Fanuc Power Mate i-D/H Maintenance Manual

7. TROUBLESHOOTING
B63175EN/03
456
A bus error occurred on the FANUCBUS connecting each option board.
This alarm indicates that a fault occurred during the exchange of data
between the base printedcircuit board and an option board.
This alarm is also issued if an error occurs during the exchange of data
between the base printedcircuit board and the PMC control circuit.
Replace the installed option boards, one at a time.
Replace the back panel.
Replace the CPU card on the base printedcircuit board.
Replace the base printedcircuit board.
If alarm 972 is issued, indicating on the screen that an FBUS error
occurred on an option board, replace the option board on which the
FBUS error occurred.
Screen display example
SYSTEM ALARM
972 NMI OCCURRED IN OTHER MODULE
SLOT 01
974 FĆBUS ERROR <SUB
7.32
ALARM 974
(FBUS ERROR)
Causes and actions
D Replacing the option
boards
D Replacing the back panel
D Replacing the CPU card
D Replacing the base
printedcircuit board
D FBUS error on an
option board

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