FANUC Series 16/18/160/180-Model C Machining Center Operators Manual

APPENDIX
G. ALARM LIST
B–62764EN/01
900
10) System alarms
(These alarms cannot be reset with reset key.)
Number Message Contents
900 ROM PARITY ROM parity error (CNC/OMM/Servo)
Rewrite the flash ROM with the indicated ROM number.
910 RAM PARITY : (4N) RAM parity error in the tape memory RAM module. Clear the memory
or replace the module.
After this operation, reset all data including the parameters.
911 RAM PARITY: (4N+1) RAM parity error in the tape memory RAM module. Clear the memory
or replace the module.
After this operation, reset all data including the parameters.
912 RAM PARITY: (4N+2) RAM parity error in the tape memory RAM module. Clear the memory
or replace the module.
After this operation, reset all data including the parameters.
913 RAM PARITY : (4N+3) RAM parity error in the tape memory RAM module. Clear the memory
or replace the module.
After this operation, reset all data including the parameters.
914 ADDITIONAL SRAM PARITY (2N)
RAM parity error for part program storage RAM or additional SRAM.
Clear memory or re
p
lace the main CPU board or additional SRAM.
915 ADDITIONAL SRAM PARITY (2N+1)
Clear
memory
or
re lace
the
main
CPU
board
or
additional
SRAM
.
Then, re–specify all data including parameters.
916 DRAM PARITY RAM parity error in the DRAM module. Replace the DRAM module.
920 SERVO ALARM (1/2 AXIS) Servo alarm (1st or 2nd axis). A watchdog alarm or a RAM parity error
in the servo module occurred.
Replace the servo control module on the main CPU board.
921 SERVO ALARM (3/4 AXIS) Servo alarm (3rd or 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.
922 SERVO ALARM (5/6 AXIS) Servo alarm (5th to 8th axis). A watchdog alarm or a RAM parity error
in the servo module occurred.
Replace the servo control module on the option 2 board.
926 SERVO ALARM (1/2/3/4/5/6 AXIS) Servo alarm (first to sixth axis). A RAM parity error in the servo module
or a watchdog alarm has occurred. Replace the servo control module
on the main CPU board.
930 CPU INTERRUPUT CPU error (abnormal interrupt)
The main CPU board is faulty.
950 PMC SYSTEM ALARM Fault occurred in the PMC. The PMC control module on the main CPU
board or option 3 board may be faulty.
951 PMC–RC WATCH DOG ALARM Fault occurred in the PMC–RC (watchdog alarm).Option 3 board may
be faulty.
970 NMI OCCURRED IN BOC RAM parity error or NMI occurred in the PMC–RB or PMC–RA2 module.
971 NMI OCCURRED IN SLC An alarm condition occurred in the interface with an I/O unit. For PMC–
RA and PMC–RB, check that the PMC control module on the main CPU
board is conneted to the I/O unit securely. For PMC–RC, check that the
PMC control module on the option 3 board is connected to the I/O unit
is supplied with power and that the interface module is intact.
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 1 to 3 boards may be faulty.
975 BUS ERROR (MAIN) Main CPU board bus error.
The main CPU board may be faulty.

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