LogrobotLM

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FANUC Alarm APSH-021 — WARN Raise UOP ENBL input

FANUC APSH-021 (“WARN Raise UOP ENBL input”): Robot motion and/or program execution cannot occur unless UOP input 8 is ON. First check: Check UOP I/O setup.

Updated 2026-08-29 · LogrobotLM reference

Description

Robot motion and/or program execution cannot occur unless UOP input 8 is ON.

Remedy · Remède

Check UOP I/O setup. UOP input 8 (ENBL) must be ON.

Frequently asked · Questions fréquentes

What does FANUC alarm APSH-021 mean?
FANUC APSH-021 (“WARN Raise UOP ENBL input”): Robot motion and/or program execution cannot occur unless UOP input 8 is ON.
How do you troubleshoot FANUC alarm APSH-021?
Check UOP I/O setup. UOP input 8 (ENBL) must be ON.

Related codes / Codes liés

APSH-019WARN Job queue is fullAPSH-020WARN Job queue is emptyAPSH-022WARN Safety fence is openAPSH-024WARN Program %s not loaded

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. · Informations indicatives issues du terrain — le manuel du constructeur et ses procédures de sécurité font foi. Ne shuntez jamais un organe de sécurité ; consignez (LOTO) avant toute intervention physique. How this reference is built →