FANUC Series 0 Alarms and Error Codes

The following alarm codes pertain to the FANUC A06B-6062, A06B-6063, A06B-6064 series. Knowing your error code could help us provide you with the fast and precise evaluation for repair or exchange services.

Background Edit Alarms

Alarm CodeDescription of Alarm/Error
BP/S alarm is produced with the same number as P/S alarm taking place in normal program editing. (070, 071, 072, 073, 074 etc.)
140An attempt was made to select or delete a program being selected in the foreground.

FANUC 0 Series Power Supply Alarms

Alarm CodeDescription of Alarm/Error
000A parameter which requires the power off was input, turn off power.
001TH alarm ( A character with incorrect parity was input.
002TV alarm ( The number if characters in a block is odd).
003Data exceeding the maximum allowable number of digits was input.
004A numeral of the sign “-” was input without an address at the beginning of a block.
005The address was not followed by the appropriate data but was not followed by another address or EOB code.
006Sign “-” input error ( Sign “-” was input after an address with which it cannot be used. Or two or more “-” signs were input)
007 Decimal point “-” input error.
009 Unusable character was input insignificant area.
010An unusable G code was commanded.
011Feedrate was not commanded to a cutting feed or the feedrate was inadequate.
014In variable lead threading the lead incremental and decremental outputted by address K exceed the maximum command value or a command such that the lead becomes a negative value is given.
015The number of the commanded axes exceeded that of simultaneously controlled axes.
021An axis not included in the selected plane was commanded in circular interpolation.
023In circular interpolation by radius designation negative value was commanded for address R.
029The offset value is too large.
030The offset number specified by * code for tool length offset.
031In setting an offset amount by G10, the offset number following address P was excessive or it was not specified.
032In setting an offset amount by G10, the offset amount was excessive.
033A point of intersection cannot be determined for cutter compensation C/ Tool nose radius compensation.
034The start up or cancel was going to be performed in the G02 or G03 mode in cutter compensation C/tool nose radius compensation.
035G39 is commanded in cutter compensation B cancel mode or on the plane other than offset plane/Ship cutting (G31 was specified in tool nose radius compensation mode.
036Skip cutting (G31) was specified in cutter compensation mode.
037G40 ( offset cancel) is commanded at the plane other than the offset plane in cutter compensation B.
038Overcutting will occur in cutter compensation C because the arc start point or end point coincides with the arc centre
039Chamfering or corner R was specified with a start up, a cancel, or switching between G41 and G42 in tool nose radius compensation.
040Overcutting will occur in tool nose radius compensation in a canned cycle G90 or G94.
041Overcutting will occur in cutter compensation C/ tool radius compensation.
044One of G27 to G30 is commanded in canned cycle mode.
050The chamfering or a corner R was specified in a block which includes a thread cutting command.
051The block after a block containing a chamfering or a corner R specification was not a G01 command.
052The move direction  or the move amount in a block following chamfering  or a corner R command was not adequate.
0532 or more of I, K and R are directed in chamfering and corner radius R command or C or R does not come after a comma (,) in direct drawing dimension programming.
054A block in which the chamfering or the  corner R was specified includes a taper command.
055The move distance in the block which includes the chamfering or the corner R specification is smaller than the chamfering amount
056Both end point and angle are not designated in the next block command of the angle designation block (A_).
057Block end point is not calculated correctly in direct dimension drawing programming.
058Block end point is not found in direct dimension drawing programming.
059The program with the selected number cannot be searched in external program number search.
060Commanded sequence number was not found in the sequence number search.
061Address P or Q is not specified in G70, G71, G72 or G73 command.
062The depth of  cut in G71 or G72 is zero or negative value.
063 The sequence number specified by address P in G70, G71, G72 or G73 command cannot be searched.
065G00 or G01  is not commanded at the block with the sequence number which is specified in address P in G71, G72 or G73 command.
066An allowable G code was commanded between two blocks specified by address P and Q in G71, G72, G73.
067G70, G71, G72 or G73 command with address P and Q was specified in MDI mode.
069The final move command in the blocks specified by P and Q of G70, G71, G72 and G73 ended with chamfering or corner R.
070The memory area is insufficient.
071The address to be searched was not found. Or the program with specified program number was not found in program number search.
072The number of programs to be stored exceeded 63 or 125.
073The commanded program number has already been used.
074The program number is other than 1 to 9999.
076Address P was not commanded in the block which includes an M98 or a G65 command.
077The subprogram was called in three or five folds.
078A program number or a sequence number which was specified by address P in the block which includes an M98, M99 or G66 was not found.
079The contents of the program stored in the memory did not agree with that in tape in collection.
080In the area specified by parameter E, the measuring position reach signal does not come on.
081Automatic tool compensation was specified without a T code.
082T code and automatic tool compensation were specified in the same block.
083In automatic tool compensation an invalid axis was specified or the command is incremental.
085When entering data in the memory by using ASR or Reader/puncher interface , an overrun, parity or framing error was generated. The number of bits or input data or setting of baud rate is incorrect.
086When entering data in the memory by using Reader/puncher interface , the ready signal (DR) of reader/puncher was turned off/.
087When entering data in the memory by using Reader/puncher interface , though the read terminate command is specified input is not interrupted after 10 characters read.
090The reference point return cannot be performed normally because the reference point return start point is too close to the reference point or the speed is too slow.
092The commanded axis by G27 did not return to the reference point.
094 P type cannot be specified when the program is restarted.
095 P type cannot be specified when the program is restarted.
096 P type cannot be specified when the program is restarted.
097 P type cannot be specified when the program is restarted
098A command of the program restart was specified without the reference point return operation after power ON and emergency stop and G28 was found during search.
099After completion of search in program restart, a move command is given with MDI.
100Setting data PWE is set to 1. Turn it to 0 and reset the system.
101The power was turned off while rewriting the contents of the memory in the part program storage and editing operation.
111The calculation result of macro instruction exceeds the allowable range.
112Division by Zero was specified. ( including tan 90 degrees)
114An undefined H code is designated in G65 block.
115A value not defined as a variable number is designated.
116The variable number designated with P is forbidden for assignment.
119The argument of SQRT or BCD is negative.
122The macro model call is specified in double.
125In the block with G65, the unusable address was specified..
128The sequence number specified in the brand command was not 0 to 9999. Or, it cannot be searched.
130In 3rd axis control, a 3rd axis control command was given by PMC during Cf control.
135Without any spindle orientation, an attempt was made for spindle indexing.
136A move command of other axes was specified to the same block as spindle indexing addresses C, H.
137A move command of other axes was specified to the same block as M code related to spindle indexing.

FANUC 0 Series Absolute Pulse Coder (APC) Alarms

Alarm CodeTypeDescription
3n0nth-axis origin returnManual reference position is required for the nth axis.
3n1APC alarm: nth axis communicationnth axis communication error. Failure in data transmission.
3n2APC alarm: nth axis over timenth axis APC overtime error.
3n3APC alarm: nth axis framingnth axis APC overtime error. Failure in data transmission.
3n4APC alarm: nth axis paritynth axis APC Paraity error. Failure in data transmission.
3n5APC alarm: nth axis pulse errornth axis APC pulse error alarm.
3n6APC alarm: ntha xis battery voltage 0nth axis APC battery voltage has decreased to a low level so that data cannot be held.
3n7APC alarm: nth axis battery low 1nth axis axis APC battery voltage reached a level where the battery must be renewed
3n8APC alarm: nth axis battery low 2nth axis axis APC battery voltage reached a level where the battery must be renewed (including when power is OFF)
3n9SPC ALARM: n AXIS PULSE CODERThe n axis (axis 1-8) pulse coder has a fault.

FANUC Series 0 Servo Alarms

Alarm CodeTypeDescription of Alarm/Error
400SERVO ALARM: 1, 2th AXIS OVERLOAD1-axis, 2-axis overload signal is on.
401SERVO ALARM: 1, 2th AXIS VRDY OFF1-axis, 2-axis servo amplifier READY signal (DRDY) went off.
402SERVO ALARM: 3, 4th AXIS OVERLOAD3 axis, 4 axis overload signal is on.
403SERVO ALARM: 3, 4th AXIS VRDY OFF3-axis, 4 axis servo amplifier READY signal (DRDY) went off.
404SERVO ALARM: n-th AXIS VRDY ONEven 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.
405SERVO ALARM: ZERO POINT RETURN FAULTPosition control system fault.
406SERVO ALARM: 7, 8th AXIS OVERLOAD
7th, 8th AXIS VRDY OFF
7-axis, 8-axis overload signal is on.
4n0SERVO ALARM: n-th AXIS -EXCESS ERRORThe position deviation value when the n-th  axis stops is larger than the set value.
4n1SERVO ALARM: n-AXIS-EXCESS ERRORThe position deviation value when the n-th axis stops is larger than the set value.
4n3SERVO ALARM: n-th AXIS -LSI OVERFLOWThe contents of the error register for the n-th axis exceeded power.
4n4SERVO ALARM: n-th AXIS DETECTION RELATED ERRORN-th axis digital servo system fault.
4n5SERVO AALRM: n-th AXIS- EXCESS SHIFTA speed higher than 4000000 units/s was attempted to be set in the n-th axis.
4n6SERVO ALARM: n-th AXIS -DISCONNECTIONPosition detection system fault in the n-th axis pulse coder ( disconnecton alarm).
4n7SERVO ALARM: n-th AXIS-PARAMETER INCORRECTThis alarm occurs when the n-th axis is in one of the conditions below:
  1. The value set in Parameter no 8n20 (motor form) is out of the specified limit.
  2.  A proper value ( 111 or -111) is not set in parameter no 8n22.( motor revolution direction).
  3. Illegal data ( a value below 0, etc) was set in parameter No 8n23 ( number of speed feedback pulses per motor revolution).
  4. Illegal data ( a value below 0, etc) was set in parameter No 8n24 ( number of speed feedback pulses per motor revolution).
  5. Parameters No. 8n84 and No. 8n85 (flexible field gear rate) have not been set.
  6. An axis selection parameter ( from No.269 to 274 is incorrect.
  7. An overflow occured during parameter computation.
490SERVO ALARM: 5th AXIS OVERLOAD5-axis, 6-axis overload signal is on.
491SERVO ALARM: 5, 6th AXIS VRDY ON5-axis, 6-axis servo amplifier READY signal (DRDY) went off.
494SERVO ALARM: 5, 6th AXIS VRDY ONThe 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.
495SERVO ALARM: 5, 6th AXIS ZERO POINT RETURNThis is a position control circuit error.

FANUC Series 0 Overtravel Alarms

Alarm Code.Description of Alarm/Error
510Overtravel to exceed the (+) stroke limit of the X-axis.
511Overtravel to exceed the (-) stroke limit of the X-axis.
5122nd stroke limit at + side of X axis was exceeded.
5132nd stroke limit at + side of X axis was exceeded.
520Overtravel to exceed the (+) stroke limit of Y axis (M) or Z-axis (T).
521Overtravel to exceed the (-) stroke limit of Y axis (M) or Z-axis (T).
5222nd stroke limit at + side of Z axis was exceeded.
5232nd stroke limit at – side of X axis was exceeded.
530Overtravel to exceed the (+) stroke limit of Z-axis.
531Overtravel to exceed the (-) stroke limit of Z-axis.
540Overtravel to exceed the (+) stroke limit of the 4th axis.
541Overtravel to exceed the (-) stroke limit of the 4th axis.

FANUC Series 0 Programmable Machine Control (PMC), Models L/M Alarms

Alarm CodeDescription of Alarm/Error
600Interruption by illegal command is occurred.
601PMC RAM parity error is occured.
602PMC serial transmission error is occurred.
603PMC watch dog error is occurred.
604PMC ROM parity error is occurred.
605LADDER contents which can be stored in PMC is exceeded.

FANUC Series 0 Overheat Alarms

Alarm CodeDescription of Alarm/Error
700Master PCB is overheated.
702X, Y, (M), or Z axis servo motor is overheated.
7034th axis servo motor is overheated.

FANUC Series 0 System Alarms

Alarm CodeTypeDescription of Alarm/Error
910MAIN RAM PARITYThis RAM parity error is related to low-order-by-test.
911MAIN RAM PARITYThis RAM parity error is related to the low-order bytes.
912SHARED RAM PARITYThis RAM parity error is related to the low-order bytes of RAM shared with the digital servo circuit.
913SHARED RAM PARITYThis parity error is related to high-order bytes of RAM shared with the digital servo cicuit.
914SERVO RAM PARITYThis is a local RAM parity error in the digital servo circuit.
915LADDER EDITING CASSETTE RAM PARITYThis RAM parity error is related to low order bytes of the ladder editing cassette.
916LADDER EDITING CASSETTE RAM PARITYThis RAM parity error is related to the high order bytes of the ladder editing cassette.
920WATCHDOG ALARMThis is a watchdog timer aalrm or a servo system alarm for axis 1 to 4.
921SUB CPU WATCH DOG ALARMThis is a watchdog timer alarm related to the sub-CPU board or a servo system alarm for axis 5 or 6.
9227/8 AXIS SERVO SYSYTEM ALARMThis is a servo system alarm related to axis 7 or 8.
930CPU ERRORReplace the master PC board.
940PC BOARD INSTALLATION ERRORPC board installation is incorrect. Check the specification of the PC board.
941MEMORY PC BOARD CONNECTION ERRORThe memory PC board is not connected securely.
945SERIAL SPINDLE COMMUNICATION ERRORThe hardware configuration is incorrect for the serial spindle, or a communication alarm occured.
946SECOND SERIAL SPINDLE COMMUNICATION ERRORCommunication is impossible with the second serial spindle.
950FUSE BLOWN ALARMA fuse has blown.
960SUB CPU ERRORThis is a sub-CPU error.
998ROM PARITYThis is a ROM parity error.

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The aforementioned alarm codes pertain to the FANUC Series 0, such as A06B-6058, A06B-6057 units. Knowing your error code could help us provide you with the fast and precise evaluation for repair or exchange services.