Fanuc alarm 57: Excessive deceleration power in PSM (mirrored)
αi SPM · Fanuc αi SPM
What it means
When shown on the αi SPM status display, code 57 reflects a regenerative/deceleration-power alarm raised in the common PSM. Interpret the code against the PSM's own display rather than the spindle module.
Likely causes
- Regenerative capacity of PSM insufficient for duty cycle
- Excessive deceleration frequency from high-inertia loads
- PSM regenerative circuit failure
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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A06B-6110-Hxxx / A06B-6120-Hxxx (PSM)
power-supply · Common cause
Need the part urgently?
Send us alarm 57 with your machine details — typical RFQ turnaround is 24–48h.