
APPENDIX
B–64134EN/01
G. ALARM LIST
773
12) System alarms
(These alarms cannot be reset with reset key.)
Number Message Contents
900 ROM PARITY ROM parity error (CNC/OMM/Servo)
Replace the number of ROM.
910 SRAM PARITY : (BYTE 0)
RAM parity error in the tape memory RAM module. Clear the memory
or replace the module.
911 SRAM PARITY: (BYTE 1)
After this operation, reset all data including the parameters.
912 DRAM PARITY : (BYTE 0)
RAM parity error in the DRAM module. Replace the DRAM module.
913 DRAM PARITY : (BYTE 1)
914 DRAM PARITY : (BYTE 2)
915 DRAM PARITY : (BYTE 3)
916 DRAM PARITY : (BYTE 4)
917 DRAM PARITY : (BYTE 5)
918 DRAM PARITY : (BYTE 6)
919 DRAM PARITY : (BYTE 7)
920 SERVO ALARM (1 to 4 AXIS) Servo alarm (1st to 4th axis). A watchdog alarm or a RAM parity error
in the servo module occurred.
Replace the servo control module on the main CPU board.
926 FSSB ALARM FSSB alarm. Replace the servo control module on the main CPU board.
930 CPU INTERRUPUT CPU error (abnormal interrupt)
The main CPU board is faulty.
935 SRAM ECC ERROR An error occurred in RAM for part program storage.
Action:
Replace the master printed circuit board (SRAM module), perform all–
clear operation, and set all parameter and other data again.
950 PMC SYSTEM ALARM Fault occurred in the PMC. The PMC control module on the main CPU
board or option board may be faulty.
951 PMC–RC WATCH DOG ALARM Fault occurred in the PMC–RC (watchdog alarm).Option board may be
faulty.
970 NMI OCCURRED IN PMCLSI With the PMC–SA1, an error occurred in the PMC control LSI device
on the motherboard. (I/O RAM parity)
Replace the motherboard.
971 NMI OCCURRED IN SLC With the PMC–SA1, an I/O Link disconnection was detected.
Check the I/O Link.
972 NMI OCCURRED IN OTHER MOD-
ULE
NMI occurred in a board other than the main CPU board.
973 NON MASK INTERRUPT NMI occurred for an unknown reason.
974 F–BUS ERROR BUS error of FANUC BUS.
The main CPU board or option boards may be faulty.
975 BUS ERROR (MAIN) Main CPU board bus error.
The main CPU board may be faulty.
976 L–BUS ERROR Bus error of Local Bus.
The main CPU board may be faulty.