Fanuc alarm 196: PMC WATCH DOG ALARM
30i/31i/32i system alarm · Fanuc 30i/31i/32i-B
What it means
The watchdog timer for the PMC processor expired, meaning the PMC system software stopped executing. Because the PMC shares the main board CPU resources on 30i-series controls, this normally indicates a hardware problem rather than a ladder bug. Fanuc's stated remedy is replacement of the main board.
Likely causes
- Main board (CPU/PMC ASIC) failure
- Corrupted PMC system files after a failed load
- Momentary power interruption during PMC boot
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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Main board (see third line of alarm screen for PCB designation)
board · Common cause
Need the part urgently?
Send us alarm 196 with your machine details — typical RFQ turnaround is 24–48h.