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 2026-09-17 · LogrobotLM reference

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 →