FANUC Series 16i, 18i, 21i Alarms

Fanuc Series 16i, 18i, 21i Alarms, Error Codes

Fanuc Series 16i, 18i and 21i Alarms.

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These alarm codes relate to both Model A & B.  NB: * denotes model B additional alarms.

 

Background Edit Alarm

Alarm Code Type Description of Alarms/ Faults
??? BP/S alarm BP/S alarm occurs in the same number as the P/S alarm that occurs in ordinary program edit.
140 BP/S alarm It was attempted to select or delete in the background a program being selected in the foreground ( note)

Note: Alarm in background edit is displayed in the key input line of the background edit screen instead of the ordinary alarm screen and is resettable by any of the MDI key operation.

 

Absolute pulse coder (APC) alarm

Alarm Code Type Description of Alarms/ Faults
300* nth axis origin return Manual reference position return is required for the nth-axis (n=1-8)
301* APC alarm: nth axis communication nth axis (n=1-8) APC communication error. Failure in data transmission.
302* APC alarm: nth axis over time nth axis( n=1-8) APC overtime error. Failure in data transmission.
303* APC alarm: nth axis framing nth axis (n=1-8) APC framing error. Failure in Data transmission.
304* APC alarm: nth axis parity nth axis (n=1-8) APC parity error. Failure in Data transmission.
305* APC alarm:nth axis pulse error nth axis (n=1-8) APC pulse error alarm.
306* APC alarm: nth axis battery voltage 0 nth axis (n=1-8) APC battery voltage has decreased to a low level so that the data cannot be held.
307* APC alarm: nth axis battery low 1 nth axis (n=1-8) APC battery voltage reaches a level where the battery must be renewed.
308* APM alarm: nth-axis battery low 2 nth axis (n=1-8) APC battery voltage has reached a level where the battery must be renewed ( including when the power is OFF).
309*  APC ALARM: n AXIS ZRN IMPOSSIBLE  Return to the origin has been attempted without first rotating the motor one or more times.

 

Serial Pulse Coder ( SPC) alarms

 

Alarm Code Type Description of Alarms/ Faults
360  n-AXIS: ABNORMAL CHECKSUM (INT) A checksum error occured in the built in pulse coder.
361  n-AXIS: ABNORMAL PHASE DATA (INT) A phase data error occured in the built in pulse coder.
362  n-AXIS: ABNORMAL REV.DATA (INT) A rotation speed count error occured in the built in pulse coder.
363  n-AXIS: ABNORMAL CLOCK (INT) A clock error occured in the built in pulse coder.
364  n-AXIS: SOFT PHASE ALARM(INT) The digital servo software detected invalid data in the built in pulse coder.
365  n-AXIS: BROKEN LED (INT) An LED error occured in the built in pulse coder.

 
366

 

  n-AXIS: PULSE MISS (INT) A pulse error occured in the built in pulse coder.
367  n-AXIS: COUNT MISS (INT) A count error occured in the built in pulse coder.
368  n-AXIS: SERIAL DATA ERROR (INT) Communication data from the built in pulse coder cannot be received.
369  n-AXIS: DATA TRANS; ERROR (INT) A CRC or stop bit error occured in the communication data being received from the built in pulse coder.
380  n-AXIS: BROKEN LED (EXT) The seperate detector is erroneous.
381  n-AXIS: ABNORMAL PHASE (EXT) A phase data error occured in the seperate linear scale.
382  n-AXIS: COUNT MISS (EXT) A pulse error occured in the seperate detector.
383  n-AXIS: PULSE MISS (EXT) A count error occured in the seperate detector.
384  n-AXIS: SOFT PHASE ALARM(EXT) The digital servo software detected invalid data in the seperate detector.
385  n-AXIS: SERIAL DATA ERROR (EXT) Communication data from the seperate detector cannot be received.
386  n-AXIS: DATA TRANS. ERROR(EXT) A CRC or stop bit error occured in the communication data being received from the seperate detector.
387*   n-AXIS: ABNORMAL ENCODER ( EXT) An error occurs in the seperate detector.

Servo Alarms

Alarm Code Type Description of Alarms/ Faults
401 SERVO ALARM: n-TH AXIS VRDY OFF The n-th axis (axis 1-8) servo amplifier READY signal (DRDY) went off.
402 SERVO ALARM: SV CARD NOT EXIST The axis control card is not provided.
403 SERVO ALARM: CARD/SOFT MISMATCH The combination of the axis control card and servo software is illegal.
404 SERVO ALARM: n-TH AXIS VRDY ON Even though the n-th axis ( axis 1-8) READY signal (MCON) went off the servo amplifier READY signal (DRDY) is still on. Or when the power was turned on, DRDY went on even though MCON was off.
405 SERVO ALARM: (ZERO POINT RETURN FAULT) Position control system fault. Due to an NC or servo system fault in the reference positon return, there is a possibility that the reference position return could not be executed properly.
407 SERVO ALARM: EXCESS ERROR The difference in synchronous axis position deviation exceeded the set value.
409 SERVO ALARM: n XIS TORQUE ALARM Abnormal servo motor load has been detected. Alternatively, abnormal spindle motor load has been detected in Cs mode.
410 SERVO ALARM: n-TH AXIS-EXCESS ERROR The position deviation value when the n-th axis ( axis 1-8) stops is larger than the set value.
411 SERVO ALARM: n-TH AXIS- EXCESS OVERFLOW The position deviation value when the n-th axis ( axis 1-8) moves is larger than the set value.
413 SERVO ALARM: n-th AXIS- LSI OVERFLOW The contents of  error register for the n-th axis ( axis 1-8) exceeded    power.
415 SERVO ALARM: n-AXIS: EXCESS SHIFT A speed higher than 524288000 units/s was attempted to be set in the n-th axis (axis 1-8).
417 SERVO ALARM: n-AXIS: PARAMETER INCORECT This alarm occurs when the n-th axis is in one of the below states: (digital servo system alarm).

  1. The value set in Parameter NO. 2020( motor form) is out of teh specified limit.
  2. A proper value (111 or -111) is not set in parameter No. 2022 (motor revolution direction).
  3. Illegal data (a value below 0, etc) was set in parameter No. 2023 (number of position feedback pulses per motor revolution).
  4. Illegal data ( a value below 0 etc) was set in parameter No. 2024 (number of position feedback pulses per motor revolution).
  5. Parameters No. 2084 and No. 2085 ( flexible field gear rate) have not been set.
  6. A value outside the limit of {1 to the number of control axes) or a non continuous value ( Parameter 1023 ( servo  axis number) contains a value out of the range from 1 to the number of axes, or an isolated value ( for example 4, not preceded by 3). was set in parameter No 1023 ( servo axis number).
420 SERVO ALARM: n-AXIS: SYNC TORQUE( M axis) During simple synchronous control, the difference between the torque commands for the master and slave axes exceeded the value set in parameter no 2078 and2079.
421 SERVO ALARM: n-AXIS: EXCESSer (D) The difference between the errors in the semi closed loop and closed loop has become excessive during the dual position feedback.
422 SERVO ALARM: n-AXIS In torque control of PMC axis control, a specified allowable speed has been executed.
423 SERVO ALARM: n-AXIS In torque control of PMC axis control, the parameter set allowable cumulative travel distance has been executed.
430 n AXIS: SV.MOTOR OVERHEAT A servo motor overheat occured.
431 n AXIS: CNV. OVERLOAD 1. PSM : Overheat occured.

2. Beta series SVU: Overhead occured.
432 n AXIS: CNV.LOWVOLT CON./POWFAULT 1. PSM: Phase missing occured in the input voltage

2. PMSR: The control power supply voltage has dropped.

3. Alpha Series SVU: The control power supply voltage has dropped.
433 n AXIS: CNV: LOW VOLT DC LINK
  1. PSM: The DC link voltage has dropped.
  2. PSMR: The DC link voltage has dropped.
  3. Alpha series SVU: The DC link voltage has dropped.
  4. Beta series SVU: The DC link voltage has dropped.
434 n AXIS: INV. LOW VOLT CONTROL SVM: The control power supply voltage has dropped.
435 n AXIS: INV. LOW VOLT DC LINK SVM: The DC Link Voltage has dropped.
436 n AXIS: SOFTTHERMAL (OVC) The digital servo software detected the soft thermal state (OVC).
437 n AXIS: OVERCURRENT POWER PSM: Overcurrent flowed into the input circuit.
438 n AXIS: INV: ABNORMAL CURRENT 1. SVM: The motor current is too high

2. Alpha series: The motor current is too high.

3. Beta series. The motor current is too high.
439 n AXIS:CNV. OVERVOLT POWER 1. PSM: The DC voltage is too high.

2. PSMR: The DC voltage is too high.

3. Alpha series SVU: The C link voltage is too high.

4. Beta serie SVU: The link voltage is too high.
440 n AXIS:CNV. EX DECELERATION POW. 1. PSMR: The regeneration discharge amount is too large.

2. Alpha series SVU: The regeneration discharge amount is too large. Alternatively, the regeneration discharge ciruit is abnormal.

 
441 n AXIS: ABNORMAL CURRENT OFFSET The digital servo software detected an abnormality in the motor current detection circuit.
442 n AXIS: CNV. CHARGE FAULT/INV DB 1. PSM. The spare discharge circuit of the DC link is abnormal.

2. PSMR: The spare discharge circuit of the DC link is abnormal.

3. Alpha series SVU: The dynamic brake cicruit is abnormal.
443 n AXIS: COOLING FAN FAILURE 1. PSM: The internal stirring fan failed.

2. PSMR: The internal stirring fan failed.

3. Beta series SVU: The internal stirring fan failed.
444 n AXIS: COOLING FAN FAILURE SVM: The internal stirring fan failed.
445 n AXIS: SOFT DISCONNECT ALARM The digital servo software detected a broken wire in the pulse coder.
446 n AXIS: HARD DISCONNECT ALARM A broken wire in the built in pulse coder was detected by hardware.
447 n AXIS: HARD DISCONNECT (EXT) A broken wire in the seperate detector was detected by hardware.
448 n AXIS: UNMATCHED FEEDBACK ALARM The sign of feedback data from the built in pulse coder differs from that of a feedback data from the seperate detector.
449 n AXIS: INV. IPM ALARM 1. SVM: IPM ( intelligent power module) detected an alarm.

2. Alpha series SVU: IPM ( intelligent power module) detected an alarm.
453* n AXIS: SPC SOFT DISCONNECT ALARM Software disconnection alarm of the a pulse coder.
460 n AXIS: FSSB DISCONNECT FSSB communication was disconnected suddenly. The possible causes are as follows:

1. The FSSB communication cable was disconnected or broken.

2. The power to the amplifier was turned off suddenly.

3. A low voltage alarm was issued by the amplifier.
461 n AXIS: ILLEGAL AMP INTERFACE The axes of the 2- axis amplifier were assigned to the fast type interface.
462 n AXIS: SEND CNC DATA FAILED Because of an FSSB communication error, a slave could not receive correct data.
463 n AXIS: SEND SLAVE DATA FAILED Because of an FSSB communication error, the servo system could not receive correct data.
464 n AXIS: WRITE ID DATA FAILED An attempt was made to write maintenance informatio on the amplifier maintenance screen but it failed.
465 n AXIS: READ ID DATA FAILED At power up, amplifier initial ID information could not be read.
466 n AXIS: MOTOR/AMP COMBINATION The maximum current rating for the amplifer does not match that for the motor.
467 n AXIS: ILLEGAL SETTING OF AXIS The servo function for the following has not been enabled when an axis occupying a single DSP ( corresponding to two ordinary axes) is specified on the axis setting screen.

  1. Learning control (bit 5 of parameter NO. 2008=1)
  2. High speed current loop (bit 0 of parameter NO.2004=1)
  3. High speed interface axis (bit 4 of parameter NO. 2005=1)

 

Over Travel Alarms

Alarm Code Type Description of Fault/Error
500 OVER TRAVEL Exceeded the n-th axis (axis 1-8) + side stored stroke check I.
501 OVER TRAVEL Exceeded the n-th axis (axis 1-8) – side stored stroke check I.
502 OVER TRAVEL Exceeded the n-th axis (axis 1-8) +side stored stroke check II.
503 OVER TRAVEL Exceeded the n-th axis (axis 1-8) – side stored stroke check II.
504 OVER TRAVEL Exceeded the n-th axis (axis 1-8) +side stored stroke check III
505 OVER TRAVEL Exceeded the n-th axis (axis 1-8) – side stored stroke check III
506 OVER TRAVEL Exceeded the n-th axis (axis 1-8) + side hardware OT.
507 OVER TRAVEL Exceeded the n-th axis (axis 1-8) – side hardware OT.
508 INTERFERENCE A tool moving in the positive direction along the n axis has fouled another tool post.
509 INTERFERNECE A tool moving in the negative direction along the n axis has fouled another tool post.
510 OVER TRAVEL Alarm for stroke check prior to movement. The end point specified in a block falls within the forbidden area defined with the stroke check in the positive direction along the N axis.
511 OVER TRAVEL Alarm for stroke check prior to movement. The end point specified in a block falls within the forbidden area defined with the stroke check in the negative direction along the N axis.

 

Overheat Alarms

Alarm Code Type Description of Fault/Error
700 OVERHEAT: CONTROL UNIT Control unit overheat.
701 OVERHEAT: FAN MOTOR The fan motor on top of the cabinet for the control unit is overheated.
704 OVERHEAT: SPINDLE Spindle overheat in the spindle fluctuation detection .

 

Rigid Tapping Alarms

Alarm Code Type Description of Fault/Error
740 RIGID TAP ALARM: EXCESS ERROR The positional deviation of the stopped spindle has exceeded the set value during rigid tapping.
741 RIGID TAP ALARM: EXCESS ERROR The positional deviation of the moving spindle has exceeded the set value during rigid tapping.
742 RIGID TAP ALARM: LSI OVERFLOW An LSI overflow has occurred for the spindle during rigid tapping.

 

Serial Spindle Alarms

Alarm Code Type Description of Fault/Error
749 S-SPINDLE LSI ERROR It is serial communication error while system is executing after power supply is on.
750 SPINDLE SERIAL LINK START FAULT This alarm is generated when the spindle control unit is not ready for starting correctly when the power is turned on in the system with the serial spindle.
752 FIRST SPINDLE MODE CHANGE FAULT This alarm is generated if the system does not properly terminate a mode change. The modes include the Cs contouring, spindle positioning, rigid tapping and spindle control modes.
754 SPINDLE-1 ABNORMAL TORQUE Abnormal first motor load has been detected
762 SECOND SPINDLE MODE CHANGE FAULT Refer to alarm No 752 for the 2nd axis
764 SPINDLE-2 ABNORMAL TORQUE Same as alarm number 754 for the second spindle
772 SPINDLE-3 MODE CHANGE ERROR Same as alarm number 752 for the third spindle
774 SPINDLE 3 ABNORMAL TORQUE ALARM Same as alarm number 754 for the third spindle
782 SPINDLE 4 MODE CHANGE ERROR Same as alarm number 752 for the fourth spindle
784 SPINDLE 4 ABNORMAL TORQUE ALARM Same as alarm number 754 for the fourth spindle

 

System Alarms * ( Model B )

Alarm Code Type Description of Fault/Error
900 ROM PARITY A parity error ocured in the CNC, macro, or servo ROM.
910 SRAM PARITY: (BYTE 0 ) A RAM parity error occured in the part program storage RAM.
911 SRAM PARITY: (BYTE 1 ) A RAM parity error occured in the part program storage RAM.
912 DRAM PARITY: (BYTE 0 ) A RAM parity error occured in the DRAM module.
913 DRAM PARITY: (BYTE 1 ) A RAM parity error occured in the DRAM module.
914 DRAM PARITY: (BYTE 2 ) A RAM parity error occured in the DRAM module.
915 DRAM PARITY: (BYTE 3 ) A RAM parity error occured in the DRAM module.
916 DRAM PARITY: (BYTE 4 ) A RAM parity error occured in the DRAM module.
917 DRAM PARITY: (BYTE 5 ) A RAM parity error occured in the DRAM module.
918 DRAM PARITY: (BYTE 6 ) A RAM parity error occured in the DRAM module.
919 DRAM PARITY: (BYTE 7 ) A RAM parity error occured in the DRAM module.
920 SERVO ALARM ( 1-4 AXIS ) Servo alarm ( 1st to 4th axis). A watchdog alarm condition occured, or a RAM parity error occured in the axis control card.
921 SERVO ALARM ( 5-8 AXIS ) Servo alarm ( 5th to 8th axis). A watchdog alarm condition occured, or a RAM parity error occured in the axis control card.
926 FSSB ALARM FSSB alarm.
930 CPU INTERRUPT CPU error (abnormal interrupt).
935 SRAM ECC ERROR An error occured in RAM for part program storage.
950 PMC SYSTEM ALARM

PCxxx YYYYYYYYYYYY

 An error occured in the PMC.
951 PMC WATCH DOG ALARM An error occured in the PMC.
970 NMI OCCURED IN PMCLSI With the PMC-SA1, an error occured in the PMC control LSI device on the motherboard ( I/O RAM parity).
971 NMI OCCURED IN SLC With the PMC-SA1, an I/O Link disconnection was detected.
972 NMI OCCURED IN OTHER MODULE An NMI occured on a board other than the motherboard.
973 NON MASK INTERRUPT An NMI occured as a result of an unknown cause.
974 F-BUS ERROR A bus error occured on the Fanuc Bus.
975 BUS ERROR A bus error occure don the motherboard.
976 L-BUS ERROR A bus error occured on the local bus.