FANUC Series 16 / 160 / 18 / 180 – Model B. Maintenance Manual

8. TROUBLESHOOTING

B-62445E/03

Main CPU

Manual pulse generator

)

MPG (JA3)

MPG

Pulse coder

(2)*

ENCn (JFn)

(3)

SCALEn (JF2n)

Linear scale

n : Axis

number

APCBAT (JA4A)

BAT

6V (1.5V x 4)

(d) If AlM does not light by power on of NC, any of load connected

(1) to

(3) may be faulty. Check whether grounding or

short-circuiting exists or not. If it is present, replace the

appropriate part or cable.

(4) Short-circuiting within the controller (PCB may be faulty)

Power is supplied to PCBs through the back panel.

Check it by the steps below :

1) Remove a PCB in a slot and turn on power, then confirm lightening

of LED ALM. Repeat this operation to each PCB.

2) When ALM does not light at power on with a PCB removed, the

PCB may be faulty.

Note

Perform an operation with a PCB removed within

minutes, otherwise data in memory may be lost.

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8.3

NO MANUAL OPERA-

TION NOR AUTOMAT-

IC OPERATION CAN

BE EXECUTED

Points

(1) Execute the following procedure when no manual nor automatic

operation is done

(2) Check whether position display shows correct position

(3) Check CNC status display

(4) Check CNC internal status using diagnostic function

Causes and

Countermeasures

1. Position display

(1) Check CNC status display (Refer to 2.10 NC STATUS DISPLAY

(relative, absolute,

FOR DETAIL)

machine coordinate)

(a) Emergency stop status (Emergency stop signal is turned on)

does not change

If status display shows

EMG

the emergency stop signal is input.

Check the following signal using the PMC’s diagnostic function

(PMCDGN).

When built-in I/O card is used.

X1008

*ESP

G0008

*ESP

ESP=0 indicates that emergency stop signal is input.

When built-in I/O card is not used.

X1008

*ESP

G0008

*ESP

ESP=0 indicates that emergency stop signal is input.

(b) It is a reset status

When RESET is displayed, any of a reset is functioned. Check the

following signal using the PMC’s diagnostic funciton

(PMCDGN).

An input signal from the PMC functions

G0008

ERS

RRW

When ERS is 1, external reset signal is input.

When RRW is 1, reset & rewing signal is input.

RESET key on the MDI keyboard functions

When the signals in (1) are 0,

RESET

key may be functioning.

Check the contact of

RESET

key using a tester.

When it is abnormal, change the keyboard.

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8. TROUBLESHOOTING

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Operation mode status is displayed on the lower part of CRT as

follows :

If nothing is displayed, mode select signal is not input. Check mode

select signal using PMC’s diagnostic function (PMCDGN).

For details, refer to section 1.7 STATUS DISPLAY.

(Example of display)

JOG : Manual operation (JOG) mode

HND : Manual handle (MPG) mode

MDI : Manual data input (MDI) mode

MEM : Automatic operation (Memory) mode

EDIT: EDIT (Memory edit) mode

G0043

MD4

MD2

MD1

↓

Manual operation (JOG) mode

Manual handle (MPG) mode

Manual data input (MDI) mode

Automatic operation (Memory) mode

EDIT (Memory edit) mode

(2) Check diagnostic data 000 to 025 of the CNC Check an item for which

1 is displayed

No. Message

Display

000

WAITING FOR FIN SIGNAL

: 0

001

MOTION

: 0

002

DWELL

: 0

a.003

IN-POSITION CHECK

: 0

004

FEEDRATE OVERRIDE 0%

: 0

b.005INTERLOCK / START LOCK

: 1

006SPINDLE SPEED ARRIVAL CHECK (Example)

: 0

010PUNCHING

: 0

011READING

: 0

012WAITING FOR (UN) CLAMP

: 0

c.013JOG FEEDRATE OVERRIDE 0%

: 0

d.014WAITING FOR RESET, ESP, RRW OFF

: 0

015EXTERNAL PROGRAM NUMBER SEARCH

: 0

Items with a to d relate with manual and automatic operation and its

detail is shown below.

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8.TROUBLESHOOTING

a. In-position check is

It shows that positioning is not yet completed. Check the contents of the

being done

following diagnostic number. (It is 1 in the following condition)

DGN 0300

Position Error

>PARAM 1826

In-positio width

Check the parameters according to the parameter list

1825

Servo loop gain per axis

(Normal : 3000)

Servo system may be abnormal. Refer to servo alarm 400, 410, and

411.

b. Interlock or start lock

There are a plural interlock signals. Check at first which interlock signal

signal is input

is used by the machine tool builder at the parameters shown below.

3003

DIT

ITX

ITL

#0 ITL=0 shows interlock signal *IT is effective. To (1)

#2 ITX=0 shows interlock signal *ITn is effective. To (2)

#3 DIT=0 shows interlock signal "MITn is effective. To (3)

Check state of effective interlock signals using the diagnostic function

(PMCDGN) of the PMC.

Interlock signal (*IT) is input

G0008

*IT

*IT=0 shows that interlock signal is input.

Axis interlock signal (*ITn) is input

G0130

*IT8

*IT7

*IT6

*IT5

*IT4

*IT3

*IT2

+IT1

*ITn=0 shows interlock signal is input.

Interlock signal per axis and direction (+/- MITn) is input

G0132

+MIT4

+MIT3

+MIT2

+MIT1

G0134

-MIT4

-MIT3

-MIT2

-MIT1

"MITn=1 shows interlock signal per axis and direction is input.

c. Jog feedrate override is

Check the signals using PMC’s diagnostic function (PMCDGN)

G0010

*JV7

*JV6

*JV5

*JV4

*JV3

*JV2

*JV1

*JV0

G0011

*JV15

*JV14

*JV13

*JV12

*JV11

*JV10

*JV9

*JV8

When the override is 0% all bits of the above address becomes

1111

1111 or 0000

0000.

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8. TROUBLESHOOTING

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*JV15

JV0

Override

1111 1111 1111 1111

0.00%

1111 1111 1111 1110

0.01%

1101 1000 1110 1111

100.00%

0000 0000 0000 0001

655.34%

0000 0000 0000 0000

0.00%

d. NC is in a reset state

In this case, RESET is also displayed on the status display. Check it using

the procedure of 1 above.

2. When machine

(1) Machine lock signal (MLK) is input.

coordinate value does

not update on position

display

G0044

MLK

G0108

MLK8

MLK7

MLK6

MLK5

MLK4

MLK3

MLK2

MLK1

MLK : All axes machine lock

MLKn : Each axis machine lock

When the signal is 1, the corresponding machine lock signal is input.

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8.TROUBLESHOOTING

8.4

JOG OPERATION

CANNOT BE DONE

Points

(1) Check whether position display is operating.

(2) Check CNC status display

(3) Check internal status using Diagnostic funciton

Causes and Remedies

1. Position display

(1) Check mode selection status (JOG mode is not selected)

(relative, absolute,

When status display shows JOG, it is normal.

machine cooordinate)

When status display does not show JOG, mode select signal is not

does not change

selected correctly. Confirm the mode select signal using PMC’s

diagnostic function (PMCDGN).

G0043

MD4

MD2

MD1

↓

Manual operation (JOG) mode

(2) Feed axis and direction select signal is not input Check the signal using

PMC’s diagnostic function (PMCDGN).

G0100

+J8

+J7

+J6

+J5

+J4

+J3

+J2

+J1

G0102

-J8

-J7

-J6

-J5

-J4

-J3

-J2

-J1

Example)

When +X button is pressed on the operator’s panel, signal+J1 turns to

This signal is effected at its rise. If axis selection signal is input before

JOG mode is selected, axis movement does not occur. Turn the signal

to off, then on.

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8. TROUBLESHOOTING

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(3) Check CNC’s diagnostic function 000 to 015. Check the items for

which 1 is displayed at right side.

No. Message

Display

000

WAITING FOR FIN SIGNAL

: 0

001

MOTION

: 0

002

DWELL

: 0

003

IN-POSITION CHECK

: 0

004

FEEDRATE OVERRIDE 0%

: 0

005

INTERLOCK / START LOCK (Example)

: 1

006

SPINDLE SPEED ARRIVAL CHECK

: 0

010

PUNCHING

: 0

011

READING

: 0

012

WAITING FOR (UN) CLAMP

: 0

013

JOG FEEDRATE OVERRIDE 0%

: 0

014

WAITING FOR RESET, ESP, RRW OFF

: 0

015

EXTERNAL PROGRAM NUMBER SEARCH

: 0

Items with a to d relate with manual and automatic operation and its

detail is shown below.

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8.TROUBLESHOOTING

a. In-position check is

It shows that positioning is not yet completed. Check the contents of the

being done

following diagnostic number. (It is 1 in the following condition)

DGN 0300

Position Error

>PARAM 1826

In-positio width

Check the parameters according to the parameter list

1825

Servo loop gain per axis

(Normal : 3000)

Servo system may be abnormal. Refer to servo alarm 400, 410, and

411.

b. Interlock or start lock

There are a plural interlock signals. Check at first which interlock signal

signal is input

is used by the machine tool builder at the parameters shown below.

PARAM

3003

DIT

ITX

ITL

#0 ITL=0 shows interlock signal *IT is effective. To (1)

#2 ITX=0 shows interlock signal *ITn is effective. To (2)

#3 DIT=0 shows interlock signal "MITn is effective. To (3)

Check state of effective interlock signals using the diagnostic function

(PMCDGN) of the PMC.

Interlock signal (*IT) is input

G0008

*IT

*IT=0 shows that interlock signal is input.

Axis interlock signal (*ITn) is input

G0130

*IT8

*IT7

*IT6

*IT5

*IT4

*IT3

*IT2

+IT1

*ITn=0 shows interlock signal is input.

Interlock signal per axis and direction (+/- MITn) is input

⋅ M series

G0132

+MIT4

+MIT3

+MIT2

+MIT1

G0134

-MIT4

-MIT3

-MIT2

-MIT1

⋅ T series

When an I/O card is used

X1004

-MIT2

+MIT2

-MIT1

+MIT1

When no I/O card is used

X0004

-MIT2

+MIT2

-MIT1

+MIT1

"MITn=1 shows interlock signal per axis and direction is input.

* For the T series, "MITn is valid only for manual operation.

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8. TROUBLESHOOTING

B-62445E/03

c. Jog feedrate override is

Check the signals using PMC’s diagnostic function (PMCDGN)

G0010

*JV7

*JV6

*JV5

*JV4

*JV3

*JV2

*JV1

*JV0

G0011

*JV15

*JV14

*JV13

*JV12

*JV11

*JV10

*JV9

*JV8

When the override is 0% all bits of the above address becomes

1111

1111 or 0000

0000.

*JV15

JV0

Override

1111 1111 1111 1111

0.00%

1111 1111 1111 1110

0.01%

1101 1000 1110 1111

100.00%

0000 0000 0000 0001

655.34%

0000 0000 0000 0000

0.00%

d. NC is in a reset state

In this case, RESET is also displayed on the status display. Check it using

the procedure of 1 above.

(4) Jog feed rate setting (Parameter) is not correct

1423

Jog feedrate per axis

(5) Manual feed per revolution is selected ( T series)

This funciton feeds an axis synchronized with spindle rotation and

whether this function is used or not is selected by the following

parameter:

1402

JRV

#4 (JRV)

0 : Jog feed is of feed per minute

1 : Jog feed is of feed per revolution

(a) When parameter JRV is set to 1, feed rate of the axis is calculated

by synchronizing with rotation of the spindle. Therefore, rotate the

spindle.

(b) If the axis does not move even when the spindle is rotated, check

the detector of the spindle (position coder) and the cable between

the position coder and the CNC if it is short-circuited or

ungrounded.Refer to 2.4 for connection diagram.

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8.TROUBLESHOOTING

8.5

HANDLE OPERATION

CANNOT BE DONE

Points

(1) Check another manual operation (JOG) is accepted.

(2) Check CNC status display

Causes and

Countermeasure

JOG operation is not

Consult with item 8.3 and 8.4.

acceptable, either

When only handle

(1) Check CNC status display at lower left corner of the CRT

operation (MPG) cannot

(Refer to 1.7 STATUS DISPLAY for details)

be done

When the status display shows HND, mode selection is correct.

If it is not HND, mode select signal is not input correctly. Check the

mode select signal using the PMC’s diagnostic function(PMCDGN).

G0043

MD4

MD2

MD1

↓

Manuale handle mode

(2) Manual handle feed axis select signal is not input

Check the signals using PMC’s diagnostic function (PMCDGN).

G0018

HS2D

HS2C

HS2B

HS2A

HS1D

HS1C

HS1B

HS1A

G0019

HS3D

HS3C

HS3B

HS3A

When axis select switch for manual handle feed is selected on the

machine operator’s panel, if the signals are input as follows, it is

normal.

Selected axis

HSnD

HSnC

HSnB

HSnA

no selection

1st axis

2nd axis

3rd axis

4th axis

5th axis

6th axis

7th axis

8th axis

In the above table, n is the number of the manual pulse generator

(MPG) and up to 3 MPGs can be used.

A feed axis is selected by 4-bit code of A to D.

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8. TROUBLESHOOTING

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(3) Manual handle feed multiplication is not correct

Check the following signals using PMC’s PCDGN. Also confirm the

following parameters based on the parameter list.

G0019

MP2

MP1

↓

MP1

MP2

Multiplication

7113

Magnification of handle feed m(1 - 127)

7114

Magnification of handle feed n(1 - 1000)

7102

HNGx

#0(HNGx) Direction of MPG and travel of machine

0 : same direction

1 : reverse direction

7110

No. of MPGs used

(1 - 3)

(4) Checking manual pulse generator

Check disconnection of cable or short circuit.

(a) Incorrect of cable

Main CPU board

MPG (JA3)

1st MPG

2nd MPG

3rd MPG

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8.TROUBLESHOOTING

Manual pulse

CNC side MPG (JA3)

generator

HA1

(03)

(05)

HA1

1st

HB1

(02)

(06)

HB1

+5V

(09)

(03)

+5V

(12)

(04)

HA2

(03)

(05)

HA2

2nd

HB2

(04)

(06)

HB2

+5V

(18)

(03)

+5V

(14)

(04)

HA3

(05)

HA3

3rd

HB3

(06)

HB3

+5V

(20)

(03)

+5V

(16)

(04)

shield

Connector:half pitch

20pins (HIROSE)

(b) Manual pulse generator is faulty

When you rotate the MPG, the following signal is output.

Measure the signal with synchroscope at screw terminal on back of

MPG. If no signal is output, measure +5V voltage.

Back of MPG

Screw terminal

HA: A phase signal

HB: B phase signal

+5V 0V HA HB

Rotation in plus

Rotation in minus

1:1

+5V

off

+5V

off

1:1

1/4 phase difference

Check on and off ratio and phase difference of HA and HB.

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8. TROUBLESHOOTING

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8.6

AUTOMATIC

OPERATION

CANNOT BE DONE

Points

(1) Check manual operation is possible.

(2) Check the status of cycle start LED on machine operator’s manual.

(3) Check status of CNC.

Causes and Remedies

When manual operation is either impossible, perform countermeasure,

based on the previous item ”Jog operation cannot be done”.

Confirm that a correct mode is selected according to the mode select status

of CNC status display. Also, by confirming the automatic operation

status it is possible to identify cycle operation, feed hold and cycle stop

state.

1. When cycle operation is

”****” is displayed at status display on CRT.

not started (Cycle start

(1) Mode select signal is not correct.

LED does not light)

When the mode select signal is input correctly, following status

display is done.

MDI

:Manual data input mode (MDI)

MEM :Memory operation mode

RMT

:Remote operation mode

If status display does not show a correct status, check the mode signal

with following diagnosis function of PMC side (PMCDGN).

G0043

DNCI

MD4

MD2

MD1

DNCI

MD4

MD2

MD1

Mode select

–

Manual data input mode

Memory operation mode

Remote operation mode

(2) Cycle start signal is not input

This signal turns 1 when cycle start button is pressed and turns 0 when

it is released. The cycle start actuates when it changes from 1 to 0.

Check the state of the signal using PMC’s diagnostic

function(PMCDGN).

G0007

#2 (ST)

: Cycle start signal

(3) Feed hold signal is input

Under normal state, the feed hold signal is 1 when the feed hold button

is not pressed.

Check the state of this signal using the PMC’s diagnostic function

(PMCDGN) .

G0008

*SP

#5 (*SP)

: Feed hold signal

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8.TROUBLESHOOTING

2. When an automatic

CNC’s status display shows “STRT” on the CRT.

operation is in progress

(1) Check the contents of diagnostic nos. 000 to 015.

(Cycle start LED is lit)

No. Message

Display

000

WAITING FOR FIN SIGNAL (Example)

: 1

001

MOTION

: 0

002

DWELL

: 0

003

IN-POSITION CHECK

: 0

004

FEEDRATE OVERRIDE 0%

: 0

005

INTERLOCK / START LOCK

: 0

006

SPINDLE SPEED ARRIVAL CHECK

: 0

010

PUNCHING

: 0

011

READING

: 0

012

WAITING FOR (UN) CLAMP

: 0

013

JOG FEEDRATE OVERRIDE 0%

: 0

014

WAITING FOR RESET, ESP, RRW OFF

: 0

015

EXTERNAL PROGRAM NUMBER SEARCH

: 0

Items with a to i relate with an automatic operation and their details

are as follows :

a. An auxiliary function is

An auxiliary function (M/S/T/B) specified in a program is not ended.

being executed (waiting

Check according to the following procedure.

for FIN signal)

At first, confirm the kind of interface of an auxiliary function.

3001

HSIF

#7(HSIF)

0 : M/S/T/B is of normal interface.

1 : M/S/T/B is of high-speed interface.

(1) Normal interface

When the auxiliary function finish signal turns from 1 to 0, the

auxiliary function is supposed to be ended and the next block is read

for operation. Confirm the status of this signal using PMC’s

diagnostic function(PMCDGN).

G0004

FIN

#3 (FIN)

: Auxiliary function finish signal

(2) High-speed interface

The auxiliary function is supposed to be ended when the signals are

in the following state. Confirm it using PMC’s diagnostic function

(PMCDGN).

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G0005

BFIN

TFIN

SFIN

MFIN

#0(MFIN)

: M function finish signal

#2(SFIN)

: S function finish signal

#3(TFIN)

: T function finish signal

#4(BFIN)

: 2nd auxiliary function finish signal

F0007

#0(MF)

: M function strobe signal

#2(SF)

: S function strobe signal

#3(TF)

: T function strobe signal

#7(BF)

: 2nd auxiliary function strobe signal

G0005

BFIN

TFIN

SFIN

MFIN

#0(MFIN)

: M function completion signal

#2(SFIN)

: S function completion signal

#3(TFIN)

: T function completion signal

#4(BFIN)

: Second auxiliary function completion signal

F0007

#0(MF)

: M function strobe signal

#2(SF)

: S function strobe signal

#3(TF)

: T function strobe signal

#4(BF)

: Second auxiliary function strobe signal

G0004

MFIN3

MFIN2

#4(MFIN2)

: Second M function completion signal

#5(MFIN3)

: Third M function completion signal

G0008

MF3

MF2

#4(MF2)

: Second M function strobe signal

#5(MF3)

: Third M function strobe signal

* The second and third M functions are enabled only when bit 7 (M3B)

of parameter No. 3404 is set to 1.

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8.TROUBLESHOOTING

Signal

End state

Finish signal

store signal

b. Travel command is being

CNC is reading an axis command (X,Y,Z,...) in a program and giving the

executed

command to the axis.

c. A dwell command is

CNC is reading a dwell command (G04) in a program and is executing

being executed

the dwell command.

d. In-position check

Positioning (G00) to a specified position of a specified axis is not

(confirming positioning)

completed.

is being done

Whether positioning is completed or not is checked as the servo position

error amount. Check it CNC’s diagnostic function as follows:

DGN no.300

Position Error

> PARAM 1826

In-position width

Position error amount almost becomes 0, when

positioning of an axis completes and when the amount becomes within

the in-posiiton width, it is assumed that positioning completes and the

next block is exected.

If position error amount does not become within the in-position width,

refer to servo alarm 400, 4n0 and 4n1.

e. Feedrate override is at

Actual feedrate is overridden by the override signals to a programmed

feedrate. Check the override signals using the PMC’s diagnostic function

(PMCDGN).

G0012

*FV7

*FV6

*FV5

*FV4

*FV3

*FV2

*FV1

*FV0

*FVn

:Feedrate override

<2nd override signal (option)>

Feed rate is overridden more finely using the signals below:

See MTB’s manual whether this feature is equipped.

G0013

*AFV7

*AFV6

*AFV5

*AFV4

*AFV3

*AFV2

*AFV1

*AFV0

*AFVn

:2nd feed rate override

*FV7@@@@@@@*FV0

*AFV7@@@@@@*AFV0

1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 0

1 0 0 1 1 0 1 1

100%

1 0 0 1 1 0 1 1

100%

0 0 0 0 0 0 0 0

245%

0 0 0 0 0 0 0 1

245%

0 0 0 0 0 0 0 0

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8. TROUBLESHOOTING

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Interlock signal or start

lock signal is input

Start lock signal is input

G0007

STLK

#1 (STLK)

With this signal being 1, start lock signal is input.

There are a plural number of interlock functions. Parameters are set by

machine tool builders for which interlock function is used.

Therefore, confirm the following parameters at first:

3003

DIT

ITX

ITL

#0 (ITL)

0 : Interlock signal(*IT) is valid.

#2 (ITX)

0 : Interlock signal (*ITn) is valid.

#3 (DIT)

0 : Interlock signal ("MITn) is valid.

Confirm which interlock signal is activated by the PMC’s diagnostic

function (PMCDGN) .

(1) Interlock signal (*IT) is input

G0008

*IT

#0 (*IT)

: When this bit is 0, interlock signal is input.

(2) Interlock signal per each axis (*ITn) is input

G0130

*IT8

*IT7

*IT6

*IT5

*IT4

*IT3

*IT2

*IT1

*ITn

When the bit is 0, the corresponding axis’s interlock signal is input.

(3) Interlock signal per axis and direction(+/- MITn) is input

G0132

+MIT4

+MIT3

+MIT2

+MIT1

↓

G0134

-MIT4

-MIT3

-MIT2

-MIT1

*+MITn

Interlock signal is input to the corresponding axis and direction with the

signal being 0.

(4) Controlled axis detach function is running. A detached axis is

specified for travelling.

*This function is valid when CNC parameter No.1005#7=1. For

whether this function is running or not, confirm the following signal

using PMC’s diagnostic function

(PMCDGN). Check the axis

concerned.

F0110

MDTCH8

MDTCH7

MDTCH6

MDTCH5

MDTCH4

MDTCH3

MDTCH2

MDTCH1

When signal MDTHn is “1” ,the axis detach function is in valid.

The control axis detach function becomes valid by the following

signal issued from the PMC or a CNC side parameter. Check as in the

following procedure :

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8.TROUBLESHOOTING

1) The control axis detach signal (DTCHn) is input.

G0124

DTCH8

DTCH7

DTCH6

DTCH5

DTCH4

DTCH3

DTCH2

DTCH1

If it is 1, the corresponding axis is detached.

2) The following parameter enables the control axis detach function to

the corresponding axis.

0012

RMVx

#7(RMVx)0 : Controlled axis is connected

1 : Controlled axis is detached

g. CNC is waiting for

Actual spindle speed does not arrive at a speed specified in a program.

spindle speed arrival

Confirm the signal state using the PMC’s diagnostic function

signal to be input

(PMCDGN).

G0029

SAR

#4(SAR) : When this signal is 0, spindle speed does not arrive at the specified speed.

This function is valid when PARAM 3708#0=1.

h. Manual feedrate override

Normally manual feedrate override function is used for jog feed.

is 0% (dry run)

But when DRN(dry run) signal turns on during an auomatic

operation,override values set with these signals become valid to the

following speed set by a parameter.

G0046

DRN

#7(DRN) : Dry run signal is input with this signal being 1.

1410

Dry run rate

The rate when the following override value is 100%.

G0010

*JV7

*JV6

*JV5

*JV4

+JV3

*JV2

*JV1

*JV0

↓

G0011

*JV15

*JV14

*JV13

*JV12

+JV11

*JV10

*JV9

*JV8

When override value is 0%, all bits of the above address is

[1111

1111] or [0000

0000].

*JV15 .

JV0

Override

1111 1111 1111 1111

0.00%

1111 1111 1111 1110

0.01%

1101 1000 1110 1111

100.00%

0000 0000 0000 0001

655.34%

0000 0000 0000 0000

0.00%

317

8. TROUBLESHOOTING

B-62445E/03

i. NC is in a reset state

In this case, the CNC’s status display shows RESET. Refer to item 1.

(2) Only rapid traverse in positioning (G00) does not function Confirm

the following parameter and signals from the PMC.

(a) Setting value of rapid traverse rate

1420

Rapid traverse rate per axis

(b) Rapid traverse override signals

G0014

ROV2

ROV1

G0096

HROV

*HROV6

*HROV5

*HROV4

*HROV3

*HROV2

*HROV1

*HROV0

(HROV-0)

(HROV=1)

ROV1

ROV2

Override

*HROV6 *HROV0

Override

100%

1 1 1 1 1 1 1

50%

1 1 1 1 1 1 0

25%

0 0 1 1 0 1 1

100%

1421

Rapid traverse override F0 rate

(3) Only feed (other than G00) does not function

(a) Maximum feed rate set by parameter is incorrect.

1422

Maximum feedrate

Feed rate is clamped at this upper feed rate.

(b) Feed rate is specified by feed per revolution (mm/rev)

Position coder does not rotate

Check the connection between spindle and position coder

The following failure is considered:

⋅

T iming belt is broken

⋅

Key is removed

⋅

Coupling is loose

⋅

Connector of signal cable is loosened

Position coder is faulty

Position coder does not rotate

Check the connection between spindle and position coder

The following failure is considered:

⋅

Timing belt is broken

⋅

Key is removed

⋅

Coupling is loose

⋅

Connector of signal cable is loosened

Position coder is faulty

Position coder is connected to the spindle amplifier when serial

interface spindle is used or connected to the CNC when analog

interface spindle is used.

For details of connection, refer to the following.

318

B-62445E/03

8.TROUBLESHOOTING

Whether A/B phase signals from the position coder are read

correctly, can be judged also by the spindle speed display on the

CRT screen (position screen). (However, it is not displayed

when PARAM 3105#2=0).

Optical I/O

SPDL-x

link adapter

(JA7A,B)

Optical fiber

Serial

· Main CPU

spindle

AC200V

board

· Option 2

JD1

COP1

CN11A

board

1.2

(Note)

Spindle

Position coder or

motor

Built-in sensor

Spindle

Control signal

A-OUTx(JA8A, B)

Serial

AC200V

· Main CPU

spindle

board

· Option 2

board

SPDL-x(JA7A, B)

Spindle

1.2

motor

Position coder

Spindle

319

B-62445E/03

8.TROUBLESHOOTING

8.7

CYCLE START LED

SIGNAL HAS TURNED

OFF

Points

(1) After cycle operation is started, then stopped, check as follows:

(2) Confirm cycle start LED on machine operator’s panel.

(3) Confirm CNC’s diagnostic function

Causes and Remedies

The reason why cycle start LED signal (STL) has turned off are displayed

on CNC’s diagnostic numbers 020 to 025 as follows:

020

CUT SPEED UP/DOWN

021

RESET BUTTON ON

022

RESET AND REWIND ON

023

EMERGENCY STOP ON

024

RESET ON

025

STOP MOTION OR DWELL

a. Emergency stop signal

b. External reset signal

c. Reset button on MDI

d. Reset & rewind signal

e. Servo alarm

Feed hold by switching mode

g. Single block stop

Details of signals a to g are as follows:

Confirm the signals concerned using diagnostic function (PMCDGN).

a. Emergency stop is input

When I/O card is used :

X1008

*ESP

G0008

*ESP

*ESP=0

: Emergency stop signal is input :

When I/O card is not used:

X0008

*ESP

G0008

*ESP

*ESP=0

: Emergency stop signal is input :

321

8. TROUBLESHOOTING

B-62445E/03

b. External reset signal is

input

G0008

ERS

#7(ERS) :

When the bit is 1, external reset signal is input.

This signal is usually used for a confirmation signal of M02 when an M02

is specified in a program as the end of a program.

Therefore, when M02 is executed, this signal is input.

c. Reset button on the MDI

An automatic operation is put into a reset status when RESET key on the

is pressed

MDI panel is pressed.

d. Reset & rewind signal is

input

G0008

RRW

#6(RRW) :

When this signal is 1, the reset & rewind signal is input.

This signal is usually used for a confirmation signal of M30 when an M30

is specified in a program as the end of a program.

Therefore, when M30 is executed, this signal is input.

e. Servo alarm has

When any servo alarm has generated, cycle operation is put into the reset

generated

state and operation stop.

Cycle operation is in a

The cycle operation becomes feed hold state in the following cases:

feed hold state

Modes are switched from an automatic operation mode to a manual

operation mode.

Feed hold signal is input.

G0043

MD4

MD2

MD1

memory edit(EDIT)

Automatic

Automatic operation

operation

(AUTO)

Manual data input (MDI)

Jog feed (JOG)

Manual

Handle/step

operation

TEACH IN HANDLE

TEACH IN JOG

G0008

*SP

#5(*SP) : When this signal is 0, the feed hold signal is input.

g. It become single block

stop during automatic

operation

G0046

SBK

#1(SBK) When this signal is 1, the single block signal is input.

322

B-62445E/03

8.TROUBLESHOOTING

8.8

NOTHING IS

DISPLAYED ON CRT

Points

Check whether it is a trouble of display or a trouble of the system.

Judgement of the point

Check whether the STATUS LED on the main board shows the following

state.

STATUS

f ×

(f : on,

× : off)

If the status shows the above state, the system is normal.

Therefore, display system may be faulty.

If the status shows other state, a hardware other than the display system

may be troublesome.

Causes and remedies

1. When the display system

(1) Confirmation item

is in toruble

Is power supplied to the display?

Is a video signal connected?Isn’t it disconnected? or braked?

(2) Causes and remedies

Power to the display is faulty. (Exchange power supply unit).

Cable connection is faulty. (Correct the connection).

Module is faulty (Exchange CRT control module)

Display is faulty.

323

B-62445E/03

8.TROUBLESHOOTING

A16B-3200-0160

(1)

(2)

(3)

(4) (5) (6) (7)

(8)

(9)

(10)

(11)

<CRT control module mounting position> With CAP-II function>

Option 1 board

A16B-2200-091X

(6)

(1)

(7)

(3)

(5)

Change CRT control module

Specification : A20B-2902-0270X0275

2. When system is in

trouble

STATUS

f ×

(f : on,

× : off)

When STATUS LED on the main board is other than above, check LEDs

on the main CPU board and other optional boards,identify the trouble and

make an appropriate action. See 5.4.2 for LED display.

325

8. TROUBLESHOOTING

B-62445E/03

8.9

ALARM 85 TO 87

(START)

(READER/PUNCHER

INTERFACE ALARM)

YES

Alarm 85?

· Check baud rate

and other I/O pa

rameters

YES

· I/O device is

Alarm 86?

faulty

Is I/O pa-

rameter cor-

rect?

YES

Set correct parameters

OFF

Is power of I/O

Turn on I/O device

Is cable connec-

tion right?

YES

Connect the cable

· I/O device is faulty

· I/O interface

module is faulty

Alarm 87

· I/O device is faulty

· I/O interface mod

ule is faulty

Causes

(a) Parameters on reader/puncher interface are not correct.

Check the following setting data and parameters.

(b) External I/O device or host computer is faulty.

(d) Cable between NC and I/O device is faulty.

Countermeasures

(a) Parameters on reader/puncher interface are not correct.

Check the following setting data and parameters:

PUNCH CODE=0 OR 1 (0: EIA,1:ISO)

Select ISO or EIA according to the type of I/O device.

If punch code does not match, alarm 86 will generate.

326

B-62445E/03

8.TROUBLESHOOTING

Value of param-

eter 0020

Function

Feed

0101#7

0111#7

0121#7

0131#7

Data input code

0101#3

0111#3

0121#3

0131#3

Stop bit

0101#0

0111#0

0121#0

0131#0

Type of I/O device

102

112

122

132

Baud rate

103

113

123

133

Commu-

0135#3

nication

RS-232C

RS-422

method

MAIN CPU BOARD

OPTION-1 BOARD

Connector

JD5A

JD5B

JD5C

JD6A

Numbers in the table indicate parameters and bit numbers.

Example)

101#7:bit7 of parameter 101.

Note

For data communications by RS-422, refer to parameters

134 and 135.

0101

NFD

ASI

SB2

0111

0121

0131

#7(NFD)

0 : Feed is output before and after data in data output (FANUC PPR)

1 : Feed is not output (standard).

#3(ASI)

0 : Data input code is EIA or ISO (automatic recognition)

1 : Data input code is ASCII.

#0(SB2)

0 : No. of stop bits is 1.

1 : No. of stop bits is 2.

0102

Type of I/O device

0112

0122

0132

327

8. TROUBLESHOOTING

B-62445E/03

Value

TYPE OF I/O DEVICE

RS-232-C (control codes DC1 to DC4 are used)

FANUC CASSETTE B1/B2 (bubble cassette)

FANUC CASSETTE F1 (Old type FLOPPY CASSETTE

ADAPTOR)

FANUC PROGRAM FILE Mate,

FANUC FA CARD ADAPTOR

FANUC FLOPPY CASSETTE ADAPTOR,

FANUC SYSTEM P-MODEL H,

FANUC Handy File

Not used

Portable tape reader

FANUC PPR, FANUC SYSTEM P-MODEL G,

FANUC SYSTEM P-MODEL H

0103

Baud rete

0113

0123

Value

Baud rate

4800

0133

600

9600

1200

19200

2400

When bit#3 of parameter no. 0135=1 (RS-422 interface), the following

setting is also available.

Value

Baud rate

38400

76800

86400

Check the following parameters also, when parameter no.0020 is 3.

0134

CLK

NCD

SYN

PRY

#5(CLK)

0 : Internal clock is used for baud rate clock of RS-422 interface.

1 : External clock is used for baud rate clock of RS-422 interface.

#4(NCD)

0 : CD (signal quality detection) of RS-232C interface is checked.

1 : CD (signal quality detection) of RS-232C interface is not checked.

#2(SYN)

0 : In protocol B, NC reset/alarm is not informed to the host.

1 : In protocol B, NC reset/alarm is informed to the host by SYN and

NAK code.

#1(PRY)

0 : No parity bit

1 : With parity bit

328

B-62445E/03

8.TROUBLESHOOTING

0135

RMS

R42

PRA

ETX

ASC

#7(RMS) In protocol A, status of remote / tape operation of SAT command is

0 : Always transmitted by 0.

1 : Transmitted by the contents of remote / tape switching request issued

by SET command from the CNC.

#3(R42)

0 : Interface is of RS-232C.

1 : Interface is of RS-422.

#2(PRA)

0 : Communication protocol is protocol A

1 : Communication protocol is protocol B

#1(ETX)

0 : End code of protocol A or extended protocol A is CR of ASCII/ISO.

1 : End code of protocol A or extended protocol A is ETX of ASCII/ISO.

#0(ASC)

0 : All the communication codes except for NC data is ISO code.

1 : All the communication codes except for NC data is ASCII code.

(b) External I/O device or Host computer is in trouble

(i)

Check whether the setting on communication of external I/O

device or host computer is the same as that of the CNC. (baud

rate, stop bits,etc.) If they are not the same, change the setting.

(ii)

When spare I/O device presents, check whether it is possible to

realize communication using the spare I/O device.

329

8. TROUBLESHOOTING

B-62445E/03

(i)

When parameter no.0020 is 0 or 1 or 2 (JD5A,JD5B of Main

CPU board) Replace the module since spindle module may be

faulty.

A16B-3200-0010

A16B-3200-0170

(1)

(2)

(3)

(4)

(5)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

A16B-3200-0110

A16B-2202-0860

(1)

(1)(2)

(3)

(4)

(5)(6)

(7)

(2)

(3)

(4)

(5)

(6)

(8)(9)

(7)

(8)

(10)

(9)

(11)

(10)

330

FANUC Series 16 / 160 / 18 / 180 – Model B. Maintenance Manual - page 11