FANUC Alarm SYST-139 — WARN Invalid motherboard request

FANUC SYST-139 (“WARN Invalid motherboard request”): The specified motherboard index is not a valid value. First check: This is a programming error.

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 →