FANUC Alarm HOST-139 — WARN Invalid function

FANUC HOST-139 (“WARN Invalid function”): The Host Comm Protocol does not support the requested function. First check: Check the Host Comm Protocol to ensure the function is supported.

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 →