
APPENDIX
B–63445EN/01
A. ALARM LIST
187
5) Over travel alarms
If this alarm occurs, move the machine manually in the direction opposite to that in which it was moving when
the alarm occurred, then reset the alarm.
Number Message Contents
500 OVER TRAVEL : +n Exceeded the n–th axis (axis 1–2) + side stored stroke limit I.
(Parameter No.1320)
501 OVER TRAVEL : –n Exceeded the n–th axis (axis 1–2) – side stored stroke limit I.
(Parameter No.1321)
506 OVER TRAVEL : +n Exceeded the hard OT of the n–th axis + side.
507 OVER TRAVEL : –n Exceeded the hard OT of the n–th axis – side.
6) Overheat alarms
Number Message Contents
700 OVERHEAT: CONTROL UNIT Control unit overheat
Check that the fan motor operates normally, and clean the air filter.
701 OVERHEAT: FAN MOTOR The fan motor on the top of the control unit is abnormal. Check the
operation of the fan motor. If the fan motor has stopped, replace the
fan or power supply PCB.
7) System alarms
(These alarms cannot be reset with reset key.)
Number Message Contents
900 ROM PARITY ROM parity error
Replace the ROM.
910 SRAM PARITY: (LOW) RAM parity error. Clear the memory or replace the base PCB.
After this operation, reset all data including the parameters.
911 SRAM PARITY : (HIGH) RAM parity error. Clear the memory or replace the base PCB.
After this operation, reset all data including the parameters.
920 SERVO ALARM (1/2 AXIS) Servo alarm (1st or 2nd axis). A watchdog alarm or a local RAM par-
ity error of the servo occured.
Replace the base PCB.
930 CPU INTERRUPUT CPU error (abnormal interrupt)
The base PCB is faulty.
950 PMC SYSTEM ALARM Fault occurred in the PMC. The base PCB or PMC module may be
faulty.
973 NON MASK INTERRUPT NMI occurred for an unknown reason. Or, a communication error oc-
curred in the FANUC I/O link slave function.
8) MEMORY CARD ALARM
Number Message Contents and solution
5101 MEMORY CARD NOT
CONNECTED
No memory card is inserted.
Insert a memory card before attempting input/output.
5102 MEMORY CARD WRITE
PROTECTED
The memory card is write–protected.
Write–enable the memory card before attempting to write data to it.
5103 MEMORY CARD DATA ERROR (During restoration) The memory card contains invalid data.
(During saving) Data cannot be written to the memory card.
The memory card may be defective.
Use another memory card.
5104 EMERGENCY STOP RELEASE The emergency stop state was released during input/output to or
from the memory card. Place the system in emergency stop state,
then retry input/output.
5105 LADDER READ ERROR An alarm was issued during the input of ladder programs from the
memory card. Reinput the ladder programs.