Fanuc system alarms and error codes for feedback, axis control and system alarms. Further alarms will be appended to other pages. Covering system 3, 6, 10, 11, 15, 0A, 0B, 0-C, 16, 18, 21, 16i/18i/21i and others. This is not an exhaustive or complete alarm list for every control; there are thousands of different alarms. Contact us or contact your local CNC machine tool maintanence engineer.
300 series alarms
3n0
Manual reference position is required for the nth axis.
3n1
nth axis communication error. Failure in data transmission.
3n2
nth axis APC overtime error.
3n3
nth axis APC overtime error. Failure in data transmission.
3n4
nth axis APC Paraity error. Failure in data transmission.
3n5
nth axis APC pulse error alarm.
3n6
nth axis APC battery voltage has decreased to a low level so that data cannot be held.
3n7
nth axis axis APC battery voltage reached a level where the battery must be renewed
3n8
nth axis axis APC battery voltage reached a level where the battery must be renewed( including when power is OFF)
3n9
The n axis ( axis 1-8) pulse coder has a fault.
400 series alarms
400
1-axis, 2-axis overload signal is on.
401
1-axis, 2-axis servo amplifier READY signal (DRDY) went off.
402
3 axis, 4 axis overload signal is on.
403
3-axis, 4 axis servo amplifier READY signal (DRDY) went off.
404
Even though the n-th axis ( axis 1-8) READY signal ( DRDY) is still on. Or, when the power was turned on, DRDY went on even though MCON was off.
405
Position control system fault.
406
7-axis, 8-axis overload signal is on.
4n0
The position deviation value when the n-th axis stops is larger than the set value.
4n1
The position deviation value when the n-th axis stops is larger than the set value.
4n3
The contents of the error register for the n-th axis exceeded power.
4n4
N-th axis digital servo system fault.
4n5
A speed higher than 4000000 units/s was attempted to be set in the n-th axis.
4n6
Position detection system fault in the n-th axis pulse coder ( disconnecton alarm).
4n7
This alarm occurs when the n-th axis is in one of the conditions below:The value set in Parameter no 8n20 (motor form) is out of the specified limit. A proper value ( 111 or -111) is not set in parameter no 8n22.( motor revolution direction).Illegal data ( a value below 0, etc) was set in parameter No 8n23 ( number of speed feedback pulses per motor revolution)Illegal data ( a value below 0, etc) was set in parameter No 8n24 ( number of speed feedback pulses per motor revolution)Parameters No. 8n84 and No. 8n85 (flexible field gear rate) have not been set.An axis selection parameter ( from No.269 to 274 is incorrect.An overflow occured during parameter computation.
490
5-axis, 6-axis overload signal is on.
491
5-axis, 6-axis servo amplifier READY signal (DRDY) went off.
494
The axis card ready signal ( MCON) for axes 5 and 6 is off, but the servo amplifier ready signal (DRDY) is not. Alternatively when the power is applied, the DRDY is on and the MCON is not.
495
This is a position control circuit error.
900 series alarms
910
This RAM parity error is related to low-order-by-test.
911
This RAM parity error is related to the low-order bytes.
912
This RAM parity error is related to the low-order bytes of RAM shared with the digital servo circuit.
913
This parity error is related to high-order bytes of RAM shared with the digital servo cicuit.
914
This is a local RAM parity error in the digital servo circuit.
915
This RAM parity error is related to low order bytes of the ladder editing cassette.
916
This RAM parity error is related to the high order bytes of the ladder editing cassette.
920
This is a watchdog timer aalrm or a servo system alarm for axis 1 to 4.
921
This is a watchdog timer alarm related to the sub-CPU board or a servo system alarm for axis 5 or 6.
922
This is a servo system alarm related to axis 7 or 8.
930
Replace the master PC board.
940
PC board installation is incorrect. Check the specification of the PC board.
941
The memory PC board is not connected securely.
945
The hardware configuration is incorrect for the serial spindle, or a communication alarm occured.
946
Communication is impossible with the second serial spindle.
950
A fuse has blown
960
This is a sub-CPU error.
998
This is a ROM parity error.
5000 series alarms
5136
FSSB: number of amp is small
5137
FSSB: configuration error
If you are looking for other alarms please visit our FANUC ALARMS page
