LogrobotLM

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FANUC Alarm PRIO-121 — WARN Stop PMC program

FANUC PRIO-121 (“WARN Stop PMC program”): You can not do this operation when PMC peogram is running. First check: Please stop PMC program execution.

Updated 2026-09-17 · LogrobotLM reference

Description

You can not do this operation when PMC peogram is running.

Remedy

Please stop PMC program execution.

Related codes

PRIO-106STOP Device with port is off-linePRIO-119WARN Too many DIGITAL I/O portsPRIO-125SYST SLC2 initialization errorPRIO-126WARN No PMC program

Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →