APPENDIX
B–63834EN/02
G. ALARM LIST
777
Number ContentsMessage
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.