
B–62835EN/01
8.TROUBLESHOOTING
333
An unknown NMI has generated.
This alarm may also occur due to an I/O Link communication error when
the Power Mate is used as a slave of the FANUC I/O Link.
Possible causes are as follows. Replace the corresponding printed circuit
board.
D Defective base printed–circuit board
D Defective memory
See the description of alarms 910 to 911 for details of the memory
location.
D Defective CPU module (Power Mate–D/B001, B520)
See alarm 930 for the location of the CPU module.
D Defective power supply printed–circuit board
NOTE
If the base printed–circuit board is replaced, or if the
memory module is removed then remounted, all data in
memory will be lost. Re–set the data as explained in
Chapter 3.
8.37
ALARM 973
(NMI ALARM BY
UNKNOWN CAUSE)
Causes and Remedies