
APPENDIX
B–63194EN/02
G. ALARM LIST
773
9) System alarms
(These alarms cannot be reset with reset key.)
Number Message Contents
900 ROM PARITY A parity error occurred in the CNC, macro, or servo ROM. Correct
the contents of the flash ROM having the displayed number.
910 SRAM PARITY : (BYTE 0) A RAM parity error occurred in the part program storage RAM. Clear
911 SRAM PARITY : (BYTE 1)
the RAM, or replace the SRAM module or motherboard. Subse-
quently, re–set the parameters and all other data.
912 DRAM PARITY : (BYTE 0) A RAM parity error occurred in the DRAM module. Replace the
913 DRAM PARITY : (BYTE 1)
DRAM module.
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 (1–4 AXIS) Servo alarm (first to fourth axis). A watchdog alarm condition oc-
curred, or a RAM parity error occurred in the axis control card.
Replace the axis control card.
921 SERVO ALARM (5–8 AXIS) Servo alarm (fifth to eighth axis). A watchdog alarm condition oc-
curred, or a RAM parity error occurred in the axis control card.
Replace the axis control card.
926 FSSB ALARM FSSB alarm.
Replace the axis control card.
930 CPU INTERRUPT CPU error (abnormal interrupt).
The motherboard or CPU card may be faulty.
950 PMC SYSTEM ALARM An error occurred in the PMC.
The PMC control circuit on the motherboard may be faulty.
951 PMC WATCH DOG ALARM An error occurred in the PMC.
(Watchdog alarm)
The motherboard may be faulty.
972 NMI OCCURRED IN OTHER MOD-
ULE
An NMI occurred on a board other than the motherboard.
The option board may be faulty.
973 NON MASK INTERRUPT An NMI occurred as a result of an unknown cause.
974 F–BUS ERROR A bus error occurred on the FANUC bus.
The motherboard or option board may be faulty.
975 BUS ERROR A bus error occurred on the motherboard.
The motherboard may be faulty.
976 L–BUS ERROR A bus error occurred on the local bus.
The motherboard may be faulty.