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

9.AC SPINDLE

B-64485EN/01

Load meter

The load meter displays spindle load in a unit of 10%.

Load meter data

Load meter [%] =

× Max. output value of load meter (*)

32767

(*) Parameter No. 4127: High-speed winding of main spindle

Parameter No. 4274: High-speed winding of subspindle

Parameter No. 4093: Low-speed winding of main spindle

Parameter No. 4279: Low-speed winding of subspindle

Control input signal

Max.10 signals those are ON are displayed from the following signals:

TLML

Torque limit command (low)

SPSL

Spindle selection signal

TLMH

Torque limit command (high)

MCFN

Power line switching

CTH1

Gear signal 1

SOCN

Soft start/stop

CTH2

Gear signal 2

RSL

Output switching request

SRV

Spindle reverse rotation

RCH

Power line state confirm

SFR

Spindle forward rotation

INDX

Orientation stop pos. change

ORCM

Spindle orientation

ROTA

Rotation direction of ORCM

MRDY

Machine ready

NRRO

Short-cut of ORCM

ARST

Alarm reset signal

INTG

Speed integral control signal

*ESP

Emergency stop

DEFM Differential mode command

Control output signals

Max. 10 signals those are ON are displayed from the following signals:

ALM

Alarm signal

TLM5

Torque limitation

SST

Speed zero signal

ORAR

Orientation end signal

SDT

Speed detecting signal

CHP

Power line switched signal

SAR

Speed arrival signal

CFIN

Spindle switch complete

LDT1

Load detecting signal 1

RCHP

Output switch signal

LDT2

Load detecting signal 2

RCFN Output switch complete signal

9.1.2.5 Correspondence between operation mode and parameters on

spindle tuning screen

Normal operation mode

S11:

S12:

S21:

S22:

1st Main

1st Sub

2nd Main

2nd Sub

Proportional gain (HIGH)

4040

4206

4040

4206

Proportional gain (LOW)

4041

4207

4041

4207

Integral gain (HIGH)

4048

4212

Integral gain (LOW)

4049

Motor voltage

4083

4236

4083

4236

Regenerative power

4080

4231

4080

4231

Orientation mode

S11:

S12:

S21:

S22:

1st Main

1st Sub

2nd Main

2nd Sub

Proportional gain (HIGH)

4042

4208

4042

4208

Proportional gain (LOW)

4043

4209

4043

4209

Integral gain (HIGH)

4050

4213

Integral gain (LOW)

4051

Loop gain (HIGH)

4060

4218

Loop gain (MED.HIGH)

4061

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B-64485EN/01

9.AC SPINDLE

S11:

S12:

S21:

S22:

1st Main

1st Sub

2nd Main

2nd Sub

Loop gain (MED.LOW)

4062

4219

Loop gain (LOW)

4063

Motor voltage

4084

4237

4084

4237

Gain change upon completion of orientation

4064

4220

4064

4220

Stop position shift

4077

4228

4077

4228

PC-type orientation stop position

4031

4204

4031

4204

Synchronization control mode

S11:

S12:

S21:

S22:

1st Main

1st Sub

2nd Main

2nd Sub

Proportional gain (HIGH)

4044

4210

4044

4210

Proportional gain (LOW)

4045

4211

4045

4211

Integral gain (HIGH)

4052

4214

Integral gain (LOW)

4053

Loop gain (HIGH)

4065

4221

Loop gain (MED.HIGH)

4066

Loop gain (MED.LOW)

4067

4222

Loop gain (LOW)

4068

Motor voltage

4085

4238

4085

4238

Acc./Dec. time constant

4032

Shift amount

4034

Rigid tapping mode

S11:

S12:

S21:

S22:

1st Main

1st Sub

2nd Main

2nd Sub

Proportional gain (HIGH)

4044

4210

4044

4210

Proportional gain (LOW)

4045

4211

4045

4211

Integral gain (HIGH)

4052

4214

Integral gain (LOW)

4053

Loop gain (HIGH)

4065

4221

Loop gain (MED.HIGH)

4066

Loop gain (MED.LOW)

4067

4222

Loop gain (LOW)

4068

Motor voltage

4085

4238

4085

4238

ZRN gain %

4091

4239

4091

4239

Grid shift amount at servo mode

4073

4223

4073

4223

Cs contour control mode

S11:

S12:

S21:

S22:

1st Main

1st Sub

2nd Main

2nd Sub

Proportional gain (HIGH)

4046

Proportional gain (LOW)

4047

Integral gain (HIGH)

4054

Integral gain (LOW)

4055

Loop gain (HIGH)

4069

Loop gain (MED.HIGH)

4070

Loop gain (MED.LOW)

4071

Loop gain (LOW)

4072

Motor voltage

4086

ZRN gain %

4092

Reference position shift

4135

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9.AC SPINDLE

B-64485EN/01

Spindle positioning control mode

S11:

S12:

S21:

S22:

1st Main

1st Sub

2nd Main

2nd Sub

Proportional gain (HIGH)

4044

4210

4044

4210

Proportional gain (LOW)

4045

4211

4045

4211

Integral gain (HIGH)

4052

4214

Integral gain (LOW)

4053

Loop gain (HIGH)

4065

4221

Loop gain (MED.HIG)

4066

Loop gain (MED.LOW)

4067

4222

Loop gain (LOW)

4068

Motor voltage

4085

4238

4085

4238

ZRN gain %

4091

4239

4091

4239

Reference position shift

4073

4223

4073

4223

9.1.3

Automatic Setting of Standard Parameters

The standard parameters related to each motor model can be set automatically.

* The specifications for controlling a motor depend on the specifications defined by the machine tool

builder. The parameters defined by the machine tool builder are set as the standard values (initial

values) by this automatic setting function. Therefore, when performing automatic operation, always

set parameters properly according to the parameter list (parameters 4000 and later).

Turn on the power in the emergency stop state.

Set bit 7 of parameter 4019 to 1.

4019

LDSP

[Input type] Parameter input

[Data type] Bit spindle

#7 LDSP The parameters for the serial interface spindle are:

0: Not set automatically.

1: Set automatically.

Set a motor model code.

4133

Motor model code

Code

Motor model

Amplifier

301

αiI 0.5/10000 (3000/10000min^-1)

αiSP2.2

302

αiI 1/10000 (3000/10000min^-1)

αiSP2.2

304

αiI 1.5/10000 (1500/10000min^-1)

αiSP5.5

305

αiI 1.5/15000 (3000/150000min^-1)

αiSP15

306

αiI 2/10000 (1500/10000min^-1)

αiSP5.5

307

αiI 2/15000 (3000/15000min^-1)

αiSP22

308

αiI 3/10000 (1500/10000min^-1)

αiSP5.5

309

αiI 3/12000 (1500/12000min^-1)

αiSP11

310

αiI 6/10000 (1500/10000min^-1)

αiSP11

311

αiI 0.5/10000HV (3000/10000min^-1)

αiSP5.5HV

312

αiI 8/8000 (1500/8000min^-1)

αiSP11

313

αiI 1/10000HV (3000/10000min^-1)

αiSP5.5HV

314

αiI 12/7000 (1500/7000min^-1)

αiSP15

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B-64485EN/01

9.AC SPINDLE

Code

Motor model

Amplifier

315

αiI 1.5/10000HV (1500/10000min^-1)

αiSP5.5HV

316

αiI 15/7000 (1500/7000min^-1)

αiSP22

317

αiI 2/10000HV (1500/10000min^-1)

αiSP5.5HV

318

αiI 18/7000 (1500/7000min^-1)

αiSP22

319

αiI 3/10000HV (1500/10000min^-1)

αiSP5.5HV

320

αiI 22/7000 (1500/7000min^-1)

αiSP26

321

αiI 6/10000HV (1500/10000min^-1)

αiSP11HV

322

αiI 30/6000 (1150/6000min^-1)

αiSP45

323

αiI 40/6000 (1500/6000min^-1)

αiSP45

324

αiI 50/4500 (1150/4500min^-1)

αiSP55

325

αiI 8/8000HV (1500/8000min^-1)

αiSP11HV

326

αiI 12/7000HV (1500/7000min^-1)

αiSP15HV

327

αiI 15/7000HV (1500/7000min^-1)

αiSP30HV

328

αiI 22/7000HV (1500/7000min^-1)

αiSP30HV

329

αiI 30/6000HV (1150/6000min^-1)

αiSP45HV

401

αiI 6/12000 (1500/12000, 4000/12000min^-1)

αiSP11

402

αiI 8/10000 (1500/10000, 4000/10000min^-1)

αiSP11

403

αiI 12/10000 (1500/10000, 4000/10000min^-1)

αiSP15

404

αiI 15/10000 (1500/10000, 4000/10000min^-1)

αiSP22

405

αiI 18/10000 (1500/10000, 4000/10000min^-1)

αiSP22

406

αiI 22/10000 (1500/10000, 4000/10000min^-1)

αiSP26

407

αiIP 12/6000 (500/1500, 750/6000min^-1)

αiSP11

408

αiIP 15/6000 (500/1500, 750/6000min^-1)

αiSP15

409

αiIP 18/6000 (500/1500, 750/6000min^-1)

αiSP15

410

αiIP 22/6000 (500/1500, 750/6000min^-1)

αiSP22

411

αiIP 30/6000 (400/1500, 575/6000min^-1)

αiSP22

412

αiIP 40/6000 (400/1500, 575/6000min^-1)

αiSP26

413

αiIP 50/6000 (575/1500, 1200/6000min^-1)

αiSP26

414

αiIP 60/4500 (400/1500, 750/4500min^-1)

αiSP30

415

αiI 100/4000HV (1000/3000, 2000/4000min^-1)

αiSP75HV

418

αiIP 40/6000HV (400/1500, 575/6000min^-1)

αiSP30HV

Turn off the power then back on. Then, the parameters are read.

9.1.4

Warning Interface

Overview

The warning state can be reported before an alarm is issued. When the warning state is entered, a report to

the PMC is sent.

For example, this signal can be used for retracting tools or reducing cutting load from the time a warning

occurs by the time an overheat alarm occurs. In addition, the warning number is displayed also on the

diagnosis screen.

Signal

Spindle warning detailed signals SPWRN1 to SPWRN9 <F264.0 to .7, F265.0>

[Classification] Output

[Function] Reports the warning number corresponding to the state of the αi spindle amplifier.

[Output condition] When the αi spindle is in the warning state, a warning number consisting of SPWRN1 to

SPWRN9 is output as nine-bit binary data.

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9.AC SPINDLE

B-64485EN/01

If warnings occurred on multiple αi spindle amplifiers, the warning number of the αi

spindle having the smallest axis number is output.

The warning numbers and their descriptions are shown below.

Warning

Contents

Details

number

MOTOR OVERHEAT

When the motor temperature increases beyond the overheat warning

detection level (set by a parameter), a warning signal is output. At this

time, spindle operation is continued. So, perform necessary processing

with the PMC.

An alarm is issued when the motor temperature has reached the

overheat alarm detection level.

PS IMPROPER INPUT

If an abnormal condition is detected on the main power supply, a

POWER

warning signal is output. Since the spindle continues to operate at this

time, use the PMC to perform processing as needed.

COOLING FAN FAILURE

If the internal fan stops, the warning signal is output. Since the spindle

continues to operate at this time, use the PMC to perform processing

as needed.

About one minute after the warning signal is output, an alarm occurs.

PS OVERLOAD

If the main circuit of the Power Supply (PS) is overloaded, the warning

signal is output. Since the spindle continues to operate at this time,

use the PMC to perform processing as needed.

An alarm is issued when a certain period of time elapses after warning

signal output.

PS INTERNAL FAN

If the Power Supply (PS) cooling fan stops, the warning signal is

FAILURE

output. Since the spindle continues to operate at this time, use the

PMC to perform processing as needed.

About one minute after the warning signal is output, an alarm occurs.

COOLING RADI FAN

If the radiator cooling fan stops, the warning signal is output. Since the

FAILURE

spindle continues to operate at this time, use the PMC to perform

processing as needed.

If the main circuit overheats, an alarm occurs.

113

PS EXTERNAL FAN

If the Power Supply (PS) radiator cooling fan stops, the warning signal

FAILURE

is output. Since the spindle continues to operate at this time, use the

PMC to perform processing as needed.

If the Power Supply (PS) main circuit overheats, an alarm occurs.

Signal address

F264

SPWRN8

SPWRN7

SPWRN6

SPWRN5

SPWRN4

SPWRN3

SPWRN2

SPWRN1

F265

SPWRN9

Diagnosis screen

The status of a warning is displayed on the following diagnostic screen.

712

Warning status of spindle

[Data type] Word spindle

The number of a warning caused on each spindle is indicated.

If there is no warning, 0 is indicated.

- 526 -

B-64485EN/01

9.AC SPINDLE

9.1.5

Spindle Information Screen

Overview

In the αi spindle system, ID information output from each of the connected units is obtained and output to

the CNC screen.

The units that have ID information are shown below.

• Spindle amplifier (SP)

• Power Supply (PS)

The ID information recorded during first startup can be compared with the ID information read this time

on the screen to check whether the configuration of the connected units is changed. (If there is a

difference between them, the alarm mark (*) appears.)

The recorded ID information can be edited. Therefore, the ID information of an unit that does not have ID

information can be displayed. (However, the alarm mark (*) indicating a difference between these IDs

appears.)

Parameter

11320

IDC

[Input type] Parameter input

[Data type] Bit path

#1 IDC The soft key [UPDATEALL ID], which updates ID information on the servo or spindle

information screen as a batch, is:

0: Not displayed.

1: Displayed.

NOTE

IDC is effective only if bit 0 (IDW) of parameter No. 13112 is set to

13112

SPI

IDW

[Input type] Parameter input

[Data type] Bit path

#0 IDW Editing on the servo or spindle information screen is:

0: Prohibited.

1: Not prohibited.

#2 SPI The servo information screen is:

0: Displayed.

1: Not displayed.

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B-64485EN/01

9.AC SPINDLE

Spindle switch control

When spindle switch control is used, the ID information of the subspindle is also displayed.

Additional Information

Even if replacement is performed reasonably such as for repairing, this function

incorrectly indicates the * mark when it detects the replacement.

To clear the * mark, follow the steps below to update the registered data, as

described in the editing section later.

(1) Make the registered data editable. (Bit 0 (IDW) of parameter No. 13112 = 1)

(2) On the edit screen, place the cursor on the item from which you want to

delete the * mark.

(3) Operate the soft keys [READ ID], [INPUT], and [SAVE] in that order.

To clear all * marks at a time, press soft key [UPDATEALL ID] (displayed when

bit 1 (IDC) of parameter No. 11320 is set to 1).

- 529 -

9.AC SPINDLE

B-64485EN/01

Editing the spindle information screen

Assume that bit 0 (IDW) of parameter No. 13112 = 1 and bit 1 (IDC) of parameter No. 11320 = 1.

Press the MDI switch on the machine operator's panel.

Follow the steps shown in "Displaying the spindle information screen" to display the screen as

shown below.

To move key-in buffer on the screen, use the page keys

and

Screen operation on the editing screen

Mode

Key operation

Use

Viewing (*1)

Page key

Scrolls up or down on a screen-by-screen basis.

Editing (*2)

Soft key

[INPUT]

Replace the selected ID information at the cursor position with the

character string in key-in buffer.

[CANCEL]

Deletes the character string in key-in buffer.

[READ ID]

Transfers the ID information the connected device at the cursor has

to the key-in buffer. Only the items preceded by * (*3) are valid.

[SAVE]

Saves the ID information that has been changed on the spindle

information screen in flash ROM.

[RELOAD]

Cancels the ID information that has been changed on the spindle

information screen and loads ID information from flash ROM.

[UPDATEALL ID] (*4)

Updates the ID information for all axes that is output from each of

the connected units displayed on the servo or spindle information

screen at a time.

Page key

Scrolls up or down on a screen-by-screen basis.

Cursor key

Scrolls up or down the selection of ID information.

*1 Viewing mode: when bit 0 (IDW) of parameter No. 13112 = 0

*2 Editing mode: when bit 0 (IDW) of parameter No. 13112 = 1

*3 Spindle information is stored in flash ROM. If there is a difference between the ID information in

screen and the actual ID information, the corresponding items are preceded by *.

*4 when bit 1 (IDC) of parameter No. 11320 = 1

- 530 -

10.TROUBLESHOOTING

B-64485EN/01

10 TROUBLESHOOTING

This chapter describes troubleshooting procedure.

10.1 CORRECTIVE ACTION FOR FAILURES

532

10.2 NO MANUAL OPERATION NOR AUTOMATIC OPERATION CAN BE EXECUTED

534

10.3 JOG OPERATION CANNOT BE DONE

537

10.4 HANDLE OPERATION CANNOT BE DONE

540

10.5 AUTOMATIC OPERATION CANNOT BE DONE

544

10.6 CYCLE START LED SIGNAL HAS TURNED OFF

549

10.7 NOTHING IS DISPLAYED ON THE LCD WHEN THE POWER IS TURNED ON

550

10.8 INPUT FROM AND OUTPUT TO I/O DEVICES CANNOT BE PERFORMED

INPUT/OUTPUT CANNOT BE PERFORMED PROPERLY

551

10.9 IN A CONNECTOR PANEL I/O UNIT, DATA IS INPUT TO AN UNEXPECTED ADDRESS553

10.10 IN A CONNECTOR PANEL I/O UNIT, NO DATA IS OUTPUT TO AN EXPANSION UNIT 554

10.11 ALARM SR0085 TO SR0087 (READER/PUNCHER INTERFACE ALARM)

555

10.12 ALARM PS0090 (REFERENCE POSITION RETURN IS ABNORMAL)

559

10.13 ALARM DS0300 (REQUEST FOR REFERENCE POSITION RETURN)

560

10.14 ALARM SV0401 (V READY OFF)

561

10.15 ALARM SV0404 (V READY ON)

563

10.16 ALARM SV0462 (SEND CNC DATA FAILED)

ALARM SV0463 (SEND SLAVE DATA FAILED)

563

10.17 ALARM SV0417 (DIGITAL SERVO SYSTEM IS ABNORMAL)

564

10.18 ALARM OH0700 (OVERHEAT: CONTROL UNIT)

564

10.19 ALARM OH0701 (OVERHEAT: FAN MOTOR)

565

10.20 ALARM SV5134 (FSSB: OPEN READY TIME OUT)

ALARM SV5137 (FSSB: CONFIGURATION ERROR)

ALARM SV5197 (FSSB: OPEN TIME OUT)

565

10.21 ALARM SV5136 (FSSB: NUMBER OF AMPS IS SMALL)

566

10.22 SERVO ALARMS

566

10.23 SPINDLE ALARMS

566

10.24 SYSTEM ALARMS

566

10.25 SYSTEM ALARMS RELATED TO THE PMC AND I/O Link

575

10.26 LEDS ON UNITS SUPPORTING I/O LINK i

584

10.1 CORRECTIVE ACTION FOR FAILURES

When a failure occurs, it is important to correctly grasp what kind of failure occurred and take appropriate

action, to promptly recover the machine.

Check for the failure according to the following procedure :

When?

With what operation?

What failure?

Grasp the kind of failure

↓

Appropriate action

↓

Recovery

- 532 -

B-64485EN/01

10.TROUBLESHOOTING

10.1.1 Investigating the Conditions under which Failure Occurred

(1) When and how many times (frequency of occurrences)

(2) With what operation

(3) What failure occurred

If the alarm issued is a system alarm, obtain system alarm information while referencing the descriptions in Section

10.24.

When did the failure occur?

•

Date and time?

•

Occurred during operation? (how long was the operation?)

•

Occurred when the power was turned on?

•

Was there any lightening surge, power failure, or other disturbances to the power supply?

How many times has it occurred

•

Only once?

•

Occurred many times ? (How many times per hour, per day, or per month?)

With what operation did it occur ?

•

What was the NC mode when the failure occurred?

Jog mode/memory operation mode /MDI mode /reference position return mode

•

If during program operation,

Where in the program ?

Which program No. and sequence No. ?

What program ?

Occurred during axial movement ?

Occurred during the execution of an M/S/T code ?

Failure specific to the program ?

•

Does the same operation cause the same failure ?

(Check the repeatability of the failure.)

•

Occurred during data input/output ?

•

For a failure related to feed axis servo

(1) Occurred at both low feedrate and high feedrate ?

(2) Occurred only for a certain axis ?

•

For a failure related to spindles

When did the failure occur ? (during power-on, acceleration, deceleration, or constant rotation)

What failure occurred ?

•

Which alarm was displayed on the alarm display screen?

(Check the axis along which an alarm has occurred for alarms SV alarms, OT alarms, or SP

alarms.)

•

Is the screen correct ?

•

If machining dimensions are incorrect

(1) How large is the error ?

(2) Is the position display on the CRT correct ?

(3) Are the offsets correct ?

Other information

•

Is there noise origin around machine?

If the failure has not occurred frequently, the cause may be external noise to the power supply

or inductive noise on machinery cables.

Operate other machines connected to the same power line and see if noise come from the relays

or compressors.

- 533 -

10.TROUBLESHOOTING

B-64485EN/01

•

Is it taken any countermeasure for noise in machine side?

See Section 2.8, “CAUTIONS RELATED TO GROUNDING AND NOISE”.

•

Check the following for the input power supply voltage :

(1) Is there variation in the voltage ?

(2) Are the voltages different depending on the phase ?

(3) Is the standard voltage supplied ?

•

How high is the ambient temperature of the control unit?

Refer to manual about noise.

•

Has excessive vibration been applied to the control unit?

When you contact our service center, specify the following items :

(1) Name of the NC unit

(2) Name of the machine tool builder and type of machine

(3) Software series/version of the NC

(4) Specifications of the servo amplifier and motor

(for a failure related to the servo)

(5) Specifications of the spindle amplifier and spindle motor

(for a failure related to a spindle)

• See the drawing issued by the machine tool builder for the locations of the NC unit and

servo/spindle amplifiers.

• We use the following specification codes :

Servo /spindle amplifier : A06B-xxxx-Hxxx

Servo/spindle amplifier

: A06B-xxxx-Bxxx

NOTE

The mark ‘x’ represents a number.

10.2 NO MANUAL OPERATION NOR AUTOMATIC 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 diagnosis function

Causes and Countermeasures

Position display (relative, absolute, machine coordinate) does not change

(1) Check CNC status display (Refer to Section, “CNC STATUS DISPLAY” for detail.)

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

If status display shows EMG the emergency stop signal is input. Check the following signal

using the PMC's diagnosis function (PMCDGN).

X0008

*ESP

G0008

*ESP

*ESP :

ESP=0 indicates that emergency stop signal is input.

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B-64485EN/01

10.TROUBLESHOOTING

(b) It is a reset status

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

PMC's diagnosis function (PMCDGN).

(i)

An input signal from the PMC functions

G0008

ERS

RRW

ERS : When ERS is 1, external reset signal is input.

RRW : When RRW is 1, reset & rewind signal is input.

(ii) RESET key on the MDI unit 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 MDI unit.

(c)

Confirm the status of modes

Operation mode status is displayed on the lower part of screen as follows :

If nothing is displayed, mode select signal is not input. Check mode select signal using PMC's

diagnosis function (PMCDGN).

For details, refer to section, “CNC 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 CNC diagnosis data No. 0000, 1010. Check the items for which 1 is displayed at right side.

* Items with (a) to (d) relate with manual and automatic operation and its detail is shown below.

- 535 -

10.TROUBLESHOOTING

B-64485EN/01

(a) In-position check is being done

It shows that positioning is not yet completed. Check the following diagnosis data. (It is 1 in

the following condition)

DGN0300

Position Error > PARAM1826

In-position width

(i)

Check the parameters according to the parameter list.

1825

Servo loop gain per axis (Normal : 3000)

(b) Jog feedrate override is 0%

Check the signals using the PMC's signal status screen.

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%

There are a plural interlock signals. Check at first which interlock signal is used by the machine

tool builder at the parameters shown below.

3003

ITX

ITL

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

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

Check state of effective interlock signals using the PMC's signal status screen.

(i)

Interlock signals (*IT, *CSL, and *BSL) are input.

G0008

*BSL

*CSL

*IT

*IT=0, *CSL=0, and *BSL=0 show that interlock signal is input.

(ii) Axis interlock signal (*ITn) is input.

G0130

*IT8

*IT7

*IT6

*IT5

*IT4

*IT3

*IT2

*IT1

*ITn=0 shows interlock signal is input.

(d) The NC is in the reset state.

In this state, "RESET" is display as the state indication of the previous item 1-(1)-(b). So, not

only manual operation but also all automatic operations are disabled. So, referring to the

Section "Manual and Automatic Operations are Disabled", make an investigation.

(e) The address to which an axis signal is assigned is incorrect.

The relationship between each CNC axis and PMC interface address is set in a parameter.

Check the setting of the following parameter:

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B-64485EN/01

10.TROUBLESHOOTING

3021

Address to which an axis signal is assigned

When machine coordinate value does not update on position display

Machine lock signal (MLK) is input.

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.

10.3 JOG OPERATION CANNOT BE DONE

Points

(1) Check whether position display is operating.

(2) Check CNC status display.

(3) Check internal status using Diagnostic function.

Causes and Countermeasures

Position display (relative, absolute, machine coordinate) does not change

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

When status display shows JOG, it is normal.

When status display does not show JOG, mode select signal is not selected correctly. Confirm the

mode select signal using the PMC's signal status screen.

G0043

MD4

MD2

MD1

↓

Manual operation (JOG) mode

(2) Feed axis and direction select signal is not input Check the signal using the PMC's signal status

screen.

G0100

+J8

+J7

+J6

+J5

+J4

+J3

+J2

+J1

G0102

-J8

-J7

-J6

-J5

-J4

-J3

-J2

-J1

When a bit is "1", the corresponding feed axis direction selection signal has been entered.

Feed along the 1st axis

Feed along the 8th axis

Feed in the + direction

Feed in the - direction

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10.TROUBLESHOOTING

B-64485EN/01

Example)

In the normal state, pressing the "+X" button on the operator's panel causes the signal +Jn to be

displayed as "1".

* This signal becomes effective when the rise of the signal is detected. If, therefore, the direction

selection signal has been entered before jog mode selection, axis movement is not performed;

set the bit "0" and then re-check the signal.

(3) Check CNC diagnosis data No. 0000, 1010. Check the items for which 1 is displayed at right side.

* Items with (a) to (d) relate with manual and automatic operation and its detail is shown below.

(a) In-position check is being done

It shows that positioning is not yet completed. Check the following diagnosis data. (It is 1 in

the following condition)

DGN0300

Position Error>Parameter No.1826

In-position width

(i)

Check the parameters according to the parameter list.

1825

Servo loop gain per axis (Normal : 3000)

(b) Jog feedrate override is 0%

Check the signals using the PMC's signal status screen.

G0100

*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%

There are a plural interlock signals. Check at first which interlock signal is used by the machine

tool builder at the parameters shown below.

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10.TROUBLESHOOTING

3003

ITX

ITL

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

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

Check state of effective interlock signals using the PMC's signal status screen.

(i)

Interlock signal (*IT) is input.

G0008

*IT

*IT=0 shows that interlock signal is input.

(ii) Axis interlock signal (*ITn) is input.

G0130

*IT8

*IT7

*IT6

*IT5

*IT4

*IT3

*IT2

*IT1

*ITn=0 shows interlock signal is input.

(d) NC is in a reset state

In this state, not only manual operation but also automatic operation is disabled. Make an

investigation according to the Section, "Manual Operation and Automatic Operation are

Disabled."

(4)

Jog feed rate setting (Parameter) is not correct.

1423

Jog feedrate per axis

(5)

Manual feed per revolution is selected

This function feeds an axis synchronized with spindle rotation and whether this function is used or

not is selected by the following parameter:

1402

JRV

JRV Jog feed and incremental feed are :

0 : Of feed per minute

1 : 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.

(6)

The specified axis is the index table indexing axis. <machining center system only>

For the index table indexing axis (B-axis), jog feed, incremental feed, and manual handle feed

cannot be performed.

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10.TROUBLESHOOTING

B-64485EN/01

10.4 HANDLE OPERATION CANNOT BE DONE

Points

If manual handle operation cannot be performed, the probable causes include the following:

• The servo is not activated.

• Manual pulse generators are not connected properly to the I/O module.

• The I/O Link i or I/O Link of the I/O module is not allocated, or is not allocated properly.

• A related input signal is not input due to a parameter setting error.

Also use CNC diagnosis functions to check the internal status.

Causes and Countermeasures

The servo is not activated

Check that the LED on the servo amplifier indicates "0". If a number other than "0" is indicated, the servo

is not activated. In this state, even JOG operation and automatic operation cannot be operated.

Check the servo-related parameters and the wiring.

2 Checking the manual pulse generators

(1) Cable failures (such as breaks)

Examine the cables for faults such as breaks and short-circuits, referring to the figure below.

CNC

Distributed I/O module

(Main board)

Operator's panel I/O module

First manual pulse

JA3

generator

IOLINK

(JD1A)

JD1B

Second manual

pulse generator

Third manual pulse

generator

CNC

Distributed I/O module

Manual pulse

(Main board)

Operator's panel I/O module

generators

JD1A

Shield

JD1B

JA3

Shield

SIN(01)

(03)SOUT

HA1(01)

HA1

*SIN(02)

(04)*SOUT

HB1(02)

HB1

First

SOUT(03)

(01)SIN

+5V(09)

+5V

*SOUT(04)

(02)*SIN

0V(12)

0V(11)

(11)0V

0V(12)

(12)0V

HA2(03)

HA2

0V(13)

(13)0V

HB2(04)

HB2

Second

0V(14)

(14)0V

+5V(18)

+5V

0V(14)

HA3(05)

HA3

HB3(06)

HB3

Third

+5V(20)

+5V

0V(16)

(2) Manual pulse generator failures

When rotated, a manual pulse generator generates the signals shown below.

Using an oscilloscope, measure the signals from the screw terminal block located at the rear of a manual

pulse generator. If no signals are output, measure the +5 V voltage.

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10.TROUBLESHOOTING

Rear of a manual pulse generator

Screw

terminal

block

HA: Manual pulse generator phase A signal

HB: Manual pulse generator phase B signal

+5V 0V HA HB

When rotated in the plus direction

When rotated in the minus direction

1 : 1

+5V

Off

+5V

Off

1 : 1

1/4

1/4 (phase difference)

Check the on/off ratio and the phase difference between HA and HB.

Checking the parameters and input signals

See Section “CNC STATE DISPLAY.”

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

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

signal status screen.

G0043

MD4

MD2

MD1

↓

Manual handle mode

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

Check the signals using the PMC's signal status screen.

G0018

HS2D

HS2C

HS2B

HS2A

HS1D

HS1C

HS1B

HS1A

G0019

HS3D

HS3C

HS3B

HS3A

G0020

HS4D

HS4C

HS4B

HS4A

G0379

HS5D

HS5C

HS5B

HS5A

G0411

HS4E

HS3E

HS2E

HS1E

G0412

HS5E

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

HSnE

HSnD

HSnC

HSnB

HSnA

no selection

1st axis

2nd axis

3rd axis

4th axis

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10.TROUBLESHOOTING

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Selected axis

HSnE

HSnD

HSnC

HSnB

HSnA

5th axis

6th axis

7th axis

8th axis

9th axis

10th axis

11th axis

12th axis

13th axis

14th axis

15th axis

16th axis

17th axis

18th axis

19th axis

20th axis

21st axis

22nd axis

23rd axis

24th axis

NOTE

In the above table, n is the number of the manual pulse generator (MPG) and up

to 5 MPGs can be used. A feed axis is selected by 4-bit code of A to E.

(3) Manual handle feed multiplication is not correct

Check the following signals using the PMC's signal status screen. Also confirm the following parameters

based on the parameter list.

G0019

MP2

MP1

In handle mode, the travel distance per step can be changed.

MP2

MP1

Step feed

Handle feed

100

× Mn

× 1000

× Nn

7100

MPX

#5 MPX In Manual handle feed mode, manual handle feed amount selection signal is

0 : same for all manual pulse generator, and it is set by signals MP1 and

MP2<Gn019.4,.5>.

1 : differ to each other manual pulse generator, and it’s setting signal as follow:

1st Manual Pulse Generator : MP1,MP2<Gn019.4,.5>

2nd Manual Pulse Generator : MP21,MP22<Gn087.0,.1>

3rd Manual Pulse Generator : MP31,MP32<Gn087.3,.4>

4th Manual Pulse Generator : MP41,MP42<Gn087.6,.7>

5th Manual Pulse Generator : MP51,MP52<Gn380.0,.1>

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10.TROUBLESHOOTING

7102

HNGx

#0 HNGx Axis movement direction for rotation direction of manual pulse generator

0: Same in direction

1: Reverse in direction

7113

Manual handle feed magnification m

7114

Manual handle feed magnification n

7131

Manual handle feed magnification m2 / 2nd. manual pulse generator

7132

Manual handle feed magnification n2 / 2nd. manual pulse generator

7133

Manual handle feed magnification m3 / 3rd. manual pulse generator

7134

Manual handle feed magnification n3 / 3rd. manual pulse generator

7135

Manual handle feed magnification m4 / 4th. manual pulse generator

7136

Manual handle feed magnification n4 / 4th. manual pulse generator

7137

Manual handle feed magnification m5 / 5th. manual pulse generator

7138

Manual handle feed magnification n5 / 5th. manual pulse generator

(4) The specified axis is the index table indexing axis. <machining center system only>

For the index table indexing axis (B-axis), jog feed, incremental feed, and manual handle feed cannot be

performed.

Checking the CNC diagnosis functions

(1) Check CNC diagnosis data No. 0000, 1010. Check the items for which 1 is displayed at right side.

* Items with (a) to (c) relate with manual and automatic operation and its detail is shown below.

(a) In-position check is being done

It shows that positioning is not yet completed. Check the following diagnosis data. (It is 1 in

the following condition)

DGN0300

Position Error>Parameter No.1826

In-position width

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10.TROUBLESHOOTING

B-64485EN/01

(i)

Check the parameters according to the parameter list.

1825

Servo loop gain per axis (Normal : 3000)

(b) Interlock or start lock signal is input

There are a plural interlock signals. Check at first which interlock signal is used by the machine

tool builder at the parameters shown below.

3003

ITX

ITL

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

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

Check state of effective interlock signals using the PMC's signal status screen.

(i)

Interlock signal (*IT) is input.

G0008

*IT

*IT=0 shows that interlock signal is input.

(ii) Axis interlock signal (*ITn) is input.

G0130

*IT8

*IT7

*IT6

*IT5

*IT4

*IT3

*IT2

*IT1

*ITn=0 shows interlock signal is input.

In this state, not only manual operation but also automatic operation is disabled. Make an

investigation according to the Section, "Manual Operation and Automatic Operation are

Disabled."

10.5 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 Countermeasures

When manual operation is either impossible, perform countermeasure, based on the Section, "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.

When cycle operation is not started (Cycle start LED does not light)

"****" is displayed at status display on screen.

(1) Mode select signal is not correct.

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 PMC's signal

status screen.

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10.TROUBLESHOOTING

G0043

DNCI

MD4

MD2

MD1

DNCI

MD4

MD2

MD1

Mode select

Manual data input (MDI) mode

Automatic operation (MEM) 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 diagnosis

function(PMCDGN).

G0007

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 diagnosis function (PMCDGN).

G0008

*SP

*SP :

Feed hold signal

When an automatic operation is in progress (Cycle start LED is lit)

CNC's status display shows "STRT" on the screen.

(1) Check information displayed at CNC diagnosis data No. 0. Check the items for which 1 is displayed

at the right side.

Diagnosis

CNC internal state 1

[Data type] Bit

NAME

Internal state when "1" is displayed

INPOSITION CHECK

In-position check is being done.

FEEDRATE OVERRIDE 0% Feedrate override is 0%.

JOG FEED OVERRIDE 0% Jog feedrate override is 0%.

INTER/START LOCK ON Interlock/start lock is on.

SPEED ARRIVAL ON

The system is waiting for the speed arrival signal to

turn on.

WAIT REVOLUTION

The system is waiting for the spindle one-rotation

signal in threading.

STOP POSITION OCDER The system is waiting for the rotation of the position

coder in spindle feed per revolution.

FEED STOP

A feed stop was made.

* Items with a to e relate with an automatic operation and their details are as follows :

(a) In-position check (confirming positioning) is being done

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

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

amount. Check it diagnosis data as follows:

Diagnosis 300

Position error > Parameter No. 1826

In-position width

Position error amount almost becomes

0, when positioning of an axis

completes and when the amount becomes within the in-position width, it is

assumed that positioning completes and the next block is executed.

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10.TROUBLESHOOTING

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(b) Feedrate override is at 0%

Actual feedrate is overridden by the override signals to a programmed feedrate.

Check the override signals using the PMC's signal status screen.

• Normal override signal

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

• State of override signal

*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 1

254%

0 0 0 0 0 0 0 1

254%

0 0 0 0 0 0 0 0

Normally manual feedrate override function is used for jog feed.

But when DRN(dry run) signal turns on during an automatic operation, override values set with

these signals become valid to the following speed set by a parameter.

G0046

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%

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10.TROUBLESHOOTING

(d) Interlock 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

ITX

ITL

ITL 0: Interlock signal(*IT) is valid.

ITX 0: Interlock signal (*ITn) is valid.

Confirm which interlock signal is activated by the PMC's signal status screen.

(i)

Interlock signals (*IT, *CSL, and *BSL) are input.

G0008

*BSL

*CSL

*IT

*IT=0, *CSL=0, and *BSL=0 show that interlock signal is input.

(ii) 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.

(iii) Controlled axis detach function is running. A detached axis is specified for travelling.

* This function is valid when bit 7 (RMBx) of CNC parameter No. 1005=1. For whether

this function is running or not, confirm the following signal using the PMC's signal status

screen. Check the axis concerned.

The control axis detach signal (DTCHn) is input.

G0124

DTCH8

DTCH7

DTCH6

DTCH5

DTCH4

DTCH3

DTCH2

DTCH1

DTCHn If it is 1, the corresponding axis is detached.

The following parameter enables the control axis detach function to the corresponding

axis.

0012

RMVx

RMVx Releasing the assignment of the control axis for each axis

0: Not released

1: Released

(Equivalent to the control axis detachment signals DTCH1, DTCH2, and so forth)

(e) CNC is waiting for spindle speed arrival signal to be input

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

Confirm the signal state using the PMC's signal status screen.

G0029

SAR

When this signal is 0, spindle speed does not arrive at the specified speed.

* This function is valid when the bit 0 (SAR) of parameter No. 3708=1.

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(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 feedrate set by parameter is incorrect.

Feedrate (other than G00) is clamped at this upper feedrate.

1430

Maximum feedrate in each axis

(b)

Feedrate is specified by feed per revolution (mm/rev)

(i)

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

(ii) Position coder is faulty

(c)

Thread cutting does not operate

(i)

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

(ii) 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.

Whether A/B phase signals from the position coder are read correctly, can be judged also by

the spindle speed display on the screen (position screen).

(However, it is not displayed when bit 2 (DPS) of parameter No. 3105 is set to 0).

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• αi series spindle amplifier

CNC

Position coder

JA7B

JYA3

JA41

SPM

JA7A

Spindle motor

Position coder

JA7B

JYA3

SPM

JA7A

Spindle motor

(d) A cutting feed block containing a feedrate command (F command) with a feedrate of 0 is

specified.

If the bit

7 (FCO) of parameter No.

1404 is set to

1, alarm PS0011,

“FEED ZERO

(COMMAND)” is not issued even if a feedrate command (F command) with a feedrate of 0 is

issued.

10.6 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 diagnosis function.

Causes and Countermeasures

Check the states of the related signals on the signal status screen of PMC.

a. Emergency stop is input

X0008

*ESP

G0008

*ESP

*ESP=0 Emergency stop signal is input :

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 is pressed

An automatic operation is put into a reset status when

key on the MDI panel is pressed.

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10.TROUBLESHOOTING

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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 generated

When any servo alarm has generated, cycle operation is put into the reset state and operation stop.

Cycle operation is in a feed hold state

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

(1) Modes are switched from an automatic operation mode to a manual operation mode.

(2) Feed hold signal is input.

• Mode select signal

G0043

MD4

MD2

MD1

↓

Memory edit (EDIT)

Automatic

Automatic operation (AUTO)

operation

Manual data input (MDI)

Jog feed (JOG)

Handle/step

Manual operation

TEACH IN HANDLE

TEACH IN JOG

• Feed hold signal

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.

10.7 NOTHING IS DISPLAYED ON THE LCD WHEN THE

POWER IS TURNED ON

Causes and Countermeasures

If nothing is displayed on the LCD at power-up or if the LCD is locked with "LOADING GRAPHIC

SYSTEM", the probable causes include the following:

For the LCD-mounted type

• The LCD cable or backlight cable is not connected.

• The necessary software is not installed.

• The main board, display control card, CPU card, or inverter board is defective.

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10.TROUBLESHOOTING

For the stand-alone type

• The LCD unit is not connected to the power supply.

• The LCD cable or backlight cable is not connected.

• The LCD unit is not connected to the CNC with the optical cable or the cable is broken.

• The necessary software is not installed.

• The main board, display control card, or LCD unit is defective.

If “LOADING GRAPHIC SYSTEM” is displayed on a 15” display for the 30i/31i/32i, this indicates that

the display control circuit has started up normally, but the CNC has not started up or communication with

the CNC has not been established.

LED display

Check which LED lights on the main board while referencing the item “LED display” of the main board.

If the main board has started up normally and the LED display indicates normal operation, a probable

cause is a fault of the display system, such as a cable not connected or a defective inverter board.

If the LED display is locked in the middle of the startup process, the probable causes include defective

hardware (or installation failure) and the necessary software not installed.

Connection of the LCD and backlight cables

Check that the LCD and backlight cables are connected firmly to the corresponding connectors.

These cables are connected before shipment from FANUC. This check is, however, required because the

cables may be disconnected during maintenance.

The necessary software is not installed

If necessary software is not stored in the FROM module, the CNC may not start up.

Defective printed circuit board

If the main board or display control card is defective or is not correctly installed, the CNC may not start

up.

Check that the card PCBs are engaged firmly with the connectors on the main board.

If any of the above actions does not solve the problem, replace the display control card, CPU card, and

main board.

Installation positions of the display control card and CPU card

Referring to Section, “MOUNTING AND DEMOUNTING CARD PCBS,” check the installation status.

10.8 INPUT FROM AND OUTPUT TO I/O DEVICES CANNOT BE

PERFORMED, INPUT/OUTPUT CANNOT BE PERFORMED

PROPERLY

Causes and Countermeasures

If the I/O Link i or I/O Link is not established, if the signals from an I/O device cannot be input normally

to the CNC, or if the signals from the CNC cannot be output to an I/O device, the probable causes include

the following:

• The I/O device is not turned on, or the power supply is not at the appropriate voltage.

• The I/O Link i or I/O Link cable is not connected correctly or appropriately.

• The grounding is not correct.

• The input/output signals are not connected correctly.

• I/O Link i or I/O Link allocation is not performed, or is not performed properly.

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FANUC Series 30i-MODEL B, 31i-MODEL B, 32i-MODEL B. MAINTENANCE MANUAL - page 19