A bus error occurred on the local bus on the motherboard.
This alarm indicates that an error occurred during the exchange of data
within the motherboard.
Replace the CPU card on the motherboard (main CPU board).
Replace the display control card, axis control cards, and FROM/SRAM
module, one at a time.
Replace the motherboard.
If alarm 972 is issued, indicating on the screen that a local BUS error
occurred on an option board, replace the CPU card on the option card,
DRAM module, axis control cards, and option card, one at a time.
Some option boards have a circuit equivalent to the CPU card installed
on the boards themselves. See the hardware chapter for details.
Screen display example
SYSTEM ALARM
972 NMI OCCURRED IN OTHER MODULE
SLOT 01
976 LĆBUS ERROR <SUB
11.39
ALARM 976
(LOCAL BUS ERROR)
Causes and actions
D Replacing the CPU card
D Replacing other cards
and modules
D Replacing the
motherboard
D Local BUS error on an
option board
GFKE-0222-EN
11.TROUBLESHOOTING
825