FANUC Series 30i-MODEL B, 31i-MODEL B, 32i-MODEL B. MAINTENANCE MANUAL

B-64485EN/01

2.CONTROL UNIT HARDWARE

LED display

Rear view

LINK(green)

COM(yellow)

ALM2

BSRDY

DNV8(green)

(red)

(green)

DNV9(green)

DNV5(green)

(1) HSSB status

LED

Meaning

Lights when this board is normally connected to the control unit and communication is

BSRDY (green)

enabled.

ALM2 (RAME ⋅ red)

Indicates a common RAM error. It is likely that the display control board may be defective.

(2) Ethernet status

Name

Meaning

LINK (green)

Turned on when a connection is made with the hub correctly.

COM (yellow)

Turned on when data is transferred.

(3) Others (green LED)

Name

Meaning

DNV5 (LEDP)

Turned on when power is supplied to the GUI card.

DNV8 (LED2)

Indicates the operation status of the personal computer function.

DNV9 (LED1)

Indicates the operation status of the personal computer function.

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2.CONTROL UNIT HARDWARE

B-64485EN/01

Specifications of Inverter board and fan adapter board

Name

Specification

Remark

Inverter board

For 10.4” LCD (working also as fan adapter

A20B-8200-0662

board)

For 12.1” LCD

A14L-0143-0003

For 15” LCD

A14L-0168-0001

㪝㪸㫅㩷㪸㪻㪸㫇㫋㪼㫉㩷㪹㫆㪸㫉㪻

For 10.4” LCD (working also as fan adapter

Works also as the inverter

board)

board mentioned above.

For 12.1” LCD

A20B-8200-0669

For 15” LCD

㪚㫆㫅㫅㪼㪺㫋㫀㫆㫅㩷㪺㪸㪹㫃㪼㩷㪹㪼㫋㫎㪼㪼㫅㩷㫋㪿㪼㩷For 12.1” LCD

A660-4042-T075#L90R00

㪻㫀㫊㫇㫃㪸㫐㩷㪺㫆㫅㫋㫉㫆㫃㩷㪹㫆㪸㫉㪻㩷㪸㫅㪻㩷㫋㪿㪼㩷

For 15” LCD

A660-4042-T076#L75R00

㫀㫅㫍㪼㫉㫋㪼㫉㩷㪹㫆㪸㫉㪻

Details of the inverter board

(1) For display unit with 10.4” LCD

Display control board

Inverter board

10.4”LCD unit

(Also functions as a fan adapter board.)

CA132

CP1

CN1

(2) For display unit with 12.1” LCD

Display control board

Fan adapter board

CA132

CN1

12.1”LCD unit

Inverter board

CA134

CN2

CN1

Inverter connection cable

CN3

(3) For display unit with 15” LCD

Display control board

Fan adapter board

CA132

CN1

15”LCD unit

Inverter board

CA134

CN02

CN01

Inverter connection cable

CN03

CN04

CN05

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2.CONTROL UNIT HARDWARE

B-64485EN/01

(3) For display unit with 15” LCD

Inverter board

Fan adapter board

Rear view

Connecting the display unit to the control unit

For the display unit, place the rotary switch to 0 (initial setting).

Connection mode

Rotary switch setting

Default

Reserve

1 to F

NOTE

Do not set the rotary switch to the Reserve position.

Backup unit specification

Name

Specification

Remark

Backup board

A20B-2100-0820

See Subsection 2.4.3, “Bacuup Unit”.

2.6

HARDWARE OF OPTIONAL BOARDS

2.6.1

Fast Ethernet Board

Specification

Name

Specification

Remark

Fast Ethernet board

A20B-8101-0770

NOTE

The Ethernet board may be used for the data server and FL-net functions as well

as the Ethernet functions depending on parameter setting.

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2.CONTROL UNIT HARDWARE

B-64485EN/01

In the following explanations, the LED lighting states are expressed as follows:

□: Off

■: On

☆: Blinking

LED display transition for STATUS (power on state)

LED

Status

Meaning

display

□

Power-off

■

Immediately after power-on

Initial state entered immediately after power-on.

If the board is stopped in this condition, the cause is one of the

following:

→ The CNC communication software may not be running

normally. Check whether the communication software is

installed properly.

→ The hardware may be faulty. Replace this board.

☆

Start completion

The board has started normally.

LED display transition for STATUS (during normal operation)

LED

Status

Meaning

display

☆

Normal status

The board is operating normally.

LED display for LCOM

LED

Status

Meaning

display

□

Not connected to hub

The board is not connected to the hub properly.

The LED stays off also when the power to the hub is off.

Check whether the board is connected to the hub properly.

■

Connected to hub

The board is connected to the hub.

☆

Transmission/reception in

Data is being transmitted or received.

progress

LED display for COL

LED

Status

Meaning

display

□

Normal status

The board is operating normally.

■

Collision occurs.

The LED is on or blinks at short intervals when the Ethernet

☆

(Data collision occurs.)

communication traffic (communication amount) is high or

ambient noise is high.

LED display for HER

LED

Status

Meaning

display

□

Normal status

The board is operating normally.

■

Error detected in the hardware

The cause may be a failure in this board or a malfunction due

☆

Error detected in the software

to noise.

2.6.2

Additional axis board

Specification

Name

Specification

Remark

Additional axis board

A20B-8101-0740

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B-64485EN/01

2.CONTROL UNIT HARDWARE

Connector and LED mounting location and LED display

COP10A

FSSB_OP (green)

Connector number

Application

COP10A

For FSSB interface

LED display

LED

Meaning

FBBS_OP (green)

ON: FSSB connected

2.6.3

HSSB interface board

Specification

Name

Specification

Remark

HSSB interface board

A20B-8101-0111

Connector and LED mounting location and LED display

LEDR

(red)

BRDYA

(green)

Connector number

Application

COP21N

For HSSB interface

LED display

LED

Meaning

LEDR

Turned on when a common RAM parity error occurs in this board.

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B-64485EN/01

2.CONTROL UNIT HARDWARE

LED display and their meanings

PROFIBUS-DP master interface

CN1

㪣㪜㪛㪉

㪣㪜㪛㪈

NOTE

The face plate is indicated with dotted line.

LED display

Name

Color

Description

Indicates that the CPU on this board has started running.

LED1

Green

On: RESET has been released, allowing the CPU to start running.

The LED is turned off when the power is turned on.

Indicates whether communication is being normally carried out.

On: Communication is being normally carried out.

LED2

Green

Off: Communication is not being carried out.

The LED is turned off when the power is turned on.

㩷

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2.CONTROL UNIT HARDWARE

B-64485EN/01

PROFIBUS-DP slave board

CN2

㪣㪜㪛㪙㩷㪣㪜㪛㪊㪣㪜㪛㪉㪣㪜㪛㪈

NOTE

The face plate is indicated with dotted line.

LED display

Name

Color

Description

Indicates that the CPU on this board has started running.

LED1

Green

On: RESET has been released, allowing the CPU to start running.

The LED is turned off when the power is turned on.

Indicates that communication has started.

On: Communication has started.

LED2

Green

The LED is turned off when the power is turned on or if:

No parameter data and configuration data have been received.

Invalid parameter data and configuration data have been received.

Indicates whether communication is being normally carried out.

On: Communication is being normally carried out.

LED3

Green

Off: Communication is not being carried out.

The LED is turned off when the power is turned on.

Indicates that a RAM parity alarm condition has occurred on this board.

On: A RAM parity alarm condition has occurred.

LEDB

Red

The LED is turned off when the power is turned on. Once it has been turned on, it

stays on until the power is turned off.

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2.CONTROL UNIT HARDWARE

B-64485EN/01

LED display and their meanings

DeviceNet master board

This board provides four green LEDs and one red LED for status indication. In addition, the internal

daughter board has two LEDs that emit red and green light.

Name

Color

Meaning

LED0 to 3

Green

Indicates the activation state of the DeviceNet application software.

LEDWD

Red

Indicates an error on the daughter board.

Red / green

Indicates the module status, which is the status of the local node.

Indicates the network status, which is the status of the entire network including the

Red / green

local node.

In the following explanations, the LED lighting states are expressed as follows:

□: Off

■: On

☆: Blinking

◇: Don’t care

LED display transition for LED0, LED1, LED2, and LED3 (during power-on)

LED

Status after power-on

Action when stopped after power-on

3 2 1 0

□□□□

Power-off

■■■■

After power-on, the DeviceNet application

The DeviceNet application software is not running

software does not start.

normally. Check whether the software is installed

properly.

□□□□

Initializing the firmware on the daughter

Replace the DeviceNet master board.

board.

□□□■

Checking memory on the daughter board.

□□■□

Recognizing the firmware on the daughter

board.

□□■■

Reading DeviceNet parameters.

Confirm that DeviceNet master function (software option)

has been purchased.

□■□□

Verifying that DeviceNet parameter

Set DeviceNet parameter “NETWORK” to “ONLINE.”

“NETWORK” is set to “ONLINE.”

□■□■

Setting the bus parameter in DeviceNet

Replace the DeviceNet master board.

parameters.

□■■□

Setting the slave parameter in DeviceNet

Set the slave parameter in DeviceNet parameters

parameters.

correctly. If there is no problem with the setting, replace

the DeviceNet master board.

□■■■

Checking duplicate MAC IDs.

Check duplication with the MAC ID of a slave device.

Check if cables are connected correctly.

Check if power for communication is correctly supplied.

Check if slave devices are turned on.

■□□□

The DeviceNet application software has

been initialized and I/O communication

starts.

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B-64485EN/01

2.CONTROL UNIT HARDWARE

LED display for LED1, LED2, LED3, and LED4 (when abnormality occurs)

LED

Status

Meaning

3 2 1 0

□□□□

Daughter board failure

The daughter board failed.

↑↓

Replace the DeviceNet master board.

■■■■

(Repetition)

LED display for LEDWD

LED display

Status

Meaning

■

Daughter board failure

The daughter board failed.

Replace the DeviceNet master board.

LED display of MS and NS (during normal operation)

LED display

Status

Meaning

MS □

Immediately after power-on

The MPU on the daughter board is being reset.

NS □

MS ☆ green

Initializing

The firmware on the daughter board is making a initialization.

NS □

MS ■ green

Checking duplication of

The firmware on the daughter board is checking duplicated MAC IDs.

NS □

MAC IDs

MS ■ green

I/O communication stopped

The firmware on the daughter board is stopping I/O communication.

NS ☆ green

MS ■ green

I/O communication in

The firmware on the daughter board is successfully performing I/O

NS ■ green

advance

communication.

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2.CONTROL UNIT HARDWARE

B-64485EN/01

LED display of MS and NS (during occurrence of an error)

LED display

Status

Error and action

MS ☆ red

Daughter board failure

A MAC ID or communication rate setting error occurred or the

NS ◇

daughter board failed. When the setting is correct, replace the

DeviceNet master board.

MS ■ red

Daughter board failure

The daughter board failed.

NS □

Replace the DeviceNet master board.

MS ◇

Duplicate MAC IDs

MAC IDs are duplicate.

NS ■ red

Verify the following:

→ MAC IDs are not duplicate by check the MAC IDs of all nodes.

Busoff detection

Communication stopped because a communication error occurred

frequently.

Verify the following:

→ The communication rates of all nodes are set to the same value.

→ The cable length is appropriate.

→ The cable is not loose or broken.

→ A terminal is placed on only both ends of the main line.

→ There is not much noise.

MS ◇

Network power failure

Power for communication is not supplied. Verify the following:

NS □

→ Power for communication is properly supplied.

Transmission error

Transmission is not completed successfully.

Verify the following:

→ All slaves are turned on.

→ There is no other master on the network.

→ The communication rates of all nodes are set to the same value.

→ The cable length is appropriate.

→ The cable is not loose or broken.

→ A terminal is placed on only both ends of the main line.

→ There is not much noise.

MS ◇

Slave not present

No slaves are present.

NS ☆ red

Verify the following:

→ The slave is turned on.

→ The communication rates of all nodes are set to the same value.

→ The cable length is appropriate.

→ The cable is not loose or broken.

→ A terminal is placed on only both ends of the main line.

→ There is not much noise.

Slave I/O size mismatch

The slave I/O size setting does not match the setting of the actual

slave.

Verify the following:

→ The slave I/O size setting matches the setting of the actual slave.

I/O communication error

I/O communication timed out.

Verify the following:

→ The communication rates of all nodes are set to the same value.

→ The cable length is appropriate.

→ The cable is not loose or broken.

→ A terminal is placed on only both ends of the main line.

→ There is not much noise.

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B-64485EN/01

2.CONTROL UNIT HARDWARE

DeviceNet slave board

This board provides four green LEDs (LED0 to LED3) and one red LED (LEDWD) for status indication.

In addition, there are two LED sets (MS and NS) that consist of one red LED and one green LED.

Name

Color

Meaning

LED0 to 3

Green

Indicates the activation state of the DeviceNet application software.

LEDWD

Red

Indicates an error on the DeviceNet slave board.

Green

Indicates the module status, which is the status of the local node.

Red

Green

Indicates the network status, which is the status of the entire network including the

Red

local node.

In the following explanations, the LED lighting states are expressed as follows:

□: Off

■: On

☆: Blinking

◇: Don’t care

？：Undefined

LED display transition for LED0, LED1, LED2, and LED3

LED

Status and cause when stopped after

Action when stopped after power-on

3 2 1 0

power-on

□□□□

Power-off

■■■■

After power-on, the DeviceNet application

The DeviceNet application software is not running

software does not start. Or, the DeviceNet

normally. Check whether the software is installed

slave function (software option) is

properly.

disabled.

Or, confirm that the DeviceNet slave function (software

option) has been purchased.

□□□□

Initializing the firmware.

Replace the DeviceNet slave board.

□□□■

Firmware has been initialized.

□□■□

A line baud rate check is in progress.

Check the status of communication with the DeviceNet

□□■■

Checking duplication of MAC IDs

master.

□■□□

Waiting for I/O communication to be

A network power failure may also occur. Check

whether the power for communication is supplied

established.

properly.

□■□■

I/O communication is normal.

If the system does not recover from the error, replace

□■■□

I/O communication has timed out.

the DeviceNet slave board.

□■■■

I/O communication is idle.

LED display for LEDWD

LED display

Status

Meaning

■

Board failure

The DeviceNet slave board failed.

Replace the DeviceNet slave board.

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2.CONTROL UNIT HARDWARE

B-64485EN/01

LED display of MS and NS (during normal operation)

In the “during normal operation” status, when communication is normally established, a transition to the

“I/O communication normal” status is made.

LED display

Status

Meaning

MS □ green

Immediately after power-on

The onboard firmware is being initialized when the onboard

MS □ red

MPU is in the reset status or reset release status.

NS □ green

NS □ red

MS ■ green

Communication under

The onboard firmware performs processing in the order below.

MS □ red

preparation

(1) Waits for the DeviceNet application software to be

NS □ green

initialized.

NS □ red

(2) Checks the baud rate.

(3) Checks MAC ID duplication.

MS ■ green

Waiting for I/O communication to

Each status corresponds to DeviceNet MPU status transition.

MS □ red

be established.

NS ☆ green

NS □ red

MS ■ green

I/O communication is normal.

MS □ red

NS ■ green

NS □ red

MS ◇ green

I/O communication has timed

MS ◇ red

out.

NS ■ green

NS ☆ red

NOTE

When a transition to the "I/O communication normal" status is not made, confirm

that the power for communication is correctly supplied because a network power

failure may have occurred.

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B-64485EN/01

2.CONTROL UNIT HARDWARE

LED display of MS and NS (during occurrence of an unrecoverable failure)

In the "during occurrence of an unrecoverable failure" status, once an error occurred, recovery is not

performed unless this slave station is powered off and back on again.

LED

LED display

Status

Error and action

3 2 1 0

MS ◇ green

■□□□

Duplicate MAC IDs

Check the following and then turn the slave

MS ◇ red

↑↓

power off and back on again.

NS □ green

□□■□

→ MAC IDs are not duplicate by check the MAC

NS ■ red

(Repetition)

IDs of all nodes.

■□□□

Busoff detection

Check the following and then turn the slave

↑↓

power off and back on again.

□□■■

→ The communication rates of all nodes are set

(Repetition)

to the same value.

→ The cable length is appropriate.

→ The cable is not loose or broken.

→ A terminal is placed on only both ends of the

main line.

→ There is not much noise.

MS □ green

■□□□

Board failure

The DeviceNet slave board failed.

MS ■ red

↑↓

Replace the DeviceNet slave board.

NS ◇ green

□？？？

NS ◇ red

(Repetition)

MS ◇ green

□□□□

An unrecoverable failure

Contact FANUC.

MS ◇ red

↑↓

occurred on the CNC

NS ◇ green

■■■■

side.

NS ◇ red

(Repetition)

2.6.6

CC-Link Board

Specification

Name

Specification

Remark

CC-Link remote device station board

A20B-8101-0551

Connector and LED mounting location

CC-Link remote device station board

LED

Outside line

connector

Face plate

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2.CONTROL UNIT HARDWARE

B-64485EN/01

LED display and their meanings

CCC-Link remote device station board

This board provides three green LEDs and one red LED for status indication.

Name

Color

Off

RUN

Green

Online

Offline

Green

Sending data.

Not sending data.

Green

Channel carrier detected.

Channel carrier error.

ERROR

Red

CRC error detected.

Communicating normally.

In the usual, normal communication state, the on/off states of the LEDs are as follows:

Name

On/off state

RUN

Blinking

ERROR

Off

NOTE

If the number of units on the network is small, SD blinks at high speed, and it

may appear on not insteading of blinking to the human eye.

LED indicators in the event of an error

In any of the following LED states, check the settings as listed in the table below.

□: Off

■: On

☆: Blinking

◇: Don’t care

LED

Meaning of the state

Check item

RUN

ERR

Cable connection

Terminating resistors

◇

☆

•

A CRC error occurred.

Measures against noise

Baud rate

•

Data destined to the local station

Settings of the master station

■

□

■

□

cannot be received from the master

station.

□

☆

■

□

•

The master station is not link-started.

Settings of the master station

Cable connection

□

■

□

•

Data cannot be received.

Measures against noise

Settings of the master station

•

The cable is disconnected.

Cable connection

□

•

The master station is not turned on.

Settings of the master station

Check item

What to check

•

The cable is not connected.

•

The cable and the connector are connected together correctly.

Cable connection

•

The cable is not bend forcibly.

•

The inter-slave station distance is correct.

•

Terminating resistors are connected to both ends of the cable.

Terminating resistors

•

The terminating resistors match the cable type.

Measures against noise

•

Each unit is grounded.

Baud rate

•

The same baud rate is set for the master and slave stations.

•

The master station is turned on.

Settings of the master station

•

The master station is operating normally.

•

The settings of the master station are made correctly.

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2.CONTROL UNIT HARDWARE

2.7

ENVIRONMENTAL REQUIREMENTS OUTSIDE THE

CABINET

2.7.1

Environmental Conditions outside the Cabinet

The control unit and the peripheral units have been designed on the assumption that they are housed in

closed cabinets. In this manual "cabinet" refers to the following:

• Cabinet manufactured by the machine tool builder for housing the control unit or peripheral units;

• Operation pendant, manufactured by the machine tool builder, for housing the display unit, MDI unit,

or operator's panel.

• Equivalent to the above.

The following table lists the environmental conditions required in installing these cabinets.

Operating

0°C to 45°C

Ambient

Nonoperating (including storage

temperature of

-20°C to 60°C

and transportation)

the cabinet

Temperature change

0.3°C/minute or less

Normal

75%RH or less, no condensation

Humidity

Short period (less than 1 month)

95%RH or less, no condensation

Operating

0.5G or less

Vibration

Nonoperating (including storage

1.0G or less

and transportation)

Operating

Up to 1000 m^{(see Note 1 in the Subsec. 2.7.2.)}

Meters above

Nonoperating (including storage

sea level

Up to 12000 m

and transportation)

Normal machine shop environment

(The environment must be considered if the cabinets are in a

Environment

location where the density of dust, coolant, organic solvent,

and/or corrosive gas is relatively high.)

2.7.2

Installation Conditions of the Control Unit

LCD-mounted type control

Stand-alone type control

Condition

unit and display unit

unit

Operating

0°C to 58°C

0°C to 55°C

Ambient

Nonoperating (including storage

-20°C to 60°C

temperature

and transportation)

Temperature change

0.3°C/minute or less

Normal

75%RH or less, no condensation

Humidity

Short period (less than 1 month)

95%RH or less, no condensation

0.5G or less

FANUC’s evaluation test was conducted under the following

conditions complying with IEC 60068-2-6.

Operating

10 to 58Hz: 0.075mm (amplitude)

Vibration

58 to 500Hz: 1G

Direction of vibration: Each of the X, Y, and Z directions

Number of sweep cycles: 10

Nonoperating (including storage

1.0G or less

and transportation)

Operating

Up to 1000m^{(Note 1)}

Meters above

Nonoperating (including storage

sea level

Up to 12000m

and transportation)

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2.CONTROL UNIT HARDWARE

B-64485EN/01

LCD-mounted type control

Stand-alone type control

Condition

unit and display unit

unit

Coolant, lubricant, or cutting chips shall not be sprinkled

Environment

directly over the CNC or servo unit. No corrosive gas shall be

allowed.

NOTE

1 If the control unit is installed 1000 m or higher above sea level, the allowable

upper ambient temperature of the control unit in the cabinet is changed as

follows. Assume that the allowable upper ambient temperature of the control unit

in the cabinet installed 1000 m or higher above sea level decreases by 1.0°C for

every 100 m rise in altitude.

Example)

When a control unit whose required operating ambient temperature range is

0°C to 55°C is installed 1750 m above sea level:

55°C-(1750m-1000m)/100m × 1.0°C = 47.5°C

Therefore, the allowable ambient temperature range is from 0°C to 47.5°C.

2 When using a unit having additional installation conditions, be sure to meet also

these conditions.

2.8

CAUTIONS RELATED TO GROUNDING AND NOISE

The cabinet and pendant box generally have measures against electrical shocks and noise, such as

connecting grounding wires and separating cables on routing, in them. If you removed grounding wires

from the cabinet or pendant box, for example, in replacing a control or peripheral unit in the cabinet or

pendant box or if you temporarily changed the way other cables are laid or bound, basically restore their

original state of connection after maintenance work. Otherwise, it is likely that an electrical shock or

noise may result and the unit may malfunction.

This section describes the concept of cable separation, a noise suppresser as a measure against noise,

cable clamping and shield processing, and a lightning surge absorber.

2.8.1

Separating Cables

The cables used for the CNC machine tool are classified as listed in the following table. The cables in

each group must have been subjected to treatment stated in the Action column.

Table 2.8.1 Cable grouping

Group

Signal line

Action

Primary AC power line

Bind the cables in group A separately ^{(Note 1)} from

Secondary AC power line

groups B and C, or cover group A with an

AC/DC power lines (containing the power lines

electromagnetic shield ^{(Note 2)}.

for the servo and spindle motors)

See Subsection 2.8.2 and connect spark killers or

AC/DC solenoid

diodes with the solenoid and relay.

AC/DC relay

DC solenoid (24 VDC)

Connect diodes with the DC solenoid and relay.

DC relay (24 VDC)

Bind the cables in group B separately from group

DI/DO cable between the I/O unit and power

A, or cover group B with an electromagnetic

magnetics cabinet

shield.

DI/DO cable between the I/O unit and machine

Separate group B as far from group C as

possible.

24 VDC input power cables connected to the

It is desirable to apply shield processing

control unit and its peripherals

described in Subsection 2.8.3.

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2.CONTROL UNIT HARDWARE

Group

Signal line

Action

I/O Link i or I/O Link cable

Bind the cables in group C separately from group

Cable for the position coder

A, or cover group C with an electromagnetic

Cable for the manual pulse generator

shield.

Separate group C as far from group B as

Cable for the MDI^{(Note 3)}

possible.

RS-232C interface cable

Be sure to perform shield processing as

Cable for the battery

described in Subsection 2.8.3.

Cable for the Ethernet

Other cables for which shield processing is

specified

NOTE

Binding the cables in one group separately from another means that the groups

are placed 10 cm or more apart from one another.

Covering a group with an electromagnetic shield means that shielding is

provided between groups with grounded steel plates.

The shield is not required when the cable for the MDI is no more than 50 cm in

length.

CAUTION

Select a cable with a proper length. If the cable is too long, the noise immunity

may be reduced or noise may be caused on other cables. In addition, when the

excess length is coiled, the inductance is increased and a high voltage is

induced during turning on or off of signals. This may cause a failure or a

malfunction due to noise.

Cabinet

Pendant box

24VDC

Spindle

Servo

I/O

Control

Unit

amplifier

unit

receiving

power

Unit

supply

voltage

Duct

Shielding

To motor

plate

and the like

Cable of group A

Cable of group B, C

Section of duct

Group A

Group B, C

Shielding plate

Fig. 2.8.1 Cable layout example

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2.CONTROL UNIT HARDWARE

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2.8.2

Noise Suppressor

A noise suppressor must be installed as a measure against noise that may occur in actuators such as

solenoids and relays used in the power magnetics cabinet.

Because an actuator, which converts electrical energy to mechanical action, is an inductive load, it

resonates with the parasitic capacitance in a circuit containing it, when it works on and off, thus

generating intermittent arcs accompanied by abrupt voltage rises and falls at its contacts, hence

electromagnetic waves interfering with electronics circuits. As a remediation measure, treat the inductive

load as described below.

While referencing the processing for cable groups A and B described in Subsection

2.8.1,

“Separating Signal Lines”, apply a CR snubber circuit and a diode, respectively, to an inductive load

in an AC circuit and that in a DC circuit.

When selecting a CR snubber or diode, observe the following cautions.

Cautions for selecting and using a CR snubber

• Use a CR snubber in an AC circuit.

A varistor, voltage clamping element, can limit the peak of an oscillating voltage waveform but

cannot relax an abrupt voltage transition . For this reason, we recommend using a CR snubber rather

than the varistor.

• Determine the rating of the resistor and capacitor in the CR snubber according to the steady-state

current I (A) and DC resistance RL (Ω) of the inductive load as follows:

CR snubber resistance: R ≅ RL

(Ω)

CR snubber capacitance:

≤

(μF)

• Place the CR snubber close to the inductive load to minimize its wiring.

Inductive load (such as relay䋩

CR snubber

Motor

General-purpose induction motor

Fig. 2.8.2 (a) Example of applying a CR snubber

Cautions for selecting and using a diode

• A diode (freewheeling diode) can be used as a noise suppressor for a DC driver circuit.

• Determine the ratings of the diode according to the drive voltage and current for the inductive load

(such as a solenoid coil, relay, or motor) as follows:

Voltage rating: Approximately twice the voltage applied to the inductive load

Current rating: Approximately twice the steady-state current flowing through the inductive load

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2.CONTROL UNIT HARDWARE

• Place the diode close to the inductive load in order to minimize its wiring.

Inductive load (such as a relay䋩

Diode

Fig. 2.8.2 (b) Example of applying a diode

2.8.3

Cable Clamp and Shield Processing

Each cable leading into this control unit, servo amplifiers, or spindle amplifiers that requires shielding so

as to suppress external noise has been clamped (basically signal cables require shield clamps). So when

the cable replaced by a new one, confirm that the shield processing complies with following

requirements.

Partially peel the sheath off each of such cables and expose the shield, and press the exposed portion

against a ground bar with a clamp. Care should be taken so that the ground bar and shield have a surface

contact in a larger area.

The ground bar for the cable clamp must be installed as shown in Fig. 2.8.3 (a).

When the multipoint grounding scheme is used, care should be taken so that the ground bar for the shield

clamp and cabinet are connected at low impedance by, for example, preventing the cabinet side contact

surface from being coated.

When using an in-line connector or the like to split a cable, it is necessary to connect the shield of one

portion of the cable and that of the other portion and to keep the total impedance of the two cable portions

from becoming high. Even if the connector is placed at the inlet of the cabinet, it is also necessary to use

the shield for the intra-cabinet portion of the cable all the way to the other end of the cable.

Ground bar for shield clamp

Cable

Metal fittings

for clamp

Fig. 2.8.3 (a) Cable clamp (1)

NOTE

Bundle and clamp the shields of cables that lead into the control unit or amplifier

at a point, respectively, close to the unit or amplifier.

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2.CONTROL UNIT HARDWARE

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Control unit

Cabinet

Ground bar for shield clamp

Metal fittings for clamp

Shield

Fig. 2.8.3 (b) Cable clamp (2)

Prepare a ground bar for cable clamping shown below.

Ground terminal

(grounded)

Hole for securing metal

fitting clamp

Mount screw hole

Fig. 2.8.3 (c) Ground bar for shield clamp (outline drawing)

The ground bar for cable clamping must be made of a steel plate at least 2 mm thick and plated with

nickel.

Ground bar for shield clamp

(Unit: mm)

Fig. 2.8.3 (d) Ground bar for shield clamp (hole arrangement and dimension drawing)

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2.CONTROL UNIT HARDWARE

Max. 55

Reference)

(Unit: mm)

Fig. 2.8.3 (e) Clamping metal fixture (outline drawing)

Ordering specification for metal fittings for clamp

A02B-0303-K001 (8 pieces)

2.8.4

Lightning Surge Absorber

A lightning surge absorber installed between input power lines and between input power lines and the

ground might be effective to protect units from lightning voltage surges. However, installing a surge

absorber does not always ensure protection from lightning surges. How to install the lightning surge

absorber is explained below.

Installation procedure

The surge-absorbing elements used for measures against surges due to lightening must be installed in the

input power unit as shown in the figure below. The figure below shows an example in which an insulating

transformer, shown by dotted lines, is not installed. If an insulating transformer is installed,

surge-absorbing element 2 (between line and ground) is not required.

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2.CONTROL UNIT HARDWARE

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To control power input for control unit

Circuit

24 VDC power and control power

breaker

supply input of Power Supply for

(MCCB)

servo amplifier

To main circuit

Circuit

Insulating

Circuit

Magnetic

input

contactor

power input of

breaker

transformer

breaker

reactor

Power Supply for

(MCCB)

servo amplifier

Circuit

breaker

(5A,MCCB)

To other electric parts on the machine

Surge-absorbing element 1

(between lines)

Surge-absorbing element 2

(between line and ground)

Fig. 2.8.4 Example of installing lightning surge absorbers on 200 VAC lines

CAUTION

1 For a better surge absorbing effect, the wiring shown by heavy line must be as

short as possible.

Wire size : Cross-sectional area at least 2 mm² large

Wire length: The sum of the length (a) of the wire for the connection of

surge-absorbing element 1 and that (b) of surge-absorbing element

2 must be 2 m or less.

2 If conducting dielectric strength tests by applying overvoltages (1000 VAC and

1500 VAC) to the power line, remove surge-absorbing element 2. Otherwise, the

overvoltages would activate the element.

3 The circuit breaker (5A) is a short circuit protection of lines if the surge-absorbing

elements result in short circuit breakdown due to the absorption of an excessive

amount of energy.

NOTE

The circuit breaker (5A) can be used also for other electric parts on the machine

because no current flows through surge-absorbing elements 1 and 2 in the

normal state. The “other electric parts on the machine” can be the control power

supply of Power Supply for servo unit and the power supply for the fan motor for

a spindle motor.

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3.REPLACING CONTROL UNIT MAINTENANCE PARTS

3 REPLACING CONTROL UNIT

MAINTENANCE PARTS

3.1

CAUTIONS FOR REPLACEMENT

WARNING

Only those personnel who have received approved safety and maintenance

training may perform this replacement work. When opening the cabinet and

replacing the board, be careful not to touch the high-voltage circuits (marked

with

and fitted with an insulating cover). If you touch any uncovered

high-voltage circuit, you will get an electric shock.

Before exchanging, be sure to shut off externally supplied power. Otherwise,

electrical shocks, breakdown, and blowout may occur.

If a control unit is turned off but other units are not, it is likely that power may be

supplied to servo units, resulting in the units being damaged and workers getting

an electrical shock when the units are exchanged.

In order to prevent damage that may be caused by static electricity, wear a

grounding wrist strap or take a similar protective measure before starting to

touch a printed-circuit board or unit or attach a cable.

Static electricity from human bodies can damage electrical circuits.

Voltage lingers in servo and spindle amplifiers for a while even after power has

been turned off, resulting in workers possibly getting an electrical shock when

the workers touch them. Before starting to exchange these amplifiers, wait for 20

minutes after power has been turned off.

When replacing a unit, ensure that the new unit has the same parameters and

settings as the old one. (For details, refer to the manual for the machine.)

Otherwise, unpredictable machine movement could damage the workpiece or

the machine itself or cause injury.

If you notice an apparent hardware fault, such as abnormal noise, abnormal

odor, smoke, ignition, or abnormal heat, in the hardware while power is being

supplied to it, shut it off at once. These faults can cause fire, breakdown,

blowout, and malfunction.

The radiating fins of control units, servo amplifiers, spindle amplifiers, and other

devices can remain very hot for a while after power has been turned off, making

you get burned if you touch them. Before starting to work on them, wait and

make sure they are cool.

When exchanging heavy stuff, you should do so together with two or more

people.

If the replacement is attempted by only one person, the old or new unit could slip

and fall, possibly causing injury.

Be careful not to damage cables. Otherwise, electrical shocks can occur.

10 When working, wear suitable clothes with safety taken into account. Otherwise,

injury and electrical shocks can occur.

11 Do not work with your hands wet. Otherwise, electrical shocks and damage to

electrical circuits can occur.

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3.REPLACING CONTROL UNIT MAINTENANCE PARTS

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NOTE

The LCD (liquid-crystal display) has been fabricated using an extreme precision

technology. However, some of their pixels may fail to light or stay constantly

lighting because of their characteristics. Please be forewarned that these

phenomena are not faults.

3.1.1

Optional Information File

This control unit supports the “FANUC Remote Option System”. Optional parameters are held as an

optional information file (named “OPRM INF”) in FROM

Cautions for optional information file restoration

When making a backup copy of SRAM data and user files, make a backup copy also of an optional

information file (named “OPRM INF”) in FROM. The optional information file is needed when the

optional information must be restored, for example, because of it having been damaged.

Once the optional information file is restored, alarm PS5523 “OPTION AUTHENTICATION WAIT

STATE” is issued at power-on, indicating that the optional parameters must be authenticated by the

FANUC service department within the period of validity (within 30 days since the occurrence of the

alarm). Alarm PS5523 can be canceled by a reset within the period of validity. Contact the FANUC

service department for information about the authentication procedure.

3.1.2

Attaching and Detaching Units

LCD-mounted type control units, display units, MDI units, and main panel machine operator's panels, can

be categorized into two types in terms of the way they are mounted. One of the types is fixed using M4

nuts through the rear surface of the unit, and the other type is fixed using M3 screws through the front

surface of the unit. The front surface-mount type units use screw caps for covering the screw holes in its

corners.

When attaching the M3-fixed type unit mentioned above to, or detaching it from, a cabinet, follow the

procedure below while paying attention to the screw caps.

Slot

Detaching

Pull out the screw cap from the screw hole in each corner by inserting a precision screwdriver (flat

blade) into the slot in the screw cap head.

Remove the screw which appeared each screw cap was detached to detach the unit.

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3.REPLACING CONTROL UNIT MAINTENANCE PARTS

Attaching

Fasten the unit by inserting a screw into the screw hole in each corner. Tighten the screws with an

appropriate torque.

Cover each screw hole with a screw cap while making sure that all the screw caps are oriented in

such a way that their slots face in the respective directions shown in the figure. Push in each screw

cap until they become flush with the surface of the unit.

NOTE

The ordering information for the screw caps is as follows:

A02B-0319-K190: A set of 100 screw caps

A02B-0319-K191: A set of 5 screw caps

3.1.3

Tightening Torque for Fastening Units and Ground Terminals

The following table lists the tightening torque for screws and nuts used to fasten the units (except those

having molded mounting parts) explained herein and ground terminals in the units.

Screw and nut diameter

Tightening torque

0.8 to 1.0 N⋅m

1.6 to 2.0 N⋅m

The following table lists the tightening torque for screws and nuts used to fasten those units having

molded mounting parts, such as stand-alone control units and separate detector interface units.

Screw and nut diameter

Tightening torque

1.1 to 1.5 N⋅m

2.4 to 2.8 N⋅m

CAUTION

Be sure to observe the rules listed above when tightening screws. If screws are

tightened too weakly or too strongly, it is likely that the unit may drop, break, or

malfunction.

For units having a touch panel in particular, be sure to observe the above rules.

Failing to observe them can cause the touch panel to malfunction.

NOTE

For units having different installation conditions specified herein, observe them

first.

3.1.4

Packing

Each FANUC-supplied unit, such as a display or operator’s panel, has been designed on the assumption

that they will be mounted using packing and with the specified screw tightening torque. Failing to mount

them as specified can lead to unit damage and/or malfunction. Be sure to use packing and observe the

specified screw tightening torque. When replacing the packing, do so neatly so that no coolant will get in

the unit after replacement. Observe the following precaution when attaching the packing.

When making screw holes in packing, be careful not to cut to the edge of the packing. Any extra cut can

let coolant get in the cabinet through the screw hole, causing trouble.

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FANUC Series 30i-MODEL B, 31i-MODEL B, 32i-MODEL B. MAINTENANCE MANUAL - page 9