An unknown NMI has generated.
This alarm may also be issued when the FANUC I/O link is disconnected
while the Power Mate is being used as the slave of the I/O link.
1) Base PC board or CPU board is faulty
D Base PC board is faulty.
D CPU card is faulty.
2) The power to those units connected to the I/O link is turned off, or a
system alarm is issued.
Turn the power off, then back on again. This clears the alarm.
When the base printed–circuit board is replaced, all data in
the memory will be lost because the memory module is
dismounted. Re–set up the data by referring to Chapter 3.
With the basic function version 03 and later versions, if the
alarm is due to the I/O Link, alarm 977 is indicated.
(NMI ALARM BY
Causes and Remedies