No.

Message

Cause

Action

001

DATA ACCESS EXCEPTION

Abnormality and contradiction were detected in internal processing and the data etc. of  the CNC system software.

Replace the most possibly faulty  component displayed on the third  line of the system alarm screen or  the system alarm log. Moreover,  please contact FANUC after taking  the system alarm log.

002

INSTRUCTION ACCESS

EXCEPTION

003

ALIGNMENT EXCEPTION

004

PROGRAM EXCEPTION

005

FLOATING-POINT UNAVAILABLE

007

SYSTEM CALL EXCEPTION

008

TRACE EXCEPTION

012

INSTRUCTION ADDRESS BREAK POINT

013

SYSTEM MANAGEMENT

INTERRUPT

014

FPU-INVALID OPERATION

EXCEPTION

015

FPU-ZERO DIVIDE EXCEPTION

016

FPU-OVERFLOW EXCEPTION

017

FPU-INEXACT EXCEPTION

018

UNASSIGNED EXCEPTION

019

ILLEGAL INSTRUCTION

PROGRAM EXCEPTION

020

PRIVILEGED INSTRUCTION PROGRAM EXCEPTION

021

TRAP PROGRAM EXCEPTION

022

DATA BUS PARITY ERROR

(MCP)

CPU internal abnormality was detected.

023

ADDRESS BUS PARITY ERROR(MCP)

024

L2 DATA CACHE PARITY ERROR(MCP)

Replace the most possibly faulty component displayed on the third  line of the system alarm screen or  the system alarm log.

025

PROCESSOR INTERNAL ERROR(MCP)

026

CACHE TAG PARITY ERROR(MCP)

103

DRAM SUM ERROR

Abnormality and contradiction were detected in internal  

processing and the data etc. of  the CNC system software.

Replace the most possibly faulty component displayed on the third  line of the system alarm screen or  the system alarm log. Moreover,  please contact FANUC after taking  the system alarm log.

109

ZERO DIVIDE ERROR (INTEGER)

110

STACK OVERFLOW (TASK)

111

STACK UNDERFLOW (TASK)

112

STACK OVERFLOW (IRT)

113

STACK UNDERFLOW (IRT)

114

FSSB DISCONNECTION (MAIN ->  AMP1) /LINEx

An alarm was detected on the  FSSB line x.

No FSSB communication can be  performed between the units  stated in the parentheses.

Replace the servo card, additional  axis board, amplifier, or separate  detector interface unit of interest. It  is also likely that there may be a  problem on an optical fiber cable  between the connections of interest.

115

FSSB DISCONNECTION (MAIN -> SDU1) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

116

FSSB DISCONNECTION (AMPn -> AMPm) /LINEx

117

FSSB DISCONNECTION (AMPn -> SDUm) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

118

FSSB DISCONNECTION (SDUn -> AMPm) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

119

FSSB DISCONNECTION (SDUn -> SDUm) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

120

FSSB DISCONNECTION (MAIN <-AMP1) /LINEx

Replace the servo card, amplifier, or separate detector interface unit of  interest. It is also likely that there  may be a problem on an optical fiber  cable between the connections of  interest. It is likely that there may be  an abnormal condition in the power  supply for the right-side unit stated  in the parentheses. Check to see if  there is any abnormality in the  power supplied to the unit and if  there is any short-circuit in the cable  of the motor or encoder connected  to the unit.

121

FSSB DISCONNECTION (MAIN <-SDU1) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

122

FSSB DISCONNECTION (AMPn <-AMPm) /LINEx

123

FSSB DISCONNECTION (AMPn <-SDUm) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

124

FSSB DISCONNECTION (SDUn <- AMPm) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

An alarm was detected on the  FSSB line x.

No FSSB communication can be  performed between the units  stated in the parentheses.

Replace the servo card, amplifier, or  separate detector interface unit of  interest. It is also likely that there  may be a problem on an optical fiber  cable between the connections of  interest. It is likely that there may be  an abnormal condition in the power  supply for the right-side unit stated  in the parentheses. Check to see if  there is any abnormality in the  power supplied to the unit and if  there is any short-circuit in the cable  of the motor or encoder connected  to the unit.

125

FSSB DISCONNECTION (SDUn <-SDUm) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

126

SERVO AMP INTERNAL

DISCONNECTION

(AMPn) -> /LINEx

An alarm was detected on the FSSB line x.

Abnormal communication data  was detected in the amplifier  stated in the parentheses.

Replace the amplifier of interest.

127

SERVO AMP INTERNAL

DISCONNECTION

(AMPn) <- /LINEx

128

FSSB ALARM (UNKNOWN)

An alarm was detected on the FSSB.

Please contact FANUC after taking the system alarm log.

129

ABNORMAL POWER SUPPLY(AMPn) /LINEx

An alarm was detected on the FSSB line x.

An abnormal condition was  detected in the power for the unit  stated in the parentheses.

A voltage drop was detected in the power supplied to the unit of  

interest. Check to see if there is any  abnormality in the power supply or  power supply cable and if there is a  voltage drop in the input power due  to surge current.

130

ABNORMAL POWER SUPPLY(SDUn) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

134

FSSB LINE DATA ERROR (AMPn >..> MAIN) /LINEx

An alarm was detected on the FSSB line x.

Abnormal data was detected in  the unit stated in the  

parentheses.

Replace the unit of interest. If an alarm is issued even after the  replacement, replace the slaves  previous to the unit of interest in  succession. If the alarm lingers,  replace the servo card (or additional  axis board). It is also likely that there  may be a problem on an optical fiber  cable between the connections of  interest.

135

FSSB LINE DATA ERROR (SDUn >..> MAIN) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

138

FSSB OUT OF CORRECTION(MAIN <- AMPn) /LINEx

An alarm was detected on the FSSB line x.

A communication data error was  detected between the units  stated in the parentheses.

Replace the right-side unit stated in the parentheses. It is also likely that  there may be a problem on other  unit or an optical fiber cable between  the connections of interest.

139

FSSB OUT OF CORRECTION(MAIN <- SDUn) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

140

FSSB OUT OF CORRECTION(AMPn <- AMPm) /LINEx

141

FSSB OUT OF CORRECTION (AMPn <- SDUm) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

An alarm was detected on the  FSSB line x.

A communication data error was  detected between the units  stated in the parentheses.

Replace the right-side unit stated in  the parentheses. It is also likely that  there may be a problem on other  unit or an optical fiber cable between  the connections of interest.

142

FSSB OUT OF CORRECTION(SDUn <- AMPm) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

143

FSSB OUT OF CORRECTION(SDUn <- SDUm) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

144

FSSB OUT OF CORRECTION(MAIN -> AMPn) /LINEx

Replace the left-side unit stated in the parentheses. It is also likely that  there may be a problem on other  unit or an optical fiber cable between  the connections of interest.

145

FSSB OUT OF CORRECTION(MAIN -> SDUn) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

146

FSSB OUT OF CORRECTION(AMPn -> AMPm) /LINEx

147

FSSB OUT OF CORRECTION(AMPn -> SDUm) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

148

FSSB OUT OF CORRECTION(SDUn -> AMPm) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

149

FSSB OUT OF CORRECTION(SDUn -> SDUm) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

150

SLAVE DMA BUS FAILURE (AMPn)  /LINEx

An alarm was detected on the  FSSB line x.

An error was detected in a circuit  in the unit stated in the  

parentheses.

Replace the unit of interest.

151

SLAVE DMA BUS FAILURE (SDUn) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

152

SLAVE LSI DMA BUS FAILURE(AMPn) /LINEx

153

SLAVE LSI DMA BUS FAILURE(SDUn) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

154

SLAVE LOCAL ERROR NO.1(AMPn) /LINEx

155

SLAVE WATCH DOG ALARM(AMPn) /LINEx

156

SLAVE LOCAL ERROR NO.2(SDUn) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

157

SLAVE LOCAL ERROR NO.3(AMPn) /LINEx

158

SLAVE LOCAL ERROR NO.3(SDUn) /LINEx

Note) SDU may be replaced in the  following message.

ASVU, SDU(ANALOG),  

SDU(ANLG+DGTL), SERVO  CHECK, FSSB I/O

159

SPINDLE RAM FAILURE (AMPn) /LINEx

160

SPINDLE WATCH DOG ALARM(AMPn) /LINEx

192

ITPCON DELAYED ERROR (CNC DETECTED)

Abnormality and contradiction were detected in internal  

processing and the data etc. of  the CNC system software.

Replace the most possibly faulty component displayed on the third  line of the system alarm screen or  the system alarm log. Moreover,  please contact FANUC after taking  the system alarm log.

194

I/O LINK I ALARM

An I/O Link i communication  error occurred.

An I/O Link i communication error  occurred.

The causes are as follows:

-Instantaneous power failure,

unstable voltage or unstable power  line of the device

-Faulty wiring or incomplete contact  of communication cable

-Noise

-Faulty device  

For details, see the following  

description.

-PMC PROGRAMMING  

MANUAL(B-64513EN/03)

12.1.2 PMC System Alarm  

Messages

-This book, A.2.2 PMC System  Alarm Messages

195

I/O LINK ALARM

An I/O Link communication error occurred.

An I/O Link communication error occurred.

The causes are as follows:

-Instantaneous power failure,

unstable voltage or unstable power  line of the device

-Faulty wiring or incomplete contact  of communication cable

-Noise

-Faulty device  

For details, see the following  

description.

-PMC PROGRAMMING  

MANUAL(B-64513EN/03)

12.1.2 PMC System Alarm  

Messages

12.2 I/O LINK COMMUNICATION  ERRORS AND ACTIONS TO TAKE - This book, A.2.2 PMC System  Alarm Messages

196

PMC WATCH DOG ALARM

PMC system software is not running.

This alarm should occur when the PMC CPU is not running. Replace  the main board, the most possibly  faulty component.

197

EMBEDDED SOFTWARE SYSTEM ERROR

Abnormality was detected by I/O Link and the PMC system.

Abnormality and contradiction  were detected in internal  

processing and the data etc. of  the CNC system software.

Replace the most possibly faulty component displayed on the third  line of the system alarm screen or  the system alarm log. Since there is  a possibility that faulty component is  incorrect, please contact FANUC  after taking the system alarm log.

198

SOFTWARE SYSTEM ERROR

Abnormality and contradiction were detected in internal  

processing and the data etc. of  the CNC system software.

199

NON MASK INTERRUPT

Abnormality was detected with the PMC system and the  

addition option board, etc.

400

REGISTER ACCESS ERROR

ASIC status register access error was detected.

Replace the most possibly faulty component displayed on the third  line of the system alarm screen or  the system alarm log. Moreover,  please contact FANUC after taking  the system alarm log.

401

EXTERNAL BUS INVALID  

ADDRESS

A problem occurred on a CNC  bus.

Replace the most possibly faulty  component displayed on the third  line of the system alarm screen or  the system alarm log. In addition,  the main board, or “MASTER PCB”  or “SLAVE PCB” displayed on the  system alarm screen may be  defective.

This error may also be caused by  external noise.

Check whether there is a noise  origin around the machine and  whether the machine is grounded  properly.

402

INTERNAL BUS INVALID

ADDRESS

Access to illegal address was detected.

Replace the most possibly faulty component displayed on the third  line of the system alarm screen or  the system alarm log.

403

S-BUS TIMEOUT ERROR

A problem occurred on a CNC bus.

Replace the most possibly faulty component displayed on the third  line of the system alarm screen or  the system alarm log. In addition,  the main board, or “MASTER PCB”  or “SLAVE PCB” displayed on the  system alarm screen may be  defective.

If connecting a PC by HSSB, this  alarm might be caused by restart of  abnormal processing of PC caused  by noise, etc., or migration and  return to the standby mode by the  power management function.Check  that the power management function  is not used, power supply, or the  problematic log is not recorded at  the same time as the system alarm  in the application log and the system  log of PC.

404

ECC UNCORRECTABLE ERROR

Replace the most possibly faulty component displayed on the third  line of the system alarm screen or  the system alarm log. In addition,  the main board, or “MASTER PCB”  or “SLAVE PCB” displayed on the  system alarm screen may be  defective.

This error may also be caused by  external noise.

Check whether there is a noise  origin around the machine and  whether the machine is grounded  properly.

405

EXTERNAL BUS ARBITRATION ERROR (xxxx)

A problem occurred on a CNC bus.

Replace the most possibly faulty component displayed on the third  line of the system alarm screen or  the system alarm log.

406

INTERNAL BUS ARBITRATION ERROR (xxxx)

410

CPU LOCAL DRAM ERROR

Abnormality was detected on a CPU bus.

411

CPU BUS ILLEGAL TRANSACTION

412

CPU CORE VOLTAGE ALARM

A problem occurred in a voltage for CPU.

413

CPU CARD LADDER CODE

ERROR

Abnormality was detected in the ladder data.

414

I/O LINK COMMUNICATION  

ERROR(CH4)

Unexpected error occurred in the  CPU card.

Replace the most possibly faulty  component displayed on the third  line of the system alarm screen or  the system alarm log.

415

I/O LINK COMMUNICATION

ERROR(CH3)

416

CPU ASIC RAM PARITY ERROR

Abnormality was detected in the ASIC internal memory.

417

EXTERNAL INVALID ADDRESS RAM ACCESS

Abnormal access was detected on internal memories of ASIC.

420

SERVO LOCAL BUS ECC ERROR

Alarm was detected on a servo control bus.

421

SERVO LOCAL BUS INVALID ADDRESS

422

SERVO DMA BUS PARITY ERROR

423

DSP DETECT ERROR

Alarm was detected by servo control.

FSSB cable length may be too  long.

Please confirm FSSB cable length. If no problem, replace the most  possibly faulty component displayed  on the third line of the system alarm  screen or the system alarm log.

424

SERVO EXTERNAL SRAM PARITY ERROR

Abnormal access was detected on a servo control ram.

Replace the most possibly faulty component displayed on the third  line of the system alarm screen or  the system alarm log.

425

SERVO ASIC RAM PARITY

ERROR

Abnormal access was detected on the ram mounted in an asic  for servo control.

426

SERVO WATCH DOG ALARM

Watch dog alarm was detected in a servo control.

427

SERVO ITP WATCH DOG ALARM

Watch dog alarm was detected in a servo control.

428

DSP PWM COMMAND MISS

Write timing miss alarm of servo command was detected.

429

SERVO ITP SYNC ERROR

Deviation of the synchronous signal was detected on a servo  card.

430

SERVO DMA BUS PARITY ERROR

Parity error was detected on the data transfer bus for FSSB

431

SERVO LOCAL BUS ERROR

Alarm was detected on the servo control local bus.

432

ILLEGAL DMA OPERATION

Abnormal setting for servo control ASIC was detected.

433

FSSB LSI RAM FAILURE

Abnormal access was detected on a FSSB control ram.

434

SPINDLE DATA ERROR

Error was detected in data send from spindle amplifier

435

NOISE ON CNC UNIT (SEMG_S)

Unidentified error was detected on the internal bus of CNC.

436

DSP COMMUNICATION RAM PARITY ERROR

Abnormal access was detected on the ram mounted in an asic  for servo control.

440

GUI ASIC RAM PARITY ERROR

Access error was detected in RAM for graphic or PC function.

Replace the main board

441

TIME OUT ERROR (FROM)

Abnormal access was detected.

Replace the FROM/SRAM module. If the error still occurs, replace the  main board.

442

TIME OUT ERROR (VGAC)

Replace the main board

(LCD-mounted type).

Replace the display control board  (Stand-alone type).

443

PERIPHERAL ASIC (SIC) PARITY ERROR

A problem occurred on internal memories of ASIC on the main  board or the option board.

Replace the most possibly faulty component displayed on the third  line of the system alarm screen or  the system alarm log.

444

DETECT POWER OFF ON HSSB  UNIT

Power off or abnormality was  detected in the unit that was  connected to the HSSB of CH2.

Check the power supply or no  abnormality of the printed circuit  board of the sub-side unit which is  connected the HSSB of CH2.

445

DETECT POWER OFF ON HSSB UNIT

Power off or abnormality was detected in the unit that was  connected to the HSSB of CH1.

Check the power supply or no abnormality of the printed circuit  board of the sub-side unit which is  connected the HSSB of CH1.

446

HSSB PC SIDE LSI ERROR

Access error was detected in PC-side common RAM for  

HSSB.

Replace the printed circuit board on which the PC-side HSSB circuit is  mounted.

447

HSSB COMMUNICATION ERROR(CH2)

A problem occurred in HSSB communication of CH2.The  problem of power supply system,  the influence of external noise,  connector contact failure, cable  disconnection, or a failure of  both sides of the printed circuit  board is considered.

Replace both sides of the HSSB printed circuit board of CH2. If the  error still occurs, replace the HSSB  cable of CH2.

448

HSSB COMMUNICATION ERROR(CH1)

A problem occurred in HSSB communication of CH1.The  problem of power supply system,  the influence of external noise,  connector contact failure, cable  disconnection, or a failure of  both sides of the printed circuit  board is considered.

Replace both sides of the HSSB printed circuit board of CH1. If the  error still occurs, replace the HSSB  cable of CH1.

449

HSSB ASIC RAM PARITY ERROR

Parity error was detected in the common RAM for HSSB on the  main board.

Please contact FANUC.

450

I/O LINK COMMUNICATION

ERROR (CH1)

Unexpected error occurred in the PMC system.

Replace the most possibly faulty component displayed on the third  line of the system alarm screen or  the system alarm log.

451

I/O LINK COMMUNICATION

ERROR (CH2)

453

NETWORK(PHI) EXTERNAL ERROR

Abnormality was detected in the network system.

454

SYSTEM OVERHEAT (CONTROL UNIT) AND SHUTDOWN

Abnormal high temperature was detected in the CNC control unit.

Please make sure ambient

temperature of CNC control unit is  within the specified temperature. Please make sure fans are running  properly.

If there is no abnormality in the  above, replace the main board.

455

FAN MOTOR STOP AND

SHUTDOWN

A fault occurred in the fan on the CNC control unit.

Replace the fan.

456

NETWORK(PHI) SOFTWARE NMI

Abnormality was detected in the network system software.

Replace the most possibly faulty component displayed on the third  line of the system alarm screen or  the system alarm log.

457

NETWORK(PHI) DRAM PARITY ERROR

Abnormality was detected in the memory on the network system.

458

NETWORK(PHI) SRAM PARITY ERROR

459

PMC ASIC SRAM PARITY ERROR

Abnormality was detected in the memory on the PMC system.

Replace the main board.

460

PMC DRAM PARITY ERROR

461

PMC SOFT NMI

Abnormality was detected in the PMC system software.

462

PMC ITP WATCH DOG ALARM

Abnormality was detected in the interface between the CNC and  PMC.(ITP signal fault)

463

UNDEFINITION HARDWARE  ERROR

Undefined hardware error was  detected.

Replace the most possibly faulty  component displayed on the third  line of the system alarm screen or  the system alarm log.

464

ASIC VOLTAGE ALARM

A problem occurred in a voltage for ASIC.

Replace the main board.

500

SRAM DATA ERROR (SRAM MODULE)

Abnormality of SRAM data on FROM/SRAM module was  detected.

Check the voltage of back up battery. And check if it had been left  removing the case unit of  

LCD-mounted type CNC.  

If you meet the above, it is not  hardware failure. So, after replacing  the battery and attaching the case  unit, perform a memory all clear  operation and start up the CNC.  If you do not meet the above,  replace FROM/SRAM module. If the  above action does not solve the  trouble, replace the main board.

501

SRAM DATA ERROR (BATTERY LOW DURING POWER OFF)

Lowering the voltage of the battery during power off and  abnormality of SRAM data on  FROM/SRAM module was  detected.

502

NOISE ON POWER SUPPLY

A power fault occurs. Noise or an instantaneous power failure  occurred in the CNC power  supply.

Find and remove the cause of the error.

This error may damage SRAM data.

503

ABNORMAL POWER SUPPLY (MAIN BOARD)

A fault occurred in the power supply on the main board.

Check if it had been occurred noise or an instantaneous power failure to  the input power supply of CNC  (DC24V). Replace the power supply  unit on the main board.