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Fanuc 16i/18i/21i CNC

Fanuc 16i/18i/21i CNC Error Codes

Complete alarm and error code reference for the Fanuc 16i/18i/21i CNC. Browse all 360 documented fault codes below, each linking to a detailed troubleshooting guide.

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Complete Alarm List (Page 1 of 2)

PLEASE TURN OFF POWER

TH PARITY ALARM

TV PARITY ALARM

TOO MANY DIGITS

ADDRESS NOT FOUND

NO DATA AFTER ADDRESS

ILLEGAL USE OF NEGATIVE SIGN

ILLEGAL USE OF DECIMAL POINT

ILLEGAL ADDRESS INPUT

IMPROPER G–CODE

NO FEEDRATE COMMANDED

CAN NOT COMMAND G95

TOO MANY AXES COMMANDED

OVER TOLERANCE OF RADIUS

ILLEGAL PLANE AXIS COMMANDED

NO CIRCULAR RADIUS

CANNOT COMMAND F0 IN G02/G03

NO AXES COMMANDED IN G43/G44

ILLEGAL PLANE SELECT

ILLEGAL OFFSET VALUE

ILLEGAL OFFSET NUMBER

ILLEGAL P COMMAND IN G10

ILLEGAL OFFSET VALUE IN G10

NO SOLUTION AT CRC

NO CIRC ALLOWED IN ST–UP /EXT BLK

CAN NOT COMMANDED G31

CAN NOT CHANGE PLANE IN CRC

INTERFERENCE IN CIRCULAR BLOCK

INTERFERENCE IN CRC

G45/G48 NOT ALLOWED IN CRC

G27–G30 NOT ALLOWED IN FIXED CYC

NO G COMMAND (G73/G83)

ILLEGAL REFERENCE RETURN COMMAND

CHF/CNR NOT ALLOWED IN THRD BLK

MISSING MOVE AFTER CHF/CNR

CODE IS NOT G01 AFTER CHF/ CNR

TOO MANY ADDRESS COMMANDS

MISSING MOVE VALUE IN CHF/ CNR

END POINT NOT FOUND

PROGRAM NUMBER NOT FOUND

SEQUENCE NUMBER NOT FOUND

NO PROGRAM SPACE IN MEMORY

TOO MANY PROGRAMS

PROGRAM NUMBER ALREADY IN USE

ILLEGAL PROGRAM NUMBER

ADDRESS P NOT DEFINED

SUB PROGRAM NESTING ERROR

NUMBER NOT FOUND

PROGRAM VERIFY ERROR

G37 ARRIVAL SIGNAL NOT ASSERTED

OFFSET NUMBER NOT FOUND IN G37

H–CODE NOT ALLOWED IN G37

ILLEGAL AXIS COMMAND IN G37

COMMUNICATION ERROR

BUFFER OVERFLOW

REFERENCE RETURN INCOMPLETE

REFERENCE RETURN INCOMPLETE

AXES NOT ON THE REFERENCE POINT

P TYPE NOT ALLOWED (COORD CHG)

P TYPE NOT ALLOWED (EXT OFS CHG)

P TYPE NOT ALLOWED (WRK OFS CHG)

P TYPE NOT ALLOWED (AUTO EXEC)

G28 FOUND IN SEQUENCE RETURN

MDI EXEC NOT ALLOWED AFT. SEARCH

PARAMETER WRITE ENABLE

PLEASE CLEAR MEMORY

FORMAT ERROR IN G08

CALCULATED DATA OVERFLOW

DIVIDED BY ZERO

IMPROPER COMMAND

FORMAT ERROR IN MACRO

ILLEGAL VARIABLE NUMBER

WRITE PROTECTED VARIABLE

PARENTHESIS NESTING ERROR

ILLEGAL ARGUMENT

QUADRUPLICATE MACRO MODAL–CALL

CAN NOT USE MACRO COMMAND IN DNC

MISSING END STATEMENT

FORMAT ERROR IN MACRO

ILLEGAL LOOP NUMBER

NC, MACRO STATEMENT IN SAME BLOCK

ILLEGAL MACRO SEQUENCE NUMBER

ILLEGAL ARGUMENT ADDRESS

ILLEGAL AXIS OPERATION

TOO MANY EXTERNAL ALARM MESSAGES

ALARM NUMBER NOT FOUND

ILLEGAL DATA IN EXT. ALARM MSG

ILLEGAL ANGLE COMMAND

ILLEGAL AXIS COMMAND

CAN NOT CHANGE PMC CONTROL AXIS

CAN NOT COMMAND G51 IN CRC

ILLEGAL SCALE RATE

SCALED MOTION DATA OVERFLOW

ILLEGAL PLANE SELECTED

ILLEGAL SETTING DATA

FORMAT ERROR IN G10L3

ILLEGAL TOOL GROUP NUMBER

TOOL GROUP NUMBER NOT FOUND

NO SPACE FOR TOOL ENTRY

T–CODE NOT FOUND

NOT USING TOOL IN LIFE GROUP

ILLEGAL T–CODE IN M06

P/L COMMAND NOT FOUND

TOO MANY TOOL GROUPS

ILLEGAL TOOL LIFE DATA

TOOL DATA SETTING INCOMPLETE

IMPROPER G–CODE IN G107

CHECK SUM ERROR (G05 MODE)

G05 COMMANDED IN G41/G42 MODE

PARAM. (PRM NO. 7510) SETTING ERROR

COMMUNICATION ERROR (REMOTE BUF)

ILLEGAL AXIS SELECT

SPINDLE COMMAND IN SYNCHRO–MODE

C–AXIS COMMANDED IN SPINDLE MODE

MACRO WORD UNDEFINED

ILLEGAL S CODE COMMAND

FEEDRATE NOT FOUND IN RIGID TAP

POSITION LSI OVERFLOW

PROGRAM MISS AT RIGID TAPPING

ILLEGAL AXIS OPERATION

RIGID MODE DI SIGNAL OFF

CAN NOT CHANGE PLANE (RIGID TAP)

RIGID DATA MISMATCH

CAN NOT COMAND M198/M99

ILLEGAL PLANE SELECT

ILLEGAL COMMAND IN SYNCHRO–MODE

ILLEGAL COMMAND IN SYNCHRO–MODE

RETURN TO REFERENCE POINT

ILLEGAL FORMAT IN G10 OR L50

TOO MANY HELICAL AXIS COMMANDS

G05 IS NOT AVAIRABLE

PARAMETER OF RESTART ERROR

ILLEGAL PARAMETER (ST.COMP)

NO DECIMAL POINT

ADDRESS DUPLICATION ERROR

IMPROPER G–CODE (G05.1 Q1 MODE)

IMPROPER MODAL G–CODE (G05.1 Q1)

G08 CAN NOT BE COMMANDED (G05.1 Q1)

NOT STOP POSITION (G05.1 Q1)

FSSB: OPEN READY TIME OUT

FSSB: ERROR MODE

FSSB: NUMBER OF AMPS IS SMALL

FSSB: CONFIGURATION ERROR

FSSB: AXIS SETTING NOT COMPLETE

ILLEGAL AXIS OPERATION (AICC)

PARAMETER ZERO (AICC)

FSSB: OPEN TIME OUT

FSSB: ID DATA NOT READ

REFERENCE POINT ADJUSTMENT MODE

SRAM CORRECTABLE ERROR

WRITE PROTECTED

DATA OVER–FLOW

COMMUNICATION ERROR

G41/G42 NOT ALLOWED IN MDI MODE

TOUCH PANEL ERROR

MODE CHANGE ERROR

FSSB: ILLEGAL CONNECTION

nth–axis origin return

APC alarm: nth–axis communication

APC alarm: nth–axis over time

APC alarm: nth–axis framing

APC alarm: nth–axis parity

APC alarm: nth–axis pulse error

APC alarm: nth–axis battery voltage 0

APC alarm: nth–axis battery low 1

APC alarm: nth–axis battery low 2

APC ALARM: n AXIS ZRN IMPOSSIBL

n AXIS: ABNORMAL CHECKSUM (INT)

n AXIS: ABNORMAL PHASE DATA (INT)

n AXIS: ABNORMAL REV.DATA (INT)

n AXIS: ABNORMAL CLOCK (INT)

n AXIS: SOFT PHASE ALARM (INT)

n AXIS: BROKEN LED (INT)

n AXIS: PULSE MISS (INT)

n AXIS: COUNT MISS (INT)

n AXIS: SERIAL DATA ERROR (INT)

n AXIS: DATA TRANS. ERROR (INT)

n AXIS: BROKEN LED (EXT)

n AXIS: ABNORMAL PHASE (EXT LIN)

n AXIS: COUNT MISS (EXT)

n AXIS: PULSE MISS (EXT)

n AXIS: SOFT PHASE ALARM (EXT)

n AXIS: SERIAL DATA ERROR (EXT)

n AXIS: DATA TRANS. ERROR (EXT)

n AXIS: ABNORMAL ENCODER (EXT)

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