Unit.

Connecting the

CPM2C-MAD11 Analog

A maximum of 5 Expansion Units or Expansion I/O Units (a maximum of 3 Units

I/O Unit

for the CPM2C-S), including up to 4 Analog I/O Units, can be connected to one

CPM2C PC. When the Analog I/O Unit is used in combination with other Expan-

sion Units or Expansion I/O Units, there are no restrictions on the connection

order.

CPU Unit

CPM2C-MAD11 Analog I/O Units

Expansion I/O Unit

I/O Allocation

I/O is allocated for the Analog I/O Unit in the same way as other Expansion Units

or Expansion I/O Units starting from the next word following the last allocated

word on the CPU Unit or previous Expansion Unit or Expansion I/O Unit. When

“m” is the last allocated input word and “n” the last allocated output word on the

CPU Unit, or previous Expansion Unit or Expansion I/O Unit, the allocation will

be as follows:

CPM2C-MAD11 Analog I/O Unit

Analog input 0:

Word m+1

Analog input 1:

Word m+2

Analog output:

Word n+1

For example, in the following diagram an Analog I/O Unit is connected to a CPU

Unit with 20 I/O points.

CPU Unit CPM2C-MAD11 Analog I/O Unit

CPU Unit inputs:

IR 000

Analog input 0:

IR 001

Analog input 1:

IR 002

CPU Unit outputs: IR 010

Analog output:

IR 011

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I/O signal ranges are set by writing a range code to the output word of the Analog

Setting I/O Signal Range

I/O Unit. The range code must be set for the Analog I/O Unit to convert data.

The range code settings provide the combinations of signal ranges for the ana-

log inputs and analog output, as shown in the following table.

Voltage/current selections for the CPM1A-MAD11 are made by connecting the

appropriate terminals. Refer to page 184 for details.

Voltage/current selections for the CPM2C-MAD11 are made using pins 3 and 4

on the DIP switch. refer to page 175 for details.

Range

Analog input 1

Analog input 2

Analog output

code

signal range

000

-10 to 10 V

001

0 to 10 V

010

1 to 5 V or 4 to 20 mA

1 to 5 V

011

1 to 5 V or 0 to 20 mA

0 to 20 mA

100

---

4 to 20 mA

Note

Be sure to write the correct terminals or set the DIP switch to specify either volt-

age or current inputs.

Write the range codes to the Analog I/O Unit’s output word (n + 1) in the first cycle

of program execution.

n+1

Analog Analog Analog

output

input 0

input 1

Example

The following instructions set analog input 0 to 4 to 20 mA, analog input 1 to 0 to

10 V, and the analog output to -10 to 10 V.

SR 25315

(First Cycle Flag)

MOV (21)

#800A

Analog input 0:

4 to 20 mA

011

Analog input 1:

0 to 10 V

Analog output:

-10 to 10 V

The Analog I/O Unit will not start converting analog I/O values until the range

code has been written. Until conversion starts, inputs will be 0000, and 0 V or

0 mA will be output.

After the range code has been set, 0 V or 0 mA will be output for the 0 to 10-V,

-10 to 10-V, or 0 to 20-mA ranges, and 1 V or 4 mA will be output for the 1 to 5-V

and 4 to 20-mA ranges until a convertible value has been written to the output

word.

Once the range code has been set, it is not possible to change the setting while

power is being supplied to the CPU Unit. To change the I/O range, turn the CPU

Unit OFF then ON again.

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Wiring Analog I/O Devices

CPM1A-MAD11 Internal Circuits

Analog Inputs

Analog Outputs

Input 0

Output

510 kΩ

V IN -

V OUT

I IN 0

250 Ω

COM 0 (-)

COM (-)

510 kΩ

Input 1

V IN 1

510 kΩ

I OUT

I IN 1

250 Ω

COM 1 (-)

510 kΩ

Analog ground

CPM1A-MAD11 Terminal Arrangements

I OUT NC

V IN0

COM0 I IN1

V OUT COM NC

I IN0

V IN0

COM1

Label

Signal

V OUT

Voltage output

I OUT

Current output

COM

Output common

V IN0

Voltage input 0

I IN0

Current input 0

COM0

Input common 0

V IN1

Voltage input 1

I IN1

Current input 1

COM1

Input common 1

Note For current inputs, short V IN0 to I IN0 and V IN1 to I IN1

Wiring for Analog Inputs

V IN

Analog device

Analog

Analog device

I IN

with voltage

I IN

I/O

with current

output

Unit

–

output

–

COM

184

Analog I/O Units

Section

3-1

Wiring for Analog Outputs

V OUT

Analog

Analog device

Analog

Analog device

I/O

I OUT

with voltage

I/O

I OUT

with current

Unit

input

Unit

input

COM

–

COM

–

Note

1. Use shielded twisted-pair cables, but do not connect the shield.

2. When an input is not being used, short the + and - terminals.

3. Separate wiring from power lines (AC power supply lines, high-voltage

lines, etc.)

4. When there is noise in the power supply line, install a noise filter on the input

section and the Power Supply Unit.

CPM2C-MAD11 Internal Circuits

Analog Inputs

Analog Outputs

510 kΩ

V+

Input 0

250 Ω

- Output

510 kΩ

I+

Input 1

250 Ω

510 kΩ

Analog ground

CPM2C-MAD11 Terminal Arrangements

Analog Input Terminals

Analog Output Terminals

OUT

Analog input 0 +

0 +

V+

Analog voltage output

Analog input 0 -

0 -

Output common

Analog input 1 +

1 +

I+

Analog current output

Analog input 1 -

1 -

Not used

Analog ground

Not used

Analog Input Wiring

Analog

output

I/O Unit

device

Analog Output Wiring

Analog

V+

I+

+ Analog

Analog

input device

Analog

input device

I/O Unit

with voltage

I/O Unit

with current

–

input

–

input

185

Analog I/O Units

Section

3-1

Note

1. Use shielded twisted-pair cables, but do not connect the shield.

2. When an input is not being used, short the + and - terminals.

3. Separate wiring from power lines (AC power supply lines, high-voltage

lines, etc.)

4. When there is noise in the power supply line, install a noise filter on the input

section and the Power Supply Unit.

Reference Information

Consider the following information on open input circuits when using voltage in-

puts.

If the same power supply is used as shown in the following diagram and an open

circuit occurs at point A or B, an unwanted current flow will occur as shown by the

dotted lines in the diagram, creating a voltage at the other input of about 1/3 to

1/2. If the 1 to 5-V range is being used, the open-circuit detection function will not

operate. Also, if there is an open circuit at C, the open-circuit detection function

will not operate because the negative sides are the same.

Analog

input

device 1

Analog

input

device 2

24 VDC

For example, if analog input device 2 is outputting 5 V and the same power sup-

ply is being used as shown above, about 1/3, or 1.6 V, will be applied at the input

for input device 1.

To eliminate the above problem, either use separate power supplies, or install an

isolator at each input. This problem will not occur for current inputs even if the

same power supply is used.

Note When power is supplied (when setting the range code), or when there is a power

interruption, pulse-form analog output of up to 1 ms may be generated.

If this causes problems with operation, take countermeasure such as those sug-

gested below.

• Turn ON the power supply for the CPU Unit first, and then turn ON the power

supply for the load after confirming correct operation.

186

Analog I/O Units

Section

3-1

• Turn OFF the power supply for the load before turning OFF the power supply

for the CPU Unit.

Ladder Program

Specifying the Range Code

Specify the I/O signal range by writing the range code to the Analog I/O Unit’s

output word from the ladder program in the first cycle of program execution. The

Analog I/O Unit will start to convert analog I/O values once the range code has

been specified and convertible values are provided. (Refer to page NO TAG.)

Write the range code to the Analog I/O Unit’s output word in the first cycle of op-

eration; the Analog I/O Unit’s output word is “n+1” when “n” is the last word allo-

cated to the CPU Unit, or previous Expansion Unit or Expansion I/O Unit in the

configuration.

Reading Converted Analog Input Values

The ladder program can be used to read the memory area where the converted

values are stored. Values are output to the next two words (m + 1, m + 2) follow-

ing the last input word (m) allocated to the CPU Unit or previous Expansion Unit

or Expansion I/O Unit.

Writing Analog Output Set Values

The ladder program can be used to write data to the output word where the set

value is stored. The output word will be “n+1” when “n” is the last output word

allocated to the CPU Unit, or previous Expansion Unit or Expansion I/O Unit.

Startup Operation

After power is turned ON, it will require two cycle times plus approx. 50 ms before

the first data is converted. The following instructions can be placed at the begin-

ning of the program to delay reading converted data from analog inputs until con-

version is actually possible.

Note Analog input data will be 0000 until initial processing has been completed. Ana-

log output data will be 0 V or 0 mA until the range code has been written. After the

range code has been written, the analog output data will be 0 V or 0 mA if the

range is 0 to 10 V, -10 to 10 V, or 0 to 20 mA, or it will be 1 V or 4 mA if the range is

1 to 5 V or 4 to 20 mA.

SR 25315

(Always ON Flag)

TIM 005

TIM 005 will start as soon as power turns ON.

#0002

After 0.1 to 0.2 s (100 to 200 ms), the Comple-

T005

tion Flag for TIM 005 will turn ON, and the con-

verted data from analog input will be read from

MOV (21)

IR 001 and stored in DM 0000.

001

DM0000

Handling Unit Errors

If an error occurs in an Analog I/O Unit, the Error Flags in AR 0200 to AR 0204 for

the CPM2C and AR 0200 to AR 0202 for the CPM1A/CPM2A will be turned ON.

The addresses of the Error Flags are in the order that the Expansion Units and

Expansion I/O Units are connected in the PC, with AR 0200 used for the Expan-

sion Unit or Expansion I/O Unit closest to the CPU Unit. Use these flags in the

program when it is necessary to detect errors.

When an error occurs in the Analog I/O Unit, analog input data will be 0000 and

0 V or 0 mA will be output as the analog output.

If a CPU error or an I/O bus error (fatal errors) occurs at the CPU Unit and the

analog output is set to 1 to 5 V or 4 to 20 mA, 0 V or 0 mA will be output. For any

other fatal errors at the CPU Unit, 1 V or 4 mA will be output.

187

Analog I/O Units

Section

3-1

Programming Example

This programming example uses these ranges:

Analog input 0: 0 to 10 V

Analog input 1: 4 to 20 mA

Analog output:

0 to 10 V

25135

(First Cycle ON Flag)

MOV (21)

8051

011

25313

Writes the range code (8051) to the Unit.

(Always ON Flag)

TIM 005

#0002

Execution

TIM005

condition

MOV (21)

001

DM0000

Execution

Reads analog input 0’s converted value.

TIM005

condition

CMP (20)

002

#8000

25506(=)

01000

Open-circuit alarm

Execution

TIM005

condition

MOV (21)

002

DM0001

Reads analog input 1’s converted value.

Execution

TIM005

condition

MOV (21)

DM0010

011

The content of DM 0010 is written to the output

word as the analog output set value.

188

Temperature Sensor Units

Section

3-2

Temperature Sensor Units

3-2-1

CPM1A/CPM2A Temperature Sensor Units

With the CPM1A or CPM2A, up to three Expansion Units or Expansion I/O Units

can be connected to the CPU Unit. One, two, or three of these Units can be

CPM1A-TS001 or CPM1A-TS101 Temperature Sensor Units. If a CPM1A-

TS002 or CPM1A-TS102 Temperature Sensor Unit is connected to the CPU

Unit, then only one other Expansion Unit or Expansion I/O Unit can be con-

nected. The other Unit can be a CPM1A-TS001/TS101 Temperature Sensor

Unit.

The CPM1A-TS001/TS101 Temperature Sensor Units each provide 2 input

points and the CPM1A-TS002/TS102 Temperature Sensor Units each provide 4

input points, meaning up to 6 temperature input points can be used on one

CPM1A or CPM2A PC. The inputs can be from thermocouples or platinum resis-

tance thermometers.

Up to 3 Units, including Expansion I/O Units and other Expansion

Units. (Only 2 Units if CPM1A-TS002/TS102 is used.)

CPM1A-20EDR1

CPM1A-8ED

CPM1A-TSjjj

CPM1A or CPM2A CPU Unit

Expansion I/O Unit Expansion I/O Unit Temperature Sensor Unit

Thermocouples or

platinum resistance

thermometers

Temperature inputs

Specifications

Item

CPM1A-TS001

CPM1A-TS002

CPM1A-TS101

CPM1A-TS102

Temperature sensors

Thermocouples

Platinum resistance thermometer

Switchable between K and J, but same

Switchable between Pt100 and JPt100, but

type must be used for all inputs.

same type must be used for all inputs.

Number of inputs

Allocated input words

Max. number of Units

(See note 1.)

Accuracy

(The larger of ±0.5% of converted value or

±2_C) ±1 digit max. (See note 2.)

±1_C) ±1 digit max.

Conversion time

250 ms for 2 or 4 input points

Converted temperature data

16-bit binary data (4-digit hexadecimal)

Isolation

Photocouplers between all temperature input signals

Note

1. If only the CPM1A-TS001 and CPM1A-TS101 are connected, then up to 3

Units including Expansion I/O Units and other Expansion Units can be con-

nected. If the CPM1A-TS002 or CPM1A-TS102 is connected, then only one

other Expansion I/O Unit or Expansion Unit can be connected. The CPM1A-

TS001 or CPM1A-TS101 may be the other Unit, but another CPM1A-TS002

or CPM1A-TS102 cannot be connected.

189

Temperature Sensor Units

Section

3-2

2. Accuracy for a K-type sensor at -100°C or less is ±4_C ±1 digit max.

3-2-2

CPM2C Temperature Sensor Units

With the CPM2C (including the CPM2C-S), up to four CPM2C-TS001/TS101

Temperature Sensor Units can be connected (up to three Units for the

CPM2C-S). Each Temperature Sensor Unit provides 2 input points meaning that

a total of 8 input points can be used. The inputs can be from thermocouples or

platinum resistance thermometers.

CPM2C-TS001/101

CPM2C CPU Unit

Temperature Sensor Units

Expansion I/O Unit

Thermocouples or

platinum resistance

thermometers

Temperature inputs

8 points max.

Specifications

Item

CPM2C-TS001

CPM2C-TS101

Temperature sensors

Thermocouples

Platinum resistance

thermometer

Switchable between K

and J, but same type

Switchable between

must be used for all

Pt100 and JPt100, but

inputs.

same type must be used

for all inputs.

Number of inputs

Allocated input words

Max. number of Units

(See note 1.)

Accuracy

(The larger of ±0.5% of

converted value or

±2_C) ±1 digit max. (See

±1_C) ±1 digit max.

note.)

Conversion time

250 ms for 2 input points

Converted temperature data

16-bit binary data (4-digit hexadecimal)

Isolation

Photocouplers between all temperature input

signals

Note

1. Accuracy for a K-type sensor at -100°C or less is ±4_C ±1 digit max.

2. The error deviation for temperatures in °F is double that for °C.

190

Temperature Sensor Units

Section

3-2

3-2-3

Using Temperature Sensor Units

Connect the Unit.

Connect the Temperature Sensor Unit.

Refer to 3-2-4 Connecting Temperature Sensor Units.

Set the temperature unit, 2-decimal-place Mode if

required, and set the temperature input range.

Set the temperature ranges.

Refer to 3-2-5 Setting Temperature Ranges.

Connect the temperature sensors.

Connect temperature sensors.

Refer to 3-2-6 Connecting Temperature Sensors.

Read temperature data stored in the input word.

Program operation in the

Refer to 3-2-7 Ladder Programming.

ladder program.

3-2-4

Connecting Temperature Sensor Units

This section shows example configurations containing Temperature Sensor

Units.

CPM1A/CPM2A Temperature Sensor Unit Allocations

Words are allocated to Temperature Sensor Units just like other Expansion I/O

Units and Expansion Units: In the order in which the Units are connected. A Tem-

perature Sensor Unit will thus be allocated the next input words after the Unit to

which it is connected (CPU Unit or other Unit).

Note Only one 4-input Temperature Sensor Unit (CPM1A-TS002 or CPM1A-TS102,

4 words allocated) can be mounted to the CPU Unit. There are, however, no

restrictions on the mounting order.

Temperature Sensor Units with 2 Inputs: CPM1A-TS001 and CPM1A-TS101 (2 Words Allocated)

CPM1A or CPM2A CPU Unit

CPM1A-20EDR1

CPM1A-8ED

CPM1A-TS001/TS101

(with 20, 30, 40, or 60 I/O points) Expansion I/O Unit Expansion I/O Unit Temperature Sensor Unit

Temperature

2 inputs

CPM1A-TS001

Up to 3 Units can be

Sensor Units

CPM1A-TS101

connected. There are no

restrictions on the order in

Expansion I/O Units

With 8 or 20 I/O points

which Units are

Analog I/O Units

CPM1A-MAD01

connected.

CompoBus/S I/O Link Unit

CPM1A-SRT21

191

Temperature Sensor Units

Section

3-2

Word Allocations

The CPM1A-TS001 and CPM1A-TS101 are allocated two words each (one for

each input point). No output words are allocated.

40-point CPU Unit

20-point Expansion

8-point Expansion

CPM1A-TS001/101

I/O Unit

Input Unit

Temperature Sensor Unit

Input word

IR 000

IR 004

IR 002

IR 003

addresses

IR 001

IR 005

Output word

IR 010

IR 012

None

addresses

IR 011

Temperature Sensor Units with 4 Inputs (4 Words Allocated): CPM1A-TS002 and CPM1A-TS102

CPM1A or CPM2A CPU Unit

CPM1A-20EDR1 CPM1A-TS002/TS102

(with 20, 30, 40, or 60 I/O points) Expansion I/O Unit Temperature Sensor Unit

Temperature

4 inputs

CPM1A-TS002 or

1 Unit only

Up to 2 Units can be

Sensor Units

CPM1A-TS102

connected. There are

no restrictions on the

2 inputs

CPM1A-TS001 or

1 Unit only

order in which Units

CPM1A-TS101

are connected

Expansion I/O Units

With 8 or 20 I/O

points

Analog I/O Units

CPM1A-MAD01

CompoBus/S I/O Link Unit

CPM1A-SRT21

Word Allocations

The CPM1A-TS002 and CPM1A-TS102 are allocated four words each (one for

each input point). No output words are allocated.

CPM1A-TS002/102

60-point CPU Unit

20-point Expansion

Temperature Sensor Unit

I/O Unit

IR 000

IR 004

IR 001

IR 003

IR 005

Input word addresses

IR 002

IR 006

IR 007

IR 010

Output word addresses

IR 011

IR 013

None

IR 012

CPM2C Temperature Sensor Unit Allocations

Up to four CPM2C-TS001/101 Temperature Sensor Units can be connected. Up

to a total of five Expansion I/O Units and Expansion Units can be connected (in-

192

Temperature Sensor Units

Section

3-2

cluding the Temperature Sensor Units.) Up to three Units can be connected to

the CPM2C-S. No matter how many Units are connected, however, no more

than 0 input words and 10 output words can be allocated in one PC. There are no

restrictions on the order in which Units can be connected.

Example

CPM2C-TS001/101

CPM2C CPU Unit

Temperature Sensor Units

Expansion I/O Unit

Four Temperature

Sensor Units max.

Word Allocation

Words are allocated to Temperature Sensor Units just like other Expansion I/O

Units and Expansion Units: In the order in which the Units are connected. A

CPM2C-TS001 or CPM2C-TS101 Temperature Sensor Unit will thus be allo-

cated the next two input words after the Unit to which it is connected (CPU Unit or

other Unit). No output words are allocated.

CPM2C-TS001

CPM2C-TS101

Temperature

CPM2C-24EDTC

20-point CPU Unit

Temperature

Expansion I/O Unit

Sensor Unit

Inputs

IR 001

IR 003

IR 005

IR 007

IR 000

IR 009

IR 002

IR 004

IR 006

IR 008

Outputs

IR 010

None

IR 011

3-2-5

Setting Temperature Ranges

The temperature unit, the number of decimal places used, and the temperature

input range are set on the DIP switch and rotary switch on the Temperature Sen-

sor Unit.

Note

1. Always turn OFF the power supply before setting the temperature range.

2. Never touch the DIP switch or rotary switch during Temperature Sensor Unit

operation. Static electricity may cause operating errors.

193

Temperature Sensor Units

Section

3-2

CPM1A/CPM2A Temperature Sensor Units

CPM1A-TS001/002/101/102

DIP Switch

Used to set the temperature

unit and the number of decimal

Rotary Switch

places used.

Used to set the temperature

input range.

Temperature input terminals

CPM2C Temperature Sensor Units

CPM2C-TS001/101

Expansion I/O connector (output)

Expansion I/O connector (input)

Cold junction compensator

(TS001 only)

Temperature input terminals

DIP Switch

Used to set the temperature

unit and the number of decimal

places used.

Rotary Switch

Used to set the temperature

input range.

DIP Switch Settings

The DIP switch is used to set the temperature unit (°C or °F) and the number of

decimal places used.

CPM1A-TSjjj

CPM2C-TSjjj

SW1

0.01

1 or 0.1

SW1

Setting

Temperature unit

OFF

°C

°F

Number of decimal

OFF

Normal (0 or 1 digit after the decimal

places used

point, depending on the input range)

2-decimal-place Mode (e.g., 0.01)

Note For details on 2-decimal-place Mode, refer to 3-2-8 Two-decimal-place Mode.

194

Temperature Sensor Units

Section

3-2

Note

1. Turn OFF the power supply before changing the temperature range setting.

2. Do not touch the DIP switch or rotary switches while power is turned ON.

Static electricity may cause malfunctions.

Rotary Switch Setting

The rotary switch is used to set the temperature range.

Caution Set the temperature range according to the type of temperature sensor con-

nected to the Unit. Temperature data will not be converted correctly if the tem-

perature range does not match the sensor.

! Caution Do not set the temperature range to any values other than those for which tem-

perature ranges are given in the following table. An incorrect setting may cause

operating errors.

Setting

CPM1A-TS001/002

CPM1A-TS101/102

CPM2C-TS001

CPM2C-TS101

Input

Range

Input

Range

type

(°C)

(°F)

type

(°C)

(°F)

-200 to

-300 to

Pt100

-200.0 to

-300.0 to

1,300

2,300

650.0

1,200.0

0.0 to

JPt100

-200.0 to

-300.0 to

500.0

900.0

650.0

1,200.0

-100 to

---

Setting not possible

850

1,500

0.0 to

---

400.0

750.0

4 to F

---

Setting not possible

---

195

Temperature Sensor Units

Section

3-2

3-2-6

Connecting Temperature Sensors

CPM1A/CPM2A Temperature Sensor Units

Thermocouples

CPM1A-TS001

Either K or J thermocouples can be connected, but both of the thermocouples

must be of the same type and the same input range must be used for each.

Input 0

Input 1

Input 0

Input 1

Temperature input 0

Temperature input 1

Cold junction compensator

CPM1A-TS002

Either K or J thermocouples can be connected, but all four of the thermocouples

must be of the same type and the same input range must be used for each.

Input 0

Input 1

Input 2

Input 3

Input 0

Input 1

Input 2

Input 3

–

Temperature

input 0

input 2

Cold junction

Temperature

compensator

input 1

input 3

Note When using a Temperature Sensor Unit with a thermocouple input, observe the

following precautions:

• Do not remove the cold junction compensator attached at the time of deliv-

ery. If the cold junction compensator is removed, the Unit will not be able to

measure temperatures correctly.

• Each of the input circuits is calibrated with the cold junction compensator

attached to the Unit. If the Unit is used with the cold junction compensator

from other Units, the Unit will not be able to measure temperatures cor-

rectly.

• Do not touch the cold junction compensator. Doing so may result in incor-

rect temperature measurement.

196

Temperature Sensor Units

Section

3-2

Platinum Resistance

Thermometers

CPM1A-TS101

Either Pt100 or JPt100 platinum resistance thermometers can be connected,

but both of the thermometers must be of the same type and the same input range

must be used for each.

Input 0

Input 1

Input 0

Input 1

Temperature input 0

Temperature input 1

CPM1A-TS102

Either Pt100 or JPt100 platinum resistance thermometers can be connected,

but all four of the thermometers must be of the same type and the same input

range must be used for each.

Input 0

Input 1

Input 2

Input 3

Input 0

Input 1

Input 2

Input 3

Temperature

input 0

input 1

input 2

input 3

Note Do not connect anything to terminals not used for inputs.

197

Temperature Sensor Units

Section

3-2

CPM2C Temperature Sensor Units

CPM2C-TS001 (Thermocouples)

Either K or J thermocouples can be connected, but both of the thermocouples

must be of the same type and the same input range must be used for each.

Temperature input 0

Temperature input 1

Cold junction

compensator

Note When using a Temperature Sensor Unit with a thermocouple input, observe the

following precautions:

• Do not touch the cold junction compensator. Doing so may result in incor-

rect temperature measurement.

CPM2C-TS101 (Platinum Resistance Thermometers)

Either Pt100 or JPt100 platinum resistance thermometers can be connected,

but both of the thermometers must be of the same type and the same input range

must be used for each.

Temperature input 0

Temperature input 1

3-2-7

Ladder Programming

Converted Temperature

The temperature data will be stored in the input words allocated to the Tempera-

Data

ture Sensor Unit in 4-digit hexadecimal.

CPM1A-TS001/TS101 and CPM2C-TS001/TS101

“m” is the last word allocated to the CPU Unit, Expansion I/O Unit, or Expansion

Unit connected immediately before the Temperature Sensor Unit.

Word

Contents

m + 1

Converted temperature data from input 0

m + 2

Converted temperature data from input 1

CPM1A-TS002/TS102

“m” is the last word allocated to the CPU Unit, Expansion I/O Unit, or Expansion

Unit connected immediately before the Temperature Sensor Unit.

Word

Contents

m + 1

Converted temperature data from input 0

m + 2

Converted temperature data from input 1

m + 3

Converted temperature data from input 2

m + 4

Converted temperature data from input 3

All Temperature Sensor Units

Negative values are stored as 2’s complements. Data for range codes that in-

198

Temperature Sensor Units

Section

3-2

clude one digit after the decimal point are stored without the decimal point, i.e.,

10 times the actual value is stored. Some examples are provided in the following

table.

Input

Data conversion examples

Unit: 1°

K or J

850° → 0352 Hex

-200° → FF38 Hex

Unit: 0.1°

K, J, Pt100 or

×10

500.0° → 5000 → 1388 Hex

JPt100

-20.0° → -200 → FF38 Hex

-200.0° → -2000 → F830 Hex

If the input temperature exceeds the range that can be converted, the converted

temperature data will be held at the maximum or minimum value in the range. If

the input temperature exceeds the range by more than a specified amount, the

open-circuit detection function will detect an open-circuit and the converted tem-

perature data will be set to 7FFF. The open-circuit detection function will also

operate if the cold junction compensator is faulty. The open-circuit detection

function will be automatically cleared and normal input temperature conversion

will begin automatically when the input temperature returns to the convertible

range.

After power is turned ON, it will require approximately 1 s before the first data is

Startup Operation

converted. The following instructions can be placed at the beginning of the pro-

gram and then IR 02000 can be used to delay reading converted data until con-

version is actually begun.

25313

(Always ON Flag)

CMP (20)

User flag indicating that temperature data

001

conversion has begun.

#7FFE

25506 (=)

02000

User-defined flag indicating that initializa-

tion has been completed

Note Input data will be 7FFE until actual conversion starts.

If an error occurs in an Expansion Unit, the Error Flags in AR 0200 to AR 0204

Handling Unit Errors

will be turned ON ( AR 0200 to AR 0202 for the CPM1A/CPM2A). Refer to page

568 for details. The addresses of the Error Flags are in order that the Expansion

Units are connected in the PC, with AR 0200 used for the Expansion Unit closest

to the CPU Unit. Use these flags in the program when it is necessary to detect

errors.

When an error occurs in a Temperature Sensor Unit, converted temperature

data will be 7FFF.

Note The status of AR 0200 to AR 0204 will not change for the open-circuit detection

function.

The following programming example shows how to convert the input data from 2

Programming Example 1

temperature sensor inputs to BCD and store the result in DM 0000 and

DM 0001. The following system configuration is used.

199

Temperature Sensor Units

Section

3-2

25313

(Always ON Flag)

CMP (20)

Detects completion of input 0 initialization.

001

#7FFE

25506(=)

ON when input 0 has been initialized

02000

25313

(Always ON Flag)

CMP (20)

Detects completion of input 1 initialization.

002

#7FFE

25506

02001

ON when input 1 has been initialized

02000

Execution condition

CMP (20)

Detects an open-circuit alarm or Unit error by check-

ing converted temperature data for the error code

001

7FFF.

#7FFF

25506(=)

01000

ON when an open-circuit alarm or Unit error has been

detected for input 0.

CMP (20)

Checks to see if the temperature data in IR 001 has

001

exceeded 500.0°C (1388 Hex without decimal point).

#1388

25505(>)

01001

ON for an input 0 temperature error

25507(<)

BCD (24)

Converts the contents of IR 001 (temperature data

for input 0) to BCD and stores the result in

001

DM 0000.

DM0000

02001

Execution condition

CMP (20)

Detects an open-circuit alarm or Unit error by check-

ing converted temperature data for the error code

002

7FFF.

#7FFF

25506(=)

ON when an open-circuit alarm or Unit error has been

01002

detected for input 1.

CMP (20)

Checks to see if the temperature data in IR 002 has

002

exceeded 500.0°C (1388 Hex without decimal point).

#1388

25505(>)

01003

ON for an input 1 temperature error

25507(<)

BCD (24)

Converts the contents of IR 002 (temperature data

for input 1) to BCD and stores the result in

002

DM 0001.

DM0001

201

Temperature Sensor Units

Section

3-2

The following programming example shows how to convert the data for temper-

Programming Example 2

ature input 0 to BCD and store the result in DM 0000 and DM 0001. “0001” is

stored in DM 0001 when the input data is a negative value. The following system

configuration is used.

20-point CPU Unit

Temperature Sensor Unit

Inputs

IR 000

IR 001

IR 002

Temperature unit setting:

OFF (°C)

Two-decimal-place Mode:

OFF (normal)

Input range setting:

1 (Pt100, -200.0 to 650.0°C)

Temperature input 0 storage word:

IR 001

Outputs

IR 010

None

Programming with BCD(24) Instruction

25313

(Always ON Flag)

CMP (20)

Detects completion of input 0 initialization.

001

#7FFE

ON when input 0 has been initialized

02000

Execution condition

CMP (20)

Detects an open-circuit alarm or Unit error by check-

ing converted temperature data for the error code

002

7FFF.

#7FFF

25506(=)

ON when an open-circuit alarm or Unit error has been

01000

detected for input 0.

25506(=)

00115

BDC (24)

When the input temperature data is non-negative,

001

converts the contents of IR 001 (temperature data

for input 0) to BCD and stores the result in

DM0000

DM 0000.

MOV (21)

Stores #0000 in DM 0001.

#0000

DM0001

00115

CLC (41)

SBB (51)

When the input temperature data is negative, con-

#0000

verts the contents of IR 001 to the absolute value of

001

the actual temperature and stores the result in

DM 0010.

DM0010

Converts the contents of DM 0010 (absolute value

BCD (24)

of negative temperature data for input 0) to BCD

DM0010

and stores the result in DM 0000.

DM0010

MOV (21)

Stores #0001 in DM 0001 to indicate a negative

number.

#0001

DM0001

202

Temperature Sensor Units

Section

3-2

Programming with SCL2(--) Instruction (CPM2A/CPM2C Only)

25313

(Always ON Flag)

CMP (20)

Detects completion of initialization.

001

#7FFE

25506(=)

02000

ON when initialization complete.

02000

Execution condition

CMP (20)

Detects an open-circuit alarm.

001

#7FFF

25506(=)

01000

ON when an open-circuit alarm has been detected.

25506(=)

SCL2 (-)

001

DM0010

Parameter settings for data conversion:

DM0000

DM0010

#0000

Offset

DM0011

#0001

∆X (Hex)

DM0012

#0001

∆Y (BCD)

25504(CY)

When the converted value is non-negative,

MOV (21)

stores #0000 in DM 0001.

#0000

DM0001

25504(CY)

When the converted value is negative, stores

MOV (21)

#0001 in DM 0001.

#0001

DM0001

Operation

Binary to BCD conversion

IR 001

16³

16²

16¹

16⁰

DM 0000

CY (when using SCL2 instruction)

DM 0001

1/0

10³

10²

10¹

10⁰

1/0

1: Negative, 0: Non-negative

0: If data non-negative, “0000” stored in DM 0001

1: If data negative, “0001” stored in DM 0001

203

Temperature Sensor Units

Section

3-2

3-2-8

Two-decimal-place Mode

If pin 2 on the DIP switch is turned ON, values are stored to two decimal places.

In this case, temperature data is stored as 6-digit signed hexadecimal (binary)

data with 4 digits in the integer portion and 2 digits after the decimal point. The

actual data stored in memory is 100 times the actual value, i.e., the decimal point

is not indicated. Methods for handling this data are described in this section.

Note When set to store values to two decimal places, temperature data as far as two

digits after the decimal point is converted to 6-digit binary data, but the actual

resolution is not 0.01°C (°F). For this reason, there may be skipping and inaccu-

racies in the first digit after the decimal point (0.1). Treat any resolution above

that specified for the normal data format as reference data.

Data Structure

The structure of the data stored in memory is shown below. The value will be 100

times the actual temperature.

jjjjjj

Leftmost 3 Digits and Flags

Leftmost/

Temperature

Open-circuit

Not used.

Temperature data

Rightmost Flag

Unit Flag

Flag

0: Leftmost

0: °C

0: Normal

Always 0

x16⁵

x16⁴

x16³

1: Rightmost

1: °F

1: Error

Rightmost 3 Digits and Flags

Leftmost/

Temperature

Open-circuit

Not used.

Temperature data

Rightmost Flag

Unit Flag

Flag

0: Leftmost

0: °C

0: Normal

Always 0

1: Rightmost

1: °F

1: Error

x16²

x16¹

x16⁰

Leftmost/Rightmost Flag: Indicates whether the leftmost or rightmost 3 digits are provided.

Temperature Unit Flag:

Indicates whether the temperature is in °C or °F.

Open-circuit Flag:

Turns ON (1) when an open-circuit is detected. The temperature

data will be 7FF FFF if this flag is ON.

204

Temperature Sensor Units

Section

3-2

Data Conversion

Some examples of the data stored for various temperature inputs are provided

Examples

below.

Example 1

Temperature:

1,130.25°C

×100:

113025

Temperature Data: 01B981 (hexadecimal for 113025)

Leftmost 3 Digits and Flags

Flags

x16⁵

x16⁴

x16³

Bits

08 to 11

04 to 07

00 to 03

Data

Normal

Temperature

°C

Flags

data

Leftmost

Rightmost 3 Digits and Flags

Flags

x16²

x16¹

x16⁰

Bits

08 to 11

04 to 07

00 to 03

Data

Normal

Temperature

°C

Flags

data

Rightmost

Example 2

Temperature:

-100.12°C

×100:

-10012

Temperature Data: FFD8E4 (hexadecimal for -10012)

Leftmost 3 Digits and Flags

Flags

x16⁵

x16⁴

x16³

Bits

08 to 11

04 to 07

00 to 03

Data

Normal

°C

Flags

Temperature

Leftmost

data

Rightmost 3 Digits and Flags

Flags

x16²

x16¹

x16⁰

Bits

08 to 11

04 to 07

00 to 03

Data

Normal

°C

Flags

Temperature

Rightmost

data

205

Temperature Sensor Units

Section

3-2

Example 3

Temperature:

-200.12°F

×100:

-20012

Temperature Data: FFB1D4 (hexadecimal for -20012)

Leftmost 3 Digits and Flags

Flags

x16⁵

x16⁴

x16³

Bits

08 to 11

04 to 07

00 to 03

Data

Normal

°F

Temperature

Flags

Leftmost

data

Rightmost 3 Digits and Flags

Flags

x16²

x16¹

x16⁰

Bits

08 to 11

04 to 07

00 to 03

Data

Normal

°F

Flags

Temperature

Rightmost

data

Example 4

Temperature:

Open circuit (°F)

Temperature Data: 7FFFFFFF

Leftmost 3 Digits and Flags

Flags

x16⁵

x16⁴

x16³

Bits

08 to 11

04 to 07

00 to 03

Data

Error

Temperature

°F

Flags

data

Leftmost

Rightmost 3 Digits and Flags

Flags

x16²

x16¹

x16⁰

Bits

08 to 11

04 to 07

00 to 03

Data

Error

Temperature

°F

Flags

data

Rightmost

Note

1. Leftmost digits are stored in the lower memory addresses. Treat the data in

the lower memory address as the leftmost digits when programming.

2. Be sure that the data is read at least once every 125 ms to allow for the CPU

Unit’s cycle time and communications time. Correct data may not be ob-

tained if the read cycle is greater than 125 ms.

206

Temperature Sensor Units

Section

3-2

Programming Example

The following programming example shows how to use 2-decimal-place Mode

for the following PC configuration.

20-point CPU Unit

20-point Expansion

Temperature Sensor Unit

I/O Unit

Temperature unit setting:

Inputs

OFF (°C)

IR 000

IR 001

IR 002

IR 003

Two-decimal-place Mode:

ON (2 digits after decimal point stored)

Outputs

IR 010

IR 011

None

In this example, 100 times the temperature data for temperature input 0 is stored

in binary form in DM 0100 to DM 0102.

Leftmost data

IR 200

Temperature input 0

IR 002

Rightmost data

Bit

DM 0100

x16³

x16²

x16¹

x16⁰

DM 0101

x16⁷

x16⁶

x16⁵

x16⁴

DM 0102

Always 0

Temperature Unit Flag (0: °C, 1: °F)

Open-circuit Flag (0: Normal, 1: Error)

The following program would be used.

207

Temperature Sensor Units

Section

3-2

25315

(First Scan Flag)

MOV (21)

(1)

Sets DM 0103 and DM 0102 to

#0000

#0100 and #0000, respectively.

DM0102

MOV (21)

#0100

25313

DM0103

(Always ON Flag)

CMP (20)

002

Detects completion of input 0 initialization.

#7FFE

25506(=)

02000

ON when input 0 has been initialized.

02000

00213 (open-circuit detected)

01000

Open-circuit alarm output

00215 (leftmost digits)

SET 02001

Ready for data conversion.

02001

00215 (leftmost digits)

MOV (21)

(2)

Leftmost digits moved to IR 200

002

200

00215 (rightmost digits)

(3)

MOVD (83)

002

Leftmost and rightmost digits

#0020

rearranged and moved to

IR 202 and IR 201.

201

MOVD (83)

(4)

200

#0300

201

MOVD (83)

(5)

200

#0011

202

RSET 02001

RSET 02002

Data rearrangement completed.

(continued next page.)

208

Temperature Sensor Units

Section

3-2

02002

00207 (non-negative data)

BCDL (59)

(6)

201

If the temperature data is non-negative, the

binary data in IR 202 and IR 201 is converted

DM0100

to BCD and placed in DM 0101 and DM 0100.

00207 (negative data)

CLC (41)

(7)

If the temperature data is negative, the 2’s

SBB (51)

complement data in IR 202 and IR 201 is

DM0102

converted to binary data representing the

201

absolute value of the temperature input

and placed in HR 01 and HR 00.

HR00

SBB (51)

DM0103

202

HR01

BCDL (59)

(8)

The binary data in HR 01 and HR 00 is con-

HR00

verted to BCD and placed in DM 0101 and

DM0100

DM 0100.

MOVD (83)

(9)

“1” is written to the bit in DM 0101

#0008

indicating negative data.

#0300

DM0101

RSET 02002

Note The BCDL(59) instruction is only available with the CPM2A and CPM2C.

The data movements corresponding to the numbers in the above ladder pro-

gramming example are illustrated in the following diagram.

IR 002: Leftmost 3 digits of temperature data

IR 002: Rightmost 3 digits of temperature data

16⁵

16⁴

16³

16²

16¹

16⁰

(2)

(3)

IR 200

16⁵

16⁴

16³

(4)

(5)

IR 202

16⁵

16⁴

IR 201

16⁴

16³

16¹

16⁰

(6)

If the temperature data is non-negative, the

binary data in IR 202 and IR 201 is converted

to BCD and placed in DM 0101 and DM 0100.

DM0101

0/8

10⁶

10⁵

10⁴

DM0100

10³

10²

10¹

10⁰

(9)

(8)

If temperature data is negative, “8” is written here

If the temperature data is negative, the binary

(i.e., “1” is written to the bit indicating negative data).

data in HR 01 and HR 00 is converted to BCD

and placed in DM 0101 and DM 0100.

(1)

#0100

(1)

#0000

DM0103

DM0102

–

IR 202

2’s complement data

IR 201

2’s complement data

HR 01

16⁵

16⁴

HR 00

16³

16²

16¹

16⁰

(7)

The 2’s complement data in IR 202 and IR 201 is subtracted, as binary data,

from the data in DM 0103 and DM 0102 and placed in HR 01 and HR 00.

209

CompoBus/S I/O Link Units

Section

3-3

CompoBus/S I/O Link Units

The CPM1A, CPM2A, or CPM2C (including the CPM2C-S) PCs can function as

Slaves to a CompoBus/S Master Unit (or SRM1 CompoBus/S Master Control

Unit) when a CompoBus/S I/O Link Unit is connected. The CompoBus/S I/O Link

Unit establishes an I/O link of 8 inputs and 8 outputs between the Master Unit

and the PC.

Note For the CPM1A, a CPM1A CPU Unit with 30 or 40 I/O points must be used to

connected the CompoBus/S I/O Link Unit. It cannot be connected to a CPM1A

CPU Unit with 10 or 20 I/O points.

CompoBus/S Master Unit

(or SRM1 CompoBus/S

CPM1A-SRT21

Master Control Unit)

CompoBus/S

CPM1A/CPM2A CPU Unit

I/O Link Unit

CPM2C

CPM2C-SRT21

or CPM2C-S

CompoBus/S

CPU Unit

I/O Link Unit

Special flat cable or VCTF cable

From the standpoint of the CPU Unit, the 8 input bits and 8 output bits allocated

to the CompoBus/S I/O Link Unit are identical to input and output bits allocated to

Expansion I/O Units even though the CompoBus/S I/O Link Unit does not control

actual inputs and outputs. The input and output bits allocated to the Compo-

Bus/S I/O Link Unit are one side of an I/O link between the slave CPU Unit and

the CPU Unit to which the Master Unit is connected.

Master PC (CS1 Series)

CPM1A, CPM2A, or CPM2C

CPU Unit

CompoBus/S

CPU Unit with 30 I/O points

CompoBus/S

Master Unit

I/O Link Unit

I/O memory

Unit No. 0

Node

8 bits

number:

Output

Input

2000

IR 002

8 bits

Input

Output

2004

IR 012

Specifications

Item

Specification

Model number

CPM1A or CPM2A:

CPM1A-SRT21

CPM2C or CPM2C-S :

CPM2C-SRT21

Master/slave

CompoBus/S Slave

Number of I/O points

8 input points, 8 output points

Number of words allocated

1 input word, 1 output word

in CPU Unit I/O memory

(Allocated in the same way as Expansion I/O Units

and other Expansion Units)

Node number setting

Set using the DIP switch

(Set before turning on the CPU Unit’s power supply.)

210

CompoBus/S I/O Link Units

Section

3-3

LED Indicators

Indicator

Status

Meaning

COMM

Communications in progress.

(yellow

)

OFF

Communications stopped or error has occurred.

ERR

A communications error has occurred.

(red)

OFF

Indicates normal communications or stand-by.

Usage Procedure

Connect the Unit.

Connect the CompoBus/S I/O Link Unit.

The node number should be a unique number between 0 and 15.

Determine the node address of

the CompoBus/S I/O Link Unit and

Use the DIP switch to set the CompoBus/S I/O Link Unit’s node

set the DIP switch.

number, communications mode, and the status of output data

when a communications error occurs.

Wire the CompoBus/S transmission

Connect the CompoBus/S I/O Link Unit to a CompoBus/S

path.

transmission path.

Connecting the

Connect the CompoBus/S I/O Link Unit to the CPU Unit. The number of Compo-

CompoBus/S I/O Link

Bus/S I/O Link Units that can be connected depends on the PC. Three Units can

Unit

be connected to the CPM1A/CPM2A, five Units can be connected to the

CPM2C, and three Units can be connected to the CPM2C-S. When Expansion

I/O Units or other Expansion Units are also connected, they can be connected in

any order from the CPU Unit.

CPM1A-SRT21

CPM2C or

CompoBus/S

CPM2C-S CompoBus/S I/O

CPM1A/CPM2A CPU Unit

I/O Link Unit

CPU Unit

Link Unit

I/O Allocation

I/O words are allocated to the CompoBus/S I/O Link Unit in the same way as

Expansion I/O Units or other Expansion Units, the next available input and out-

put words are allocated. When “m” is the last allocated input word and “n” is the

last allocated output word, the CompoBus/S I/O Link Unit is allocated “m+1” as

its input word and “n+1” as its output word.

CompoBus/S I/O Link Unit

Word m+1

bits 00 to 07

8 inputs

8 outputs

Word n+1

bits 00 to 07

211

CompoBus/S I/O Link Units

Section

3-3

In the following example, a CompoBus/S I/O Link Unit is connected to a CPU

Unit with 30 I/O points.

IR 000

IR 002

Input words

IR 001

CPU Unit with

CompoBus/S

30 I/O points

I/O LInk Unit

IR 010

Output words

IR 011

IR 012

The input word (m+1) contains the 8 bits of data from the Master Unit and two

CompoBus/S communications flags.

09 08 07

Word m+1

Data from the Master Unit

CompoBus/S Communications Error Flag

0: Normal; 1: Error

CompoBus/S Communication Status Flag

0: Stopped; 1: Communicating

Write the data to be transmitted to the Master Unit in the output word (n+1).

Word n+1

Data to be transferred to the Master Unit

The 8 bits of I/O data are not always transmitted simultaneously. In other words,

8 bits of data transmitted from the Master CPU Unit at the same time will not al-

ways reach the Slave CPU Unit simultaneously, and 8 bits of data transmitted

from the Slave CPU Unit at the same time will not always reach the Master CPU

Unit simultaneously.

When the 8 bits of input data must be read together, modify the ladder program in

the CPU Unit receiving the data. For example, read the input data twice in suc-

cession and accept the data only when the two values match.

Unused bits in the CompoBus/S I/O Link Unit’s output word can be used as work

bits, but unused bits in the output slaves cannot be used as work bits.

Unused bits in input word cannot be used as work bits.

Determining the Node Number and Making DIP Switch Settings

Node Number

The CompoBus/S I/O Link Unit is a Slave Unit with 8 input bits and 8 output bits.

The node number setting is made using the DIP switch; the inputs and outputs

share the same node number.

The range of possible node number settings is determined by the type of PC the

Master Unit is mounted to and the settings on the Master Unit. For details refer to

the CompoBus/S Operation Manual.

212

CompoBus/S I/O Link Units

Section

3-3

DIP Switch Settings

Use the DIP switch to set the CompoBus/S I/O Link Unit’s node number, commu-

nications mode, and the status of output data when a communications error oc-

curs.

CPM1A-SRT21

DIP switch

CPM2C-SRT21

Contents

labels

1, 2, 4,

Node Address Setting

and 8

Pins

Address

8421

Address

8421

0000

1000

0001

1001

0010

1010

0011

1011

0100

1100

0101

1101

0110

1110

0111

1111

1 = ON, 0 = OFF

Long-distance communications mode (See note 2.)

OFF

High-speed communications mode

HOLD

Retain inputs after a communications error.

OFF

Clear inputs after a communications error.

Note

1. Always turn OFF the power supply before changing the DIP switch settings.

2. Never touch the DIP switch when the Unit is operating. Static electricity may

cause operating errors.

213

CompoBus/S I/O Link Units

Section

3-3

3. The long-distance communications mode can be used only when one of the

following

Master Units is connected: C200HW-SRM21-V1,

CQM1-SRM21-V1, or SRM1-C0j-V2.

Wiring the CompoBus/S

Wire the CompoBus/S communications path as shown in the following dia-

Communications Path

grams.

CPM1A-SRT21

These terminals are not used. They can

however be used as communications

NC (BS+)

power supply relay terminals.

NC (BS-)

(BS +)

(BS -)

Connect the CompoBus/S Communications Cable.

CPM2C-SRT21

From the CompoBus/S

communications path

BD L

BD H

BD L

To the CompoBus/S

communications path

214

DeviceNet I/O Link Unit

Section

3-4

DeviceNet I/O Link Unit

The CPM1A or CPM2A PCs can function as slaves to a DeviceNet master when

a DeviceNet I/O Link Unit is connected. The DeviceNet I/O Link Unit establishes

an I/O link of 32 inputs and 32 outputs between the master and the PC.

A maximum of 3 DeviceNet I/O Link Units, can be connected to a CPM2A or

CPM1A to create I/O Links for up to 192 points (96 inputs and 96 outputs).

PC supporting DeviceNet master,

e.g., CS1, C200HX/HG/HE (-Z),

CVM1, CV-series, etc.

DeviceNet Master Unit

or DeviceNet Unit

DeviceNet transmission path

DeviceNet slave

Each Unit enables remote I/O

communications for 32 input

and 32 output points as a De-

viceNet slave.

CPM1A or CPM2A

CPM1A-DRT21

CPU Unit

DeviceNet I/O Link Unit

From the standpoint of the CPU Unit, the 32 input bits and 32 output bits allo-

cated to the DeviceNet I/O Link Unit are identical to input and output bits allo-

cated to Expansion I/O Units even though the DeviceNet I/O Link Unit does not

control external inputs and outputs. The input and output bits allocated to the

DeviceNet I/O Link Unit are one side of an I/O link between the slave CPU Unit

and the CPU Unit to which the Master Unit is connected.

Master PC (CS1 Series with fixed allocations)

CPM1A or CPM2A

CPU Unit

DeviceNet

CPU Unit with 30 I/O points

DeviceNet

Master Unit

I/O Link Unit

I/O memory

Unit No. 0

Node

32 bits

Inputs

Outputs

number:

IR 002

CIO 50

IR 003

CIO 51

32 bits

Inputs

Output

CIO 350

IR 012

CIO 351

IR 013

Note Refer to the DeviceNet Slaves Operation Manual (W347) for details on Device-

Net networks.

215

DeviceNet I/O Link Unit

Section

3-4

Specifications

Item

Specification

Model number

CPM1A-DRT21

Master/slave

DeviceNet Slave

Number of I/O points

32 input points, 32 output points

Number of words allocated

2 input words, 2 output words

in CPU Unit I/O memory

(Allocated in the same way as Expansion I/O Units

and other Expansion Units)

Node number setting

Set using the rotary switches

(Set before turning ON the CPU Unit’s power supply.)

LED Indicators

Indicator

Color

Status

Meaning

Green

Lit

Normal status

Flashing

Switch settings being read

Red

Lit

Fatal hardware error (watchdog timer)

Flashing

Nonfatal error: Incorrect switch settings.

---

OFF

Power not supplied.

Waiting for initialization to start.

Reset in progress.

Green

Lit

Network normal and communications

established.

Flashing

Network normal and communications not

established.

Red

Lit

Fatal communications error: Unit has detected

network status preventing normal

communications.

Node number duplications

Bus OFF detected.

Flashing

Nonfatal communications error: Communications

timeout or communications error for one or more

slaves.

---

OFF

Waiting for node number check by master.

Switch setting error.

Power not supplied.

If an error occurs in the DeviceNet I/O Link Unit, the Error Flags in AR 0200 to

Handling Unit Errors

AR 0202 will be turned ON. The addresses of the Error Flags are in the order that

the Expansion Units are connected in the PC, with AR 0200 used for the Expan-

sion Unit closest to the CPU Unit. Use these flags in the program when it is nec-

essary to detect errors.

Usage Procedure

Connect the Unit.

Connect the DeviceNet I/O Link Unit.

The node number should be a unique number between 0 and 63.

Determine the node number of the

DeviceNet I/O Link Unit and set

Use the DIP switch to set the DeviceNet I/O Link Unit’s baud rate

the rotary switches.

and the status of output data when a communications error occurs.

Wire the DeviceNet transmission

Connect the DeviceNet I/O Link Unit to a DeviceNet trans-

path.

mission path.

216

DeviceNet I/O Link Unit

Section

3-4

Connecting the

Connect the DeviceNet I/O Link Unit to the CPU Unit. Up to three Units can be

DeviceNet I/O Link Unit

connected to the CPM1A/CPM2A. When Expansion I/O Units or other Expan-

sion Units are also connected, they can be connected in any order from the CPU

Unit.

CPM1A-DRT21

DeviceNet

CPM1A/CPM2A CPU Unit

I/O Link Unit

I/O Allocation

I/O words are allocated to the DeviceNet I/O Link Unit in the same way as Expan-

sion I/O Units or other Expansion Units, the next available input and output

words are allocated. When “m” is the last allocated input word and “n” is the last

allocated output word, the DeviceNet I/O Link Unit is allocated “m+1” as its input

word and “n+1” as its output word.

DeviceNet I/O Link Unit

Word m+1 bits 00 to 15

Word m+2 bits 00 to 15

32 inputs

32 outputs

Word n+1 bits 00 to 15

Word n+2 bits 00 to 15

In the following example, a DeviceNet I/O Link Unit is connected to a CPU Unit

with 30 I/O points.

IR 000

IR 002

Input words

IR 003

IR 001

CPU Unit with

DeviceNet I/O

30 I/O points

LInk Unit

IR 010

IR 012

Output words

IR 011

IR 013

All of the words allocated to the DeviceNet I/O Link Unit are used to read and

write data between the CPU Unit of the DeviceNet I/O Link Unit and the CPU Unit

of the DeviceNet master, as shown in the following illustration.

DeviceNet master

15 14

13 12 11 10

Input bits

IR 000

I/O memory

IR 001

IR 00000 to IR 00011: 12 bits

CPU Unit

Do not use.

(m)

IR 00100 to IR 00105: 6 bits

IR 002

(m+1)

IR 00200 to IR 00215: 16 bits

DeviceNet I/O Link

32 bits

IR 003

IR 00300 to IR 00315: 16 bits

Unit

(m+2)

15 14

13 12 11 10

Output bits

IR 010

IR 011

IR 01000 to IR 01007: 8 bits

CPU Unit

(n)

IR 01100 to IR 01103: 4 bits

IR 012

(n+1)

IR 01200 to IR 01215: 16 bits

DeviceNet I/O Link

32 bits

IR 013

IR 01300 to IR 01315: 16 bits

Unit

(n+2)

The 32 bits each of I/O data are not always transmitted simultaneously. In other

words, 32 bits of data transmitted from the Master CPU Unit at the same time will

not always reach the Slave CPU Unit simultaneously, and 32 bits of data trans-

mitted from the Slave CPU Unit at the same time will not always reach the Master

CPU Unit simultaneously.

217

DeviceNet I/O Link Unit

Section

3-4

When the 32 bits of input data must be read together, modify the ladder program

in the CPU Unit receiving the data. For example, read the input data twice in suc-

cession and accept the data only when the two values match.

Unused bits in the DeviceNet I/O Link Unit’s output words can be used as work

bits if they are not used for output from the slave.

Unused bits in input word cannot be used as work bits.

Determining the Node Number and Making DIP Switch Settings

Node Address Switches

Use these switches to set the node address of the Unit.

Setting method: Two-digit decimal

Setting range:

0 to 63 (Do not set 64 to 99.)

Note

1. Set the rotary switches before turning ON the power supply. The switch set-

tings are read only at startup.

2. Any node address from 0 through 63 can be set as long as it hasn’t been set

on another slave node.

3. If the node address is the same as one set on another node, a node address

duplication error will occur and it won’t be possible to start up network com-

munications. Refer to the DeviceNet Slaves Operation Manual (W347) for

details.

DIP Switch

The DIP switch on the front of the DeviceNet I/O Link Unit is used to set the baud

rate and whether to hold or clear the remote outputs when a communications

error occurs in the slave.

Baud rate

Not used.

Hold/clear input for communications error (when used as a slave)

The settings of the DIP switch pins are shown in the following table. All pins are

set to OFF at the factory.

Function

Setting

Baud rate

See the next table.

Not used

OFF

Hold/clear remote outputs for

OFF:

Clear remote outputs

communications error

ON:

Hold remote outputs

Baud Rate

Pins 1 and 2 are used to set the baud rate as shown in the following table.

Pin 1

Pin 2

Baud rate

Max. transmission path length

(reference)

OFF

125 kbps

500 m

OFF

250 kbps

250 m

OFF

500 kbps

100 m

Not allowed.

---

Note

1. Always turn OFF the PC before changing the DIP switch settings.

2. Set the same baud rate on all of the nodes (Master and Slaves) in the Net-

work. Any slaves with baud rates different from the master’s rate won’t be

able to participate in communications and may cause a communications er-

ror between nodes that have been set properly.

218

DeviceNet I/O Link Unit

Section

3-4

Hold/Clear Remote Outputs

When the DeviceNet Unit is used as a slave, pin 4 is used to set whether to hold

or clear remote outputs when a communications error occurs.

Note When using AR 02 (Expansion Unit Error Flags) in the program, turn ON pin 4 on

the DIP switch. If communications are set to be cleared, the timing for clearing

outputs and setting the Error Flags may not agree.

Wire the DeviceNet communications path as shown in the following diagram.

Wiring the DeviceNet

Communications Path

CPM1A-DRT21

DeviceNet I/O Link Unit

Connector provided with Unit

(XW4B-05C1-H1-D)

Multidrop Connector

Black (+V)

(XW4B-05C4-TF-D)

Blue (CAN high)

Shield

White (CAN low)

Red (-V)

DeviceNet Connectors

Use the following connectors.

Model

Form and specifications

XW4B-05C1-H1-D

OMRON connector with screws (included with DeviceNet I/O

Link Unit).

XW4B-05C4-TF-D

OMRON connector for multidrop connections (See note.)

Note Use the XW4B-05C4-TF-D when wiring multidrop connections using

Thick Cables.

Use the following screwdriver for the above connector.

XW4Z-00C

3.5 mm

0.6 mm

219

SECTION 4

Communications Functions

This section describes how to use the communications functions provided in the CPM1, CPM1A, CPM2A, CPM2C (includ-

ing the CPM2C-S), and SRM1(-V2) PCs.

4-1

Introduction

222

4-1-1

Overview

222

4-1-2

Wiring Ports

222

4-2

CPM1/CPM1A Communications Functions

223

4-2-1

Host Link Communications

223

4-2-2

One-to-one NT Link Communications

224

4-2-3

One-to-one PC Link Communications

225

4-3

CPM2A/CPM2C Communications Functions

227

4-3-1

Host Link Communications

227

4-3-2

No-protocol Communications

247

4-3-3

One-to-one NT Link Communications

256

4-3-4

One-to-one PC Link Communications

259

4-4

SRM1(-V2) Communications Functions

264

4-4-1

Host Link Communications

264

4-4-2

No-protocol Communications

268

4-4-3

One-to-one NT Link Communications

273

4-4-4

One-to-N NT Link Communications

274

4-4-5

One-to-one PC Link Communications

275

4-5

Host Link Commands

277

4-5-1

IR/SR AREA READ - RR

277

4-5-2

LR AREA READ - RL

278

4-5-3

HR AREA READ - RH

278

4-5-4

PV READ - RC

278

4-5-5

TC STATUS READ - RG

279

4-5-6

DM AREA READ - RD

279

4-5-7

AR AREA READ - RJ

280

4-5-8

IR/SR AREA WRITE - WR

281

4-5-9

LR AREA WRITE - WL

281

4-5-10

HR AREA WRITE - WH

282

4-5-11

PV WRITE - WC

282

4-5-12

TC STATUS WRITE - WG

283

4-5-13

DM AREA WRITE - WD

284

4-5-14

AR AREA WRITE - WJ

284

4-5-15

SV READ 1 - R#

285

4-5-16

SV READ 2 - R$

286

4-5-17

SV CHANGE 1 - W#

287

4-5-18

SV CHANGE 2 - W$

288

4-5-19

STATUS READ - MS

289

4-5-20

STATUS WRITE - SC

290

4-5-21

ERROR READ - MF

291

4-5-22

FORCED SET - KS

292

4-5-23

FORCED RESET - KR

293

4-5-24

MULTIPLE FORCED SET/RESET - FK

294

4-5-25

FORCED SET/RESET CANCEL - KC

295

4-5-26

PC MODEL READ - MM

296

4-5-27

TEST - TS

296

4-5-28

PROGRAM READ - RP

297

4-5-29

PROGRAM WRITE - WP

297

4-5-30

COMPOUND COMMAND - QQ

298

4-5-31

ABORT - XZ

300

4-5-32

INITIALIZE - ::

300

4-5-33

TXD RESPONSE - EX

300

4-5-34

Undefined Command - IC

301

221

Introduction

Section

4-1

Introduction

4-1-1

Overview

CPM1/CPM1A

The CPM1/CPM1A can execute a variety of communications through its periph-

Communications

eral port via an RS-232C Adapter or an RS-422 Adapter.

Host Link Communications

The CPM1/CPM1A PCs are compatible with the Host Link System, which allows

up to 32 PCs to be controlled from a host computer. An RS-232C Adapter is used

for 1:1 communications and an RS-422 Adapter and B500-AL004 Link Adapter

are used for 1:N communications.

A CPM1/CPM1A equipped with an RS-232C Adapter can also communicate

with a OMRON Programmable Terminal using host link commands.

Refer to 4-2-1 CPM1/CPM1A Host Link Communications in this manual and

1-2-2 Host Link Communications in the CPM1 Operation Manual or 1-2-2 Host

Link Communications in the CPM1A Operation Manual for more details.

One-to-one PC Link

A data link can be created with a data area in another CPM1, CPM1A, CPM2A,

CPM2C, CQM1, C200HX/HG/HE, or C200HS PC. An RS-232C Adapter is used

to make the 1:1 connection.

Refer to 4-2-3 CPM1/CPM1A 1:1 PC Link Communications in this manual and

1-2-3 One-to-one PC Communications Links in the CPM1 Operation Manual or

1-2-3 One-to-one PC Communications Links in the CPM1A Operation Manual

for more details.

One-to-one NT Link

Using the 1:1 NT Link, the CPM1/CPM1A PC can connected to the OMRON

Programmable Terminal (NT Link Interface) through an RS-232C Adapter.

Refer to 4-2-2 CPM1/CPM1A 1:1 NT Link Communications in this manual and

1-2-4 One-to-one NT Link Communications in the CPM1 Operation Manual or

NT Link Communications in the CPM1A Operation Manual for more details.

CPM2A/CPM2C

The following types of communications can be executed through the ports of the

Communications

CPM2A/CPM2C.

• Host Link communications with a host computer

• RS-232C communications with a computer or other device

• One-to-one PC Link communications with another PC

• One-to-one NT Link communications with OMRON Programmable Terminals

This section explains the required PC Setup and methods for using these types

of communications.

SRM1(-V2) Communications

The following types of communications can be executed through the ports of the

SRM1(-V2).

• Host Link communications with a host computer

• RS-232C communications with a computer or other device

• One-to-one PC Link communications with another PC

• One-to-one NT Link communications with OMRON Programmable Terminals

Note

One-to-one NT Link communications are not possible with the SRM1-C01,

which is equipped with only a peripheral port. The SRM1-C01 may be connected

to a PT through an RS-232C Adapter in Host Link mode.

4-1-2

Wiring Ports

Refer to the CPM1 Operation Manual, CPM1A Operation Manual, CPM2A Op-

eration Manual, CPM2C Operation Manual, or SRM1 Master Control Units Op-

eration Manual for information on wiring the communications ports.

222

CPM1/CPM1A Communications Functions

Section

4-2

CPM1/CPM1A Communications Functions

4-2-1

Host Link Communications

Host Link communications were developed by OMRON for the purpose of con-

necting PCs and one or more host computers by RS-232C cable, and controlling

PC communications from the host computer. Normally the host computer issues

a command to a PC, and the PC automatically sends back a response. Thus the

communications are carried out without the PCs being actively involved. The

PCs also have the ability to initiate data transmissions when direct involvement

is necessary.

In general, there are two means for implementing Host Link communications.

One is based on C-mode commands, and the other on FINS (CV-mode) com-

mands. The CPM1/CPM1A supports C-mode commands only. For details on

Host Link communications, refer to 4-5 Host Link Commands.

PC Setup Settings

The CPM1/CPM1A’s peripheral port settings must be set properly in order to use

the Host Link communications, as shown in the following table.

Word

Bit

Function

Setting

DM 6650

00 to 07

Port settings¹

00: Standard (1 start bit, 7-bit data, 2 stop bits, even parity, 9,600 bps)

01: Settings in DM 6651

08 to 11

Link area for 1:1 PC Link via peripheral port

0: LR 00 to LR 15

(Any val-

ue is OK)

12 to 15

Communications mode¹

0: Host Link; 2: 1:1 PC Link Slave; 3: 1:1 PC Link Master; 4: 1:1 NT Link

DM 6651

00 to 07

Baud rate¹

00: 1.2K, 01: 2.4K, 02: 4.8K, 03: 9.6K, 04: 19.2K

(Any val-

ue is OK)

08 to 15

Frame format¹

Start

Length

Stop

Parity

(Any val-

00:

1 bit

7 bits

1 bit

Even

ue is OK)

01:

1 bit

7 bits

1 bit

Odd

02:

1 bit

7 bits

1 bit

None

03:

1 bit

7 bits

2 bit

Even

04:

1 bit

7 bits

2 bit

Odd

05:

1 bit

7 bits

2 bit

None

06:

1 bit

8 bits

1 bit

Even

07:

1 bit

8 bits

1 bit

Odd

08:

1 bit

8 bits

1 bit

None

09:

1 bit

8 bits

2 bit

Even

10:

1 bit

8 bits

2 bit

Odd

11:

1 bit

8 bits

2 bit

None

DM 6652

00 to 15

Transmission delay (Host Link)¹

0000

0000 to 9999: In ms.

DM 6653

00 to 07

Node number (Host Link)¹

00 to 31

00 to 31 (BCD)

08 to 15

Not used.

(Any val-

ue is OK)

Note

1. If an improper setting is used, a non-fatal error will occur, AR 1302 will be

turned ON, and the default setting (0, 00, or 0000) will be used.

2. For information on the Host Link settings for another OMRON PC, refer to

that PC’s Operation Manual.

223

CPM1/CPM1A Communications Functions

Section

4-2

3. If an out-of-range value is set, the following communications conditions will

result. In that case, reset the value so that it is within the permissible range.

Communications mode:

Host Link

Communications format: Standard settings

(1 start bit, 7-bit data; 2 stop bits, even parity,

9,600 bps)

Transmission delay:

Node number:

Example Program

This example shows a BASIC program that reads the status of the CPM1’s in-

puts in IR 000. For more details, refer to 4-5 Host Link Commands.

An FCS (frame check sequence) check isn’t performed on the received re-

sponse data in this program. Be sure that the host computer’s RS-232C port is

configured correctly before executing the program.

1010 ’CPM1 SAMPLE PROGRAM

1020 ’SET THE COMMAND DATA

1030 S$=”@00RR00000001”

1040 FCS=0

1050 FOR I=1 TO LEN(S$)

1060 FCS=FCS XOR ASC(MID$(S$,I,1))

1070 NEXT I

1080 FCS$=(FCS):IF LEN(FCS$)=1 THEN FCS$=”0”+FCS$

1090 CLOSE 1

1100 CLS

1110 PRINT ”SENDING COMMAND”

1120 OPEN ”COM:E73” AS #1

1130 PRINT #1,S$ + FCS + CHR$(13);

1140 CLS

1150 PRINT ”RECEIVING RESPONSE DATA”

1160 LINE INPUT #1,A$

1170 PRINT A$

1180 END

4-2-2

One-to-one NT Link Communications

Using the 1:1 NT Link, the CPM1/CPM1A PC can connected to the Program-

mable Terminal (NT Link Interface) through an RS-232C Adapter.

CPM1 PCs

OMRON Programmable Terminal

RS-232C Adapter

CPM1 CPU Unit

CPM1 CPU

RS-232C Cable

224

CPM1/CPM1A Communications Functions

Section

4-2

CPM1A PCs

RS-232C

OMRON Programmable Terminal

Adapter

CPM1A CPU Unit

RS-232C Cable

PC Setup Settings

The settings relating to 1:1 NT Link PC communications must be set as shown in

the following table.

Word

Bit

Function

Setting

DM 6650

00 to 07

Port settings¹

00: Standard (1 start bit, 7-bit data, 2 stop bits, even parity, 9,600 bps)

(Any val-

01: Settings in DM 6651

ue is OK)

08 to 11

Link area for 1:1 PC Link via peripheral port

0: LR 00 to LR 15

(Any val-

ue is OK)

12 to 15

Communications mode¹

0: Host Link; 2: 1:1 PC Link Slave; 3: 1:1 PC Link Master; 4: 1:1 NT Link

Note

1. If an improper setting is used, a non-fatal error will occur, AR 1302 will be

turned ON, and the default setting (0 or 00) will be used.

2. For information on the NT Link settings for another OMRON PC, refer to that

PC’s Operation Manual.

3. If an out-of-range value is set, the following communications conditions will

result. In that case, reset the value so that it is within the permissible range.

Communications mode:

Host Link

Communications format:

Standard settings

(1 start bit, 7-bit data; 2 stop bits, even parity,

9,600 bps)

Transmission delay:

Node number:

4-2-3

One-to-one PC Link Communications

In a 1:1 PC Link, a CPM1/CPM1A is linked to another CPM1/CPM1A, CPM2A/

CPM2C, CQM1, C200HX/HG/HE, or C200HS PC through an RS-232C Adapter

and standard RS-232C cable. One of the PCs will serve as the Master and the

other as the Slave. The 1:1 PC Link can connect up to 256 bits (LR 0000 to LR

1515) in the two PCs.

225

CPM1/CPM1A Communications Functions

Section

4-2

CPM1/CPM1A One-to-one

The following diagram shows a 1:1 PC Link between two CPM1s PCs. Refer to

PC Links

the CPM1A Operation Manual for the corresponding information on the CPM1A.

RS-232C Cable

RS-232C Adapter

CPM1 CPU Unit

The words used for the 1:1 PC Link are as shown below.

Master

Slave

LR00

Write data

Area for writing

Area for reading

Read data

LR07

LR08

Read data

Area for reading

Area for writing

Write data

LR15

Limitations of 1:1 PC Links

Only the 16 LR words from LR 00 to LR 15 can be linked in the CPM1/CPM1A, so

with a CPM1/CPM1A

use only those 16 words in the CQM1 or C200HS when making a 1:1 PC Link

with one of those PCs. A 1:1 PC Link cannot be made to a CPM1/CPM1A PC

using LR 16 through LR 63 in the CQM1, C200HX/HG/HE, or C200HS.

PC Setup Settings

The settings relating to 1:1 PC Link communications must be set as shown in the

following table.

Word

Bit

Function

Setting

(Master)

(Slave)

DM 6650

00 to 07

Port settings¹

00: Standard (1 start bit, 7-bit data, 2 stop bits, even parity, 9,600 bps)

(Any val-

01: Settings in DM 6651

ue is OK)

08 to 11

Link area for 1:1 PC Link via peripheral port

0: LR 00 to LR 15

(Any val-

ue is OK)

12 to 15

Communications mode¹

0: Host Link; 2: 1:1 PC Link Slave; 3: 1:1 PC Link Master; 4: 1:1 NT Link

Note

1. If an improper setting is used, a non-fatal error will occur, AR 1302 will be

turned ON, and the default setting (0 or 00) will be used.

2. For information on the 1:1 PC Link settings for another OMRON PC, refer to

that PC’s Operation Manual.

3. For information on CPM1/CPM1A 1:1 PC Link connections and wiring dia-

grams refer to 3-4-7 Host Link Connections in the CPM1 Operation Manual

or CPM1A Operation Manual. For the SRM1(-V2) refer to 3-4-4 RS-232C

Port Wiring in the SRM1 Master Control Unit Operation Manual.

4. If an out-of-range value is set, the following communications conditions will

result. In that case, reset the value so that it is within the permissible range.

Communications mode:

Host Link

Communications format:

Standard settings

(1 start bit, 7-bit data; 2 stop bits, even parity,

9,600 bps)

Transmission delay:

Node number:

226

CPM2A/CPM2C Communications Functions

Section

4-3

Example Program

This example shows ladder programs that copy the status of IR 000 in each

CPM1/CPM1A to SR 200 in the other CPM1/CPM1A.

Program in the Master

Program in the Slave

25313 (Always ON)

MOV(21)

000

LR00

LR08

MOV(21)

LR08

LR00

200

LR00

IR 000

Write

Writing area

Reading area

Read

SR 200

LR07

LR08

SR 200

Read

Reading area

Writing area

Write

IR 000

LR15

4-3

CPM2A/CPM2C Communications Functions

This section describes how to use CPM2A/CPM2C (including the CPM2C-S)

communications functions. Read this section if you are using Host Link, no-pro-

tocol, 1:1 NT Link, or 1:1 PC Link communications.

4-3-1

Host Link Communications

Host Link communications are a conversational-type communications protocol,

in which the PC sends responses to commands issued from a host computer

and can be used to read or write data in the PC’s data areas and control some PC

operations. There is no need for a communications program in the PC. Host Link

communications can be used through the peripheral port or the CPM2A/

CPM2C’s RS-232C port.

CPM2A

Commands

Host computer

Responses

227

CPM2A/CPM2C Communications Functions

Section

4-3

CPM2C 1:N Communications

IBM PC/AT or

Connecting Cable

compatible

computer

XW2Z-200S-V (2 m)

XW2Z-500S-V (5 m)

B500-AL004 or NT-AL001 (requires +5 V)

(See notes 1 and 2.)

RS-422 (Total length: 500 m max.)

When using the port

as a peripheral port

CPM2C

CPU Unit

CPM2-CIF11

NT-AL001

When using

NT-AL001

(See note 1.)

the port as

(See note 1.)

XW2Z-070T-1 (0.7 m)

an RS-232C

XW2Z-200T-1 (2 m)

RS-232C port

XW2Z-070T-1 (0.7 m)

port

XW2Z-200T-1 (2 m)

CPM2C

RS-232C port

CPM2C

RS-232C port

CPU Unit

XW2Z-070T-1 (0.7 m)

CPM2C-CN111

CSW1-CN118 Con-

XW2Z-200T-1 (2 m)

Connecting Cable

necting Cable (0.1 m)

(0.15 m)

CPM2C-CIF01

CPM2C-CIF21

Up to 32 PCs

231

CPM2A/CPM2C Communications Functions

Section

4-3

Frame Transmission and Reception

In Host Link communications, the host computer ordinarily has the transmission

right first and initiates the communications. The CPM2A/CPM2C then automati-

cally sends a response.

Commands and responses are exchanged in the order shown in the illustration

below. The block of data transferred in a single transmission is called a “frame.”

A single frame is configured of a maximum of 131 characters of data. The right to

send a frame is called the “transmission right.” The Unit that has the transmis-

sion right is the one that can send a frame at any given time. The transmission

right is traded back and forth between the host computer and the CPM2A/

CPM2C each time a frame is transmitted. The transmission right is passed from

the transmitting Unit to the receiving Unit when either a terminator (the code that

marks the end of a command or response) or a delimiter (the code that sets

frames apart) is received.

Frame (command)

Unit no.

Header code

Host

computer

Text

FCS

Terminator

Next frame transmission

enabled (i.e., transmission

right transferred)

Unit no.

Header code

End code

CPM2A/CPM2C

Text

FCS

Terminator

Frame (response)

Data transmissions from the PC to the host computer can be initiated by the CPU

Slave-initiated

Communications

Unit using TXD(48).

Host

There is no response

computer

from the host computer

Unit no.

Header code

CPM2A/CPM2C

Text

FCS

Terminator

Frame (response)

232

CPM2A/CPM2C Communications Functions

Section

4-3

Command and Response Formats

This section explains the formats for the commands and responses that are ex-

changed in Host Link communications.

Command Format

When transmitting a command from the host computer, prepare the command

data in the format shown below.

x 10¹

x 10⁰

↵

Node No.

Header

Text

FCS

Terminator

code

An “@” symbol must be placed at the beginning.

Node No.

Identifies the CPM2A/CPM2C PC communicating with the host computer.

Specify the CPM2A/CPM2C’s node number in the PC Setup (DM 6648,

DM 6653).

Header Code

Set the 2-character command code.

Text

Set the command parameters.

FCS

Set a 2-character Frame Check Sequence code. See page 235.

Terminator

Set two characters, “*” and the carriage return (CHR$(13)) to indicate the end of

the command.

Response Format

The response from the CPM2A/CPM2C is returned in the format shown below.

Prepare a program so that the response data can be interpreted and processed.

x 10¹ x 10⁰

x 16¹ x 16⁰

↵

Node No.

Header

End code

Text

FCS

Terminator

code

@, Node No., Header Code

Contents identical to those of the command are returned.

End Code

The completion status of the command (e.g., whether or not an error has oc-

curred) is returned.

Text

Text is returned only when there is data such as read data.

FCS

The set 2-character Frame Check Sequence is returned.

Terminator

Set two characters, “*” and the carriage return (CHR$(13)) to indicate the end of

the response.

Long Transmissions

The largest block of data that can be transmitted as a single frame is 131 charac-

ters. A command or response of 132 characters or more must therefore be di-

vided into more than one frame before transmission. When a transmission is

split, the ends of the first and intermediate frames are marked by a delimiter

instead of a terminator.

233

CPM2A/CPM2C Communications Functions

Section

4-3

Dividing Commands

As each frame is transmitted by the host computer, the computer waits for the

delimiter to be transmitted from the CPM2A/CPM2C. After the delimiter has

been transmitted, the next frame will then be sent. This procedure is repeated

until the entire command has been transmitted.

Frame 1 (command)

Frame 2 (command)

Frame 3 (command)

Unit no.

Header code

Host

computer

Text

FCS

Delimiter

Terminator

Delimiter

Unit no.

CPM2A/CPM2C

Header code

End code

Text

FCS

Terminator

Frame (response)

Dividing Responses

As each frame is received by the host computer, a delimiter is transmitted to the

CPM2A/CPM2C. After the delimiter has been transmitted, the CPM2A/CPM2C

will transmit the next frame. This procedure is repeated until the entire response

has been transmitted.

Frame (command)

Unit no.

Header code

Host

computer

Text

FCS

Terminator

Delimiter

Unit no.

Header code

Text

End code

FCS

CPM2A/CPM2C

Text

Delimiter

Terminator

Frame2 (response)

Frame3 (response)

FCS

Delimiter

Frame1 (response)

234

CPM2A/CPM2C Communications Functions

Section

4-3

Precautions for Long

When dividing commands such as WR, WL, WC, or WD that execute write op-

Transmissions

erations, be careful not to divide into separate frames data that is to be written

into a single word. As shown in the illustration below, be sure to divide frames so

that they coincide with the divisions between words.

Frame 1

(131 characters maximum)

Data

↵

x10¹ x10⁰

Node

Header

One word of data

FCS

Delimiter

No.

code

Data from the same word is not divided.

Frame 2 (128 characters maximum)

Data

↵

One word of data

FCS

Terminator

Data from the same word is not divided.

FCS (Frame Check Sequence)

When a frame is transmitted, an FCS is placed just before the delimiter or termi-

nator in order to check whether any data error has been generated. The FCS is

8-bit data converted into two ASCII characters. The 8-bit data is the result of an

EXCLUSIVE OR performed on the data from the beginning of the frame until the

end of the text in that frame (i.e., just before the FCS). Calculating the FCS each

time a frame is received and checking the result against the FCS that is included

in the frame makes it possible to check for data errors in the frame.

↵

Node No. Header code

Text

FCS

Terminator

FCS calculation range

ASCII code

Leftmost

Rightmost

→

0100

0000

XOR

→

0011

0001

XOR

→

0011

0000

XOR

→

0101

0010

XOR

→

0011

0000

XOR

→

0011

0000

XOR

→

0011

0000

XOR

→

0011

0001

Calculation results

0100

0010

↓

Converted to hexadecimal.

Handled as ASCII characters.

235

CPM2A/CPM2C Communications Functions

Section

4-3

Example Program for

This example shows a BASIC subroutine program for executing an FCS check

FCS

on a frame received by the host computer.

Normal reception data includes the FCS, delimiter or terminator, and so on.

When an error occurs in transmission, however the FCS or some other data may

not be included. Be sure to program the system to cover this possibility.

----------------------------------------------------------------------------

400 *FCSCHECK

410 L = LEN ( RESPONSE$ ) ’ .

Data transmitted and received

420 Q = 0 : FCSCK$ = ” ”

430 A$ = RIGHT$ ( RESPONSE$ , 1)

440 PRINT RESPONSE$ , A$ , L

450 IF A$ = ”*” THEN LENGS = LEN ( RESPONSE$ ) - 3

ELSE LENGS = LEN ( RESPONSE$ ) - 2

460 FCSP$ = MID$ ( RESPONSE$ , LENGS + 1 , 2 ) ’ .

FCS data received

470 FOR I = 1 TO LENGS ’ .

Number of characters in FCS

480

Q = ASC ( MID$ ( RESPONSE$ , I , 1 ) ) XOR Q

490 NEXT I

500 FCSD$ = HEX$ ( Q )

510 IF LEN ( FCS0$ ) = 1 THEN FCSD$ = ” 0 ” + FCSD$ ’ .

FCS result

520 IF FCSD$ < > FCSP$ THEN FCSCK$ = ” ERR ”

530 PRINT ” FCSD$ = ” ; FCSD$ , ” FCSP$ = ” ; FCSP$ , ” FCSCK$ = ” ; FCSCK$

540 RETURN

----------------------------------------------------------------------------

236

CPM2A/CPM2C Communications Functions

Section

4-3

Commands

Header

CPM2A/CPM2C Operating Mode

Name

Page

cod

RUN

MONITOR

PROGRAM

Valid

IR/WR/SR AREA READ

277

Valid

LR AREA READ

278

Valid

HR AREA READ

278

Valid

TC PV READ

278

Valid

TC STATUS READ

279

Valid

DM AREA READ

279

Valid

AR AREA READ

280

Not Valid

Valid

IR/WR/SR AREA WRITE

281

Not Valid

Valid

LR AREA WRITE

281

Not Valid

Valid

HR AREA WRITE

282

Not Valid

Valid

TC PV WRITE

282

Not Valid

Valid

TC STATUS WRITE

283

Not Valid

Valid

DM AREA WRITE

284

Not Valid

Valid

AR AREA WRITE

284

Valid

SV READ 1

285

Valid

SV READ 2

286

Not Valid

Valid

SV CHANGE 1

287

Not Valid

Valid

SV CHANGE 2

288

Valid

STATUS READ

289

Valid

STATUS WRITE

290

Valid

ERROR READ

291

Not Valid

Valid

FORCED SET

292

Not Valid

Valid

FORCED RESET

293

Not Valid

Valid

MULTIPLE FORCED SET/RESET

294

Valid

FORCED SET/RESET CANCEL

295

Valid

PC MODEL READ

296

Valid

TEST

296

Valid

PROGRAM READ

297

Not Valid

Valid

PROGRAM WRITE

297

Valid

COMPOUND COMMAND

298

Valid

ABORT (command only)

300

Valid

INITIALIZE (command only)

300

Valid

Not Valid

TXD RESPONSE (response only)

300

---

Undefined command (response only)

301

Note ---: Not affected by the mode.

237

CPM2A/CPM2C Communications Functions

Section

4-3

Response Codes

End

Contents

Probable cause

Corrective measures

code

Normal completion

---

Not executable in RUN mode

The command that was sent can-

Check the relation between the

not be executed when the PC is in

command and the PC mode.

RUN mode.

Not executable in MONITOR mode

The command that was sent can-

not be executed when the PC is in

MONITOR mode.

Address over

The user program area’s highest

Check the program.

address was exceeded.

Not executable in PROGRAM

The command that was sent can-

This code is not presently being

mode

not be executed when the PC is in

used.

PROGRAM mode.

FCS error

The FCS is wrong. Either the FCS

Check the FCS calculation method.

calculation is mistaken or there is

If there was influence from noise,

adverse influence from noise.

transfer the command again.

Format error

The command format is wrong.

Check the format and transfer the

command again.

Entry number data error

The read/write area specification is

Correct the areas and transfer the

wrong.

command again.

Command not supported

The specified command does not

Check the address and instruction.

exist in the specified address.

(Reading the SV, etc.)

Frame length error

The maximum frame length was

Divide the command into multiple

exceeded.

frames.

Not executable

Items to read not registered for

Execute QQ to register items to

composite command (QQ).

read before attempting batch read.

User memory write-protected

The memory is write-protected in

Change the setting in the PC Setup

the PC Setup.

(DM 6602).

Aborted due to FCS error in trans-

The error was generated while a

Check for corrupted frames, correct

mit data

command extending over more

if necessary, and try the transfer

than one frame was being

again.

Aborted due to format error in

executed.

transmit data

Aborted due to entry number data

Note: The data up to that point has

error in transmit data

already been written to the ap-

propriate area of the CPU Unit

Aborted due to frame length error

in transmit data

Other

---

Influence from noise was received.

Transfer the command again.

Application Procedure

Setting the CPU Unit’s

Set the CPM2A CPU Unit’s communications switch

communications switch

or the CPM2C CPU Unit’s DIP switch.

Connecting the cables

Make the 1:1 or 1:N connection.

Ladder program

Commands issued from the host

(Communications initiated by

computer.

CPM2A/CPM2C)

238

CPM2A/CPM2C Communications Functions

Section

4-3

Communications Switch

The CPM2A’s communications are controlled by the communications switch on

Setting

the front of the CPU Unit and the CPM2C’s communications are controlled by

the DIP switch on the front of the CPU Unit.

CPM2A Communications Switch Setting

When the communications switch is set to OFF, communications through the pe-

ripheral port and RS-232C port are governed by the settings in the PC Setup.

When the communications switch is set to ON, communications through the pe-

ripheral port and RS-232C port are governed by the standard Host Link settings

(1 start bit, 7 data bits, 2 stop bits, even parity, and 9,600 bps baud rate).

Note When a Programming Console is connected to the peripheral port, communica-

tions with the Programming Console are unaffected by either the communica-

tions switch or PC Setup.

Communications switch

Peripheral port

RS-232C port

An RS-232C Adapter is needed to perform Host Link communications from a

peripheral port.

239

CPM2A/CPM2C Communications Functions

Section

4-3

CPM2C DIP Switch Settings

When SW2 is set to OFF, communications through the peripheral port are set to

Programming Console protocol, regardless of the setting of pin 1 or the settings

in the PC Setup.

Front View

CPU Unit with Relay Out-

CPU Unit with Transistor Outputs

puts via Terminal Block

via Fujitsu-compatible Connector

4. Status indicators

6. Output indicators

7. Communications port

DIP switch for Units

5. Input indicators

with 10/20 I/O points

8. Communications switch

9. Customize switch

2. Input terminals

2. Input connector

3. Output terminals

3. Output connector

(8)

(9)

CPU Unit with Transistor Outputs

via MIL Connector

4. Status indicators

6. Output indicators

DIP switch for Units

7. Communications port

with 32 I/O points

5. Input indicators

8. Communications switch

9. Customize switch

(8)

2. Input connector

3. Output connector

(9)

When SW 2 is set to ON, the status of SW 1 determines whether communica-

tions through the peripheral port and RS-232C port are governed by the settings

in the PC Setup or the standard settings (1 start bit, 7 data bits, 2 stop bits, even

parity, and 9,600 bps baud rate).

SW1

Communications settings

OFF

The communications settings for the peripheral port and RS-232C

port will be determined by the settings in the PC Setup (DM 6645 to

DM 6649, DM 6650 to DM 6654). If a Programming Console is

connected to the peripheral port, however, operation for that port will

be in the Programming Console mode.

The communications settings for the peripheral port and RS-232C

port will be the standard settings. If a Programming Console is

connected to the peripheral port, however, operation for that port will

be in the Programming Console mode.

An RS-232C Adapter is needed to perform Host Link communications from a

peripheral port.

Note When performing host link communications via the peripheral port of a CPU Unit

with a manufacturing number of 3180O or earlier (i.e., manufactured on or

before April 31, 2000), set SW2 to ON. See above for details of the settings of

SW2. When using a CPU Unit with a manufacturing number of 3180O or earlier

(i.e., manufactured on or before April 31, 2000), do not change the setting of

SW2 with a Programming Console, the CPM2C-CIF01/11, or the

CQM1-CIF01/02 connected. If the setting of SW2 is changed in this state, com-

munications will be interrupted, and a communications error will be generated or

the Programming Console will enter a “no-response” state (i.e., pressing the

keys of the Programming Console will have no effect and the display will stay the

same).

240

CPM2A/CPM2C Communications Functions

Section

4-3

Connecting the Cables

This section describes RS-232C connections.

One-to-one Connections

The RS-232C port on the Host Link computer and the RS-232C port on the

CPM2A/CPM2C or CPM1-CIF01 RS-232C Adapter are connected as shown in

the following diagram when there is no CTS control on the RS-232C port. With

the CPM2C, the CPM2C-CN111 and CS1W-CN118 connecting cables can be

used in place of the RS-232C Adapter.

IBM PC/AT or compatible

RS-232C port

Signal Pin No.

Signal

Pin No.

Hood

One-to-N Connections

Set the DIP switch on the NT-AL001 RS-232C/RS-422 Conversion Adapter.

Normally ON

ON when the Unit is at the end of the transmission path. OFF in all other cases.

Used as a 4-conductor method. (Both switches set to OFF)

According to RS-232C CTS control (5: OFF, 6: ON)

The RS-232C port with the NT-AL001 RS-232C/RS-422 Conversion Adapter

and the RS-232C port of the CPM2A/CPM2C or CPM1-CIF01 RS-232C Adapter

are connected as shown in the following diagram when there is no CTS control

on the RS-232C port. A power supply of 5 VDC is supplied to the

RS-232C/RS-422 Conversion Adapter. With the CPM2C, the CPM2C-CN111

and CS1W-CN118 connecting cables can be used in place of the RS-232C

Adapter.

NT-AL001 RS-232C/RS-422

Conversion Adapter

RS-232C port

Signal Pin No.

Hood

Note Do not connect external devices other than the NT-AL001 Conversion Adapter

to the 5 VDC power supply of pin number 6 on the CPM2A/CPM2C’s RS-232C

port. Doing so may result in damage to the CPM2A/CPM2C or to the external

device.

241

CPM2A/CPM2C Communications Functions

Section

4-3

PC Setup

The PC Setup settings that are required depend on whether a peripheral port or

an RS-232C port is used.

Settings for RS-232C Port

Note If SW1 on the front panel of the CPU Unit is ON, the RS-232C port will operate

with the default settings regardless of the settings in DM 6645 to DM 6649.

Word

Bit

Function

Setting

DM 6645

00 to 03

Port settings

Match host

0: Standard (1 start bit, 7-bit data, 2 stop bits, even parity, 9,600 bps; Host

parameters

Link unit number: 0)

1: Settings in DM 6646

(Other settings will cause a non-fatal error, the default setting will be used,

and AR 1302 will turn ON.)

04 to 07

CTS control settings

0 or 1

0: Disable; 1: Set

08 to 11

Link words for 1:1 PC Link

Any

0: LR 00 to LR 15; Other: Not effective

12 to 15

Communications mode

0: Host Link (default setting); 1: RS-232C (no-protocol); 2: 1:1 PC Link Slave;

3: 1:1 PC Link Master; 4: 1:1 NT Link

(Other settings will cause a non-fatal error, the Host Link setting will be used,

and AR 1302 will turn ON.)

DM 6646

00 to 07

Baud rate:

Match host

parameters

00: 1,200 bps 01: 2,400 bps 02: 4,800 bps 03: 9,600 bps 04: 19,200 bps

08 to 15

Frame format

Start Length Stop Parity

00:

Even

01:

Odd

02:

None

03:

Even

04:

Odd

05:

None

06:

Even

07:

Odd

08:

None

09:

Even

10:

Odd

11:

None

(Other settings will cause a non-fatal error, the default settings (03) will be

used, and AR 1302 will turn ON.)

DM 6647

00 to 15

Transmission delay (Host Link)

0000 to 9999

0000 to 9999 (BCD): Set in units of 10 ms, e.g., setting of 0001 equals 10 ms

(Other settings will cause a non-fatal error, the default setting (0000) will be

used, and AR 1302 will turn ON.)

DM 6648

00 to 07

00 to 31 (BCD): Node number (Host Link)

00 to 31

(Other settings will cause a non-fatal error, the default setting (00) will be

used, and AR 1302 will turn ON.)

08 to 11

Start code enable (RS-232C)

Any

0: Disable; 1: Use start code in DM 6649.

12 to 15

End code enable (RS-232C)

Any

0: Disable (number of bytes received)

1: Use end code in DM 6649.

2: CR, LF

(Other settings will cause a non-fatal error, the disable setting will be used,

and AR 1302 will turn ON.)

242

CPM2A/CPM2C Communications Functions

Section

4-3

Word

Bit

Function

Setting

DM 6649

00 to 07

Start code (01 to FF)

Any

(No-protocol, effective when bits 8 to 11 of DM 6648 are set to 1.)

00 to 15

No. of bytes of data received

Any

(No-protocol, effective when bits 12 to 15 of DM 6648 are set to 0.)

00: 256 bytes

01 to FF: 1 to 255 bytes

End code (00 to FF)

(No-protocol, effective when bits 12 to 15 of DM 6648 are set to 1.)

Settings for Peripheral Port

Word

Bit

Function

Setting

DM 6650

00 to 03

Port settings

Match host

0: Standard (1 start bit, 7-bit data, 2 stop bits, even parity, 9,600 bps; Host

parameters

Link unit number: 0)

1: Settings in DM 6651

(Other settings will cause a non-fatal error, the default setting (0) will be

used, and AR 1302 will turn ON.)

04 to 11

Not used

12 to 15

Communications mode

0: Host Link or peripheral bus; 1: No-protocol

(Other settings will cause a non-fatal error, the Host Link setting (0) will be

used, and AR 1302 will turn ON.)

DM 6651

00 to 07

Baud rate

Match host

parameters

00: 1,200 bps, 01: 2,400 bps, 02: 4,800 bps, 03: 9,600 bps, 04: 19,200 bps

08 to 15

Frame format

Start Length Stop Parity

00:

Even

01:

Odd

02:

None

03:

Even

04:

Odd

05:

None

06:

Even

07:

Odd

08:

None

09:

Even

10:

Odd

11:

None

(Other settings will cause a non-fatal error, the default settings (03) will be

used, and AR 1302 will turn ON.)

DM 6652

00 to 15

Transmission delay (Host Link)

0000 to 9999

0000 to 9999 (BCD): Set in units of 10 ms.

(Other settings will cause a non-fatal error, the default setting (0000) will be

used, and AR 1302 will turn ON.)

Note

1. If SW1 on the front panel of the CPU Unit is ON, the peripheral port will oper-

ate with the default settings regardless of the settings in DM 6645 to

DM 6649.

2. When connecting a computer running Support Software via the peripheral

bus, turn OFF SW1 on the front panel of the CPU Unit and set DM 6650 to

0001 (Host Link). The CPU Unit will automatically switch to peripheral bus

communications for the serial communications port.

243

CPM2A/CPM2C Communications Functions

Section

4-3

Word

Bit

Function

Setting

DM 6653

00 to 07

Node number (Host Link)

00 to 31

00 to 31 (BCD)

(Other settings will cause a non-fatal error, the default setting (03) will be

used, and AR 1302 will turn ON.)

08 to 11

Start code enable (Peripheral port)

Any

0: Disable

1: Use start code in DM 6654.

12 to 15

End code enable (Peripheral port)

Any

0: Disable (number of bytes received)

1: Use end code in DM 6654.

2: CR, LF

(Other settings will cause a non-fatal error, the disable setting (0) will be

used, and AR 1302 will turn ON.)

DM 6654

00 to 07

Start code

Any

(Peripheral port, effective when bits 08 to 11 of DM 6653 are set to 1.)

01 to FF (Hex)

08 to 15

No. of bytes of data received

Any

(Peripheral port, effective when bits 12 to 15 of DM 6653 are set to 0.)

00: 256 bytes

01 to FF: 1 to 255 bytes

End code (00 to FF)

(Peripheral port, effective when bits 12 to 15 of DM 6653 are set to 1.)

244

CPM2A/CPM2C Communications Functions

Section

4-3

Issuing Commands from

This example shows a BASIC program that reads the status of the CPM2A/

a Host Computer

CPM2C’s inputs in IR 000. For more details see 4-5 Host Link Commands.

An FCS (frame check sequence) check isn’t performed on the received re-

sponse data in this program.

Be sure that the host computer’s RS-232C port is configured correctly before

executing the program.

1000 ’ ----------------------------------------------------------------------

1010 ’ CPM2A/CPM2C Sample Program for BASIC

1020 ’

1050 ’ ----------------------------------------------------------------------

1060 ’ ---Set value RS-232C SPEED:9600BPS,PARITY:EVEN,DATA:7,STOP:2---

1070 OPEN ”COM:E73” AS

1080 *REPEAT

1090

---Transmission data input-----------------------------------------------

1100 INPUT

” send data

: ”,send$

1110 ’ ---FCS Calculation-----------------------------------------------

1120 FCS=0

1130 FOR IFCS = 1 TO LEN ( send$ )

1140

FCS = FCS XOR ASC( MID$ ( SEND$ , IFCS , 1 ) )

1150 NEXT

1160 FCS$ = RIGHT$ ( ”0” + HEX$ ( FCS ) , 2 )

1170 ’ ---Communications execute-----------------------------------------------

1180 ZZZ$ = SEND$ + SCS$ + ”*” + CHR$(13)

1190 PRINT

#1 , ZZZ$ ;

1200 ’ ---Response check-----------------------------------------------

1210 RECCNT = 0 : TMP$ - ””

1220 *DRECLOOP

1230 IF LOC ( 1 ) < > 0 THEN *DREC1

1240 RECCNT = RECCNT + 1

1250 IF RECCNT = 5000 THEN *DRECERR ELSE *DRECLOOP

1260 *DREC1

1270 TMP$ = TMP$ + INPUT$ ( LOC (1 ) , #1 )

1280 IF RIGHT$ ( TMP$ , 1 ) = CHR$ (13) THEN *DRECEND ELSE RECCNT = 0 : GOTO *

DRECLOOP

1290 *DRECERR

1300 TMP$ = ” No response !! ” + CHR$ ( 13 )

1310 *DRECEND

1320 PRINT ” receive data : ” ; RECV$

1340 ’ ---Go to transmission data input----------------------------------------

1350 GOTO *REPEAT

1360 ’ ---Processing complete-----------------------------------------------

1370 CLOSE

1380 END

245

CPM2A/CPM2C Communications Functions

Section

4-3

The unsolicited Host Link communications are executed using TXD(48).

Ladder Program

(Mnemonics)

Mnemonic

Control

Contents

(@)TXD(48)

Communications port

Reads data from I/O memory and transmits

output

it in the specified frame format.

Host Link communications are controlled with the following AR area flags.

Word

Bit(s)

Contents

AR 08

00 to 03

RS-232C Port Error Code

0: Normal completion

1: Parity error

2: Frame error

3: Overrun error

RS-232C Communications Error Flag

ON: RS-232C port communications error occurred

OFF: Normal

RS-232C Transmit Ready Flag

ON: The PC is ready to transmit data.

08 to 11

Peripheral Port Error Code

0: Normal completion

1: Parity error

2: Frame error

3: Overrun error

Peripheral Port Communications Error Flag

ON: Peripheral port communications error occurred.

Peripheral Port Transmit Ready Flag

ON: The PC is ready to transmit data.

Unsolicited Communications

A data transmission to the host computer is initiated by the PC.

(@)TXD(48)

S: Leading address of data to be transmitted

C: Control data

^N N: Number of bytes to be transmitted (BCD: 0001 to 0061)

Communications port

0: RS-232 port; 1: Peripheral port

When Host Link communications are being used, TXD(48) converts the N-bytes

of data starting at S to ASCII, adds the Host Link header, FCS, and terminator,

and transmits this data as a Host Link frame.

The transmitted Host Link frame will be as shown in the following diagram.

Converted to ASCII.

N bytes

Node No.

Data (ASCII)

↵

246

CPM2A/CPM2C Communications Functions

Section

4-3

In the following program example TXD(48) is used to transmit data from an

RS-232C port to a host computer. If AR 0805 (the RS-232C Transmit Ready

Flag) is ON when IR 00100 turns ON, the ten bytes of data (DM 0100 to

DM 0104) will be transmitted to the host computer, leftmost bytes first.

(48)

Leading address of data to be transmitted

RS-232C port specification

10 bytes

4-3-2

No-protocol Communications

Overview

When no-protocol communications are used, data can be exchanged with serial

devices such as bar code readers and serial printers using TXD(48) and

RXD(47). No-protocol communications can be used with either an RS-232C

port or peripheral port.

CPM2A Connections

CPM2A CPU Unit

RS-232C devices

Bar code reader

Serial printer

Other

RS-232C port

CPM2A CPU Unit

CPM1-CIF01 RS-232C Adapter

(CTS control cannot be used.)

RS-232C devices

Bar code reader

Serial printer

Other

Peripheral port

CPM2A CPU Unit

CQM1-CIF01/02 RS-232C Adapter

RS-232C devices

(CTS control cannot be used.)

Bar code reader

Serial printer

Other

Peripheral port

247

CPM2A/CPM2C Communications Functions

Section

4-3

CPM2C Connections

CPM2C CPU Unit

RS-232C devices

Bar code reader

Serial printer

Other

Note A CPM1-CIF01 RS-232C Adapter can also be used for no-protocol communica-

tions through the peripheral port, or for a CPM2C, a CPM2C-CIF01 Peripheral/

RS-232C Adapter Unit can be used to connect to external devices. Refer to the

CPM2C Operation Manual for details.

Transmission Data Configuration

When no-protocol communications are used, TXD(48) is used to send data and

RXD(47) to receive data. The maximum amount of data that can be either sent or

received is 259 bytes, including the start and end codes.

No Start or End Code:

Data (Specified No. of bytes)

Only a Start Code:

Data (Specified No. of bytes)

Only an End Code:

Data (256 bytes max.)

Both a Start and End Code:

Data (256 bytes max.)

End Code of CR, LF:

Data (256 bytes max.)

Start Code 00-FF/End Code CR,LF:

Data (256 bytes max.)

Note

1. The start and end codes are set in DM 6648 to DM 6649 (RS-232C) or

DM 6653 to DM 6654 (peripheral port) in the PC Setup.

2. When there are several start or end codes in the transmission, the first of

each will be effective.

3. When the end code is accidentally duplicated in the transmission data and

the transmission is stopped part way through, use CR and LF as the end

code.

4. The start and end codes themselves are not transmitted and received.

Transmission Flags

When sending data from the CPM2A/CPM2C, check that the Transmission En-

able Flag is ON for executing TXD(48). The Transmission Enable Flag will turn

248

CPM2A/CPM2C Communications Functions

Section

4-3

OFF while the data is being transmitted and will turn ON again when transmis-

sion is complete.

After the CPM2A/CPM2C has received data, the Receive Enable Flag turns ON.

When RXD(47) is executed, the data received will be written to the specified

words and the Reception Complete Flag will turn OFF.

Flag

Peripheral port

RS-232C port

Transmit Ready Flag

AR 0813

AR 0805

Reception Completed Flag

AR 0814

AR 0806

Note The CPM2A/CPM2C starts and completes data reception at the following

points:

Reception Start:

Start code disabled:

Continually available for reception

Start code enabled:

After start code is received

Reception Complete:

When either the end code, the specified no. of bytes, or 256 bytes are received.

Application Procedure

Setting the Communications switch

Set the CPM2A CPU Unit’s communications switch or

the CPM2C CPU Unit’s DIP switch.

Connecting the cables

Make the RS-232C connection with the serial device.

Ladder program

Communications Switch

The CPM2A’s communications are controlled by the communications switch on

Setting

the front of the CPU Unit and the CPM2C’s communications are controlled by

the DIP switch on the front of the CPU Unit.

CPM2A Communications Switch Setting

Turn OFF the Communications switch when using no-protocol communications.

No-protocol communications will not be possible if the communications switch is

ON.

Communications switch

Peripheral port

RS-232C port

249

CPM2A/CPM2C Communications Functions

Section

4-3

Note An RS-232C adapter is required for no-protocol communications on the periph-

eral port.

CPM2C DIP Switch Settings

Turn OFF pin 1 of the DIP switch when using no-protocol communications so

that communications through the RS-232C port are governed by the settings in

the PC Setup (DM 6645 to DM 6649).

Front View

CPU Unit with Relay Out-

CPU Unit with Transistor Outputs

puts via Terminal Block

via Fujitsu-compatible Connector

4. Status indicators

6. Output indicators

7. Communications port

DIP switch for Units

5. Input indicators

with 10/20 I/O points

8. Communications switch

9. Customize switch

2. Input terminals

2. Input connector

3. Output terminals

3. Output connector

(8)

(9)

CPU Unit with Transistor Outputs

via MIL Connector

4. Status indicators

7. Communications port

6. Output indicators

DIP switch for Units

with 32 I/O points

5. Input indicators

8. Communications switch

9. Customize switch

(8)

2. Input connector

3. Output connector

(9)

Pin settings

RS-232C port communications

Pin 1

OFF

Governed by the PC Setup

(DM 6645 to DM 6649)

Governed by standard settings

Note An RS-232C Adapter is needed to perform no-protocol communications through

the peripheral port.

Connecting the Cables

This section describes RS-232C connections.

The RS-232C port on the serial device and the RS-232C port of the CPM2A/

CPM2C or CPM1-CIF01 RS-232C Adapter are connected as shown in the fol-

250

CPM2A/CPM2C Communications Functions

Section

4-3

lowing diagram. With the CPM2C, the CPM2C-CN111 and CS1W-CN118 con-

necting cables can be used in place of the RS-232C Adapter.

RS-232C port

Signal Pin No.

Serial device RD (receive data)

Serial device SD (send data)

Serial device SG (signal ground)

Hood

PC Setup

The PC Setup settings that are required depend on whether a peripheral port or

an RS-232C port is used.

Settings for RS-232C Port

Word

Bit

Function

Setting

DM 6645

00 to 03

Port settings

As required

0: Standard (1 start bit, 7-bit data, 2 stop bits, even parity, 9,600 bps; Host Link

unit number: 0)

1: Settings in DM 6646

(Other settings will cause a non-fatal error, the default setting will be used, and AR

1302 will turn ON.)

04 to07

CTS control settings

0: Disable; 1: Set

08 to 11

Link words for 1:1 PC Link

Any

0: LR 00 to LR 15; Other: Not effective

12 to 15

Communications mode

0: Host Link; 1: No-protocol; 2: 1:1 PC Link Slave; 3: 1:1 PC Link Master; 4: 1:1 NT

Link

(Other settings will cause a non-fatal error, the Host Link setting will be used, and

AR 1302 will turn ON.)

DM 6646

00 to 07

Baud rate

As required

00: 1,200 bps; 01: 2,400 bps; 02: 4,800 bps; 3: 9,600 bps; 04: 19,200 bps

08 to 15

Frame format

Start Length Stop Parity

00:

Even

01:

Odd

02:

None

03:

Even

04:

Odd

05:

None

06:

Even

07:

Odd

08:

None

09:

Even

10:

Odd

11:

None

(Other settings will cause a non-fatal error, the default settings (03) will be used,

and AR 1302 will turn ON.)

DM 6647

00 to 15

Transmission delay (Host Link)

0000 to

0000 to 9999 (BCD): Set in units of 10 ms, e.g., setting of 0001 equals 10 ms

9999

(Other settings will cause a non-fatal error, the default setting (0000) will be used,

and AR 1302 will turn ON.)

251

CPM2A/CPM2C Communications Functions

Section

4-3

Word

Bit

Function

Setting

DM 6648

00 to 07

00 to 31 (BCD): Node number (Host Link)

As required

(Other settings will cause a non-fatal error, the default setting (00) will be used, and

AR 1302 will turn ON.)

08 to 11

Start code enable (RS-232C)

0 or 1

0: Disable; 1: Use start code in DM 6649.

12 to 15

End code enable (RS-232C)

0 to 2

0: Disable (number of bytes received)

1: Use end code in DM 6649.

2: CR, LF

(Other settings will cause a non-fatal error, the default setting (0) will be used, and

AR 1302 will turn ON.)

DM 6649

00 to 07

Start code (00 to FF)

00 to FF

(No-protocol, effective when bits 8 to 11 of DM 6648 are set to 1.)

08 to 15

No. of bytes of data received

00 to FF

(No-protocol, effective when bits 12 to 15 of DM 6648 are set to 0.)

00: 256 bytes

01 to FF: 1 to 255 bytes

End code (00 to FF)

00 to FF

(No-protocol, effective when bits 12 to 15 of DM 6648 are set to 1.)

Note If SW1 on the front panel of the CPU Unit is ON, the RS-232C port will operate

with the default settings regardless of the settings in DM 6645 to DM 6649.

Settings for Peripheral Port

Word

Bit

Function

Setting

DM 6650

00 to 03

Port settings

As required

0: Standard (1 start bit, 7-bit data, 2 stop bits, even parity, 9,600 bps; Host Link

unit number: 0)

1: Settings in DM 6651

(Other settings will cause a non-fatal error, the default setting (0) will be used, and

AR 1302 will turn ON.)

04 to 11

Not used

12 to 15

Communications mode

0: Host Link or peripheral bus; 1: No-protocol

(Other settings will cause a non-fatal error, the Host Link setting will be used, and

AR 1302 will turn ON.)

DM 6651

00 to 07

Baud rate

As required

00: 1,200 bps; 01: 2,400 bps; 02: 4,800 bps; 03: 9,600 bps; 04: 19,200 bps

08 to 15

Frame format

Start Length Stop Parity

00:

Even

01:

Odd

02:

None

03:

Even

04:

Odd

05:

None

06:

Even

07:

Odd

08:

None

09:

Even

10:

Odd

11:

None

(Other settings will cause a non-fatal error, the default settings (03) will be used,

and AR 1302 will turn ON.)

DM 6652

00 to 15

Transmission delay (Host Link)

0000 to

0000 to 9999 (BCD): Set in units of 10 ms.

9999

(Other settings will cause a non-fatal error, the default setting (0000) will be used,

and AR 1302 will turn ON.)

252

CPM2A/CPM2C Communications Functions

Section

4-3

Word

Bit

Function

Setting

DM 6653

00 to 07

00 to 31 (BCD): Node number (Host Link)

As required

(Other settings will cause a non-fatal error, the default setting (00) will be used, and

AR 1302 will turn ON.)

08 to 11

Start code enable (Peripheral port)

0 or 1

0: Disable

1: Use start code in DM 6654.

12 to 15

End code enable (Peripheral port)

0 to 2

0: Disable (number of bytes received)

1: Use end code in DM 6654.

2: CR. LF

(Other settings will cause a non-fatal error, the default setting (0) will be used, and

AR 1302 will turn ON.)

DM 6654

00 to 07

Start code (00 to FF)

00 to FF

(Peripheral port, effective when bits 8 to 11 of DM 6653 are set to 1.)

08 to 15

No. of bytes of data received

00 to FF

(Peripheral port, effective when bits 12 to 15 of DM 6653 are set to 0.)

00: 256 bytes

01 to FF: 1 to 255 bytes

End code (00 to FF)

00 to FF

(Peripheral port, effective when bits 12 to 15 of DM 6653 are set to 1)

Note

1. If SW1 on the front panel of the CPU Unit is ON, the peripheral port will oper-

ate with the default settings regardless of the settings in DM 6645 to

DM 6649.

2. When connecting a computer running Support Software via the peripheral

bus, turn OFF SW1 on the front panel of the CPU Unit and set DM 6650 to

0001 (Host Link). The CPU Unit will automatically switch to peripheral bus

communications for the serial communications port.

Program

The following instructions are used in no-protocol communications.

Mnemonic

Control

Contents

(@)TXD(48)

Communications

Reads data from I/O memory and transmits it in

port output

the specified frame format (the start and end

codes can be enabled/disabled).

(@)RXD(47)

Communications

Receives data in the specified frame format (the

port input

start and end codes can be enabled/disabled)

and stores only the data in I/O memory.

253

CPM2A/CPM2C Communications Functions

Section

4-3

No-protocol communications are controlled with the following AR area flags.

Word

Bit(s)

Contents

AR 08

00 to 03

RS-232C Port Error Code

0: Normal completion;

1: Parity error;

2: Frame error;

3: Overrun error

RS-232C Communications Error Flag

ON: RS-232C port communications error occurred.

OFF: Normal

RS-232C Transmit Ready Flag

ON: The PC is ready to transmit data.

RS-232C Reception Completed Flag

ON: The PC has completed reading data.

RS-232C Reception Overflow Flag

ON: A reception overflow has occurred.

08 to 11

Peripheral Port Error Code

0: Normal completion;

1: Parity error;

2: Frame error;

3: Overrun error

Peripheral Port Communications Error Flag

ON: A peripheral port communications error occurred.

OFF: Normal

Peripheral Port Transmit Ready Flag

ON: The PC is ready to transmit data.

Peripheral Port Reception Completed Flag

ON: The PC has completed reading data.

Peripheral Port Reception Overflow Flag

ON: A reception overflow has occurred.

AR 09

00 to 15

RS-232C Port Reception Counter (4 digits BCD)

AR 10

00 to 15

Peripheral Port Reception Counter (4 digits BCD)

No-protocol Data Transmission

TXD(48) is used to transmit data to RS-232C devices.

(@)TXD(48)

S: Leading address of data to be transmitted

C: Control data

^N N: Number of bytes to be transmitted (BCD: 0001 to 0256)

Storage order

0: Leftmost bytes first 1: Rightmost bytes first

Communications port

0: RS-232C port 1: Peripheral port

When no-protocol communications are being used, TXD(48) transmits N bytes

of data beginning at S.

254

CPM2A/CPM2C Communications Functions

Section

4-3

No-protocol Data Reception

RXD(47) is used to receive data from RS-232C devices.

(@)RXD(47)

D: Leading address for storing reception data

C: Control data

N: Number of bytes to receive (BCD: 0001 to 0256)

Storage order

0: Leftmost bytes first 1: Rightmost bytes first

Communications port

0: RS-232C port 1: Peripheral port

The following program example is for no-protocol communications conducted

through a RS-232C port using TXD(48) and RXD(47) instructions.

If AR 0805 (the RS-232C Transmit Ready Flag) is ON when 00100 turns ON,

then data from DM 0100 to DM 0104 is transmitted from leftmost bytes to right-

most bytes. When AR 0806 (the Reception Completed Flag) turns ON, 256 by-

tes of received data are read and written to DM 0200 from leftmost bytes to right-

most bytes.

00100

DIFU(13)

No-protocol communications start

00101

AR 0805

@TXD(48)

DM 0100

First word holding send data.

#0000

Use the RS-232C port; transmit

data from leftmost bytes to right-

#0010

most bytes.

AR 0806

Transmit 10 bytes.

RXD(47)

DM 0200

First word to store received data.

Use the RS-232C port; store trans-

#0000

mitted data from leftmost bytes to

rightmost bytes.

#0256

Receive 256 bytes.

255

CPM2A/CPM2C Communications Functions

Section

4-3

CPM2C/CPM2C-S 1:1 NT Link Connection

RS-232C port

Connecting Cable

(D-sub 9-pin)

CPM2C CPU Unit

XW2Z-200T (2 m)

RS-232C

port

XW2Z-500T (5 m)

RS-232C connection

CPM2C-CN111 (0.15 m)

OMRON

Programmable

Terminal

CS1W-CN118 (0.1 m)

RS-232C ← peripheral port

RS-422 connection

RS-232C port

CPM2C-CIF01

RS-422 ← peripheral port

NT-AL001

RS-232C Adapter

RS-232C port

CPM2C-CIF11

XW2Z-070T-1 (0.7 m)

XW2Z-200T-1 (2 m)

RS-232C port

CPM2C-CIF21

Note The Programmable Terminal cannot be connected using a peripheral port con-

nection when communicating via a 1:1 NT Link.

Application Procedure

Use the settings in the PC Setup (DM6645 to DM 6649) for

Setting communications.

RS-232C communications.

(Turn OFF the Communications switch on the CPM2A’s CPU

Unit or pin 1 of the DIP Switch on the CPM2C’s CPU Unit.)

Connecting the cables

Connect to a Programmable Terminal.

Communications Switch

The CPM2A’s communications are controlled by the communications switch on

Setting

the front of the CPU Unit and the CPM2C’s communications are controlled by

the DIP switch on the front of the CPU Unit.

257

CPM2A/CPM2C Communications Functions

Section

4-3

CPM2A Communications Switch Setting

Turn OFF the communications switch when using 1:1 NT Link communications.

One-to-one NT Link communications will not be possible if the communications

switch is ON.

Communications switch

OFF

RS-232C port

CPM2C DIP Switch Settings

Turn OFF pin 1 of the DIP switch when using 1:1 NT Link communications so that

communications through the RS-232C port are governed by the settings in the

PC Setup (DM 6645 to DM 6649).

Front View

CPU Unit with Relay Out-

CPU Unit with Transistor Outputs

puts via Terminal Block

via Fujitsu-compatible Connector

4. Status indicators

6. Output indicators

7. Communications port

DIP switch for Units

5. Input indicators

with 10/20 I/O points

8. Communications switch

9. Customize switch

2. Input terminals

2. Input connector

3. Output terminals

3. Output connector

(8)

(9)

CPU Unit with Transistor Outputs

via MIL Connector

4. Status indicators

6. Output indicators

DIP switch for Units

7. Communications port

with 32 I/O points

5. Input indicators

8. Communications switch

9. Customize switch

(8)

2. Input connector

3. Output connector

(9)

Pin settings

RS-232C port communications

Pin 1

OFF

Governed by the PC Setup

(DM 6645 to DM 6649)

Governed by standard settings

258

SYSMAC CPM1/CPM1A/CPM2A/CPM2C/SRM1(–V2). Programmable Controllers (2001) - page 3