LogrobotLM

LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free → · Le diagnostic IA qui lit la sauvegarde de votre robot, sans rien téléverser.

FANUC Alarm MOTN-391 — Motion option cfg file missing

FANUC MOTN-391 (“Motion option cfg file missing”): Motion option configuration file is not loaded or cannot be read. First check: Re-load correct motion option config file.

Updated 2026-08-29 · LogrobotLM reference

Description

Motion option configuration file is not loaded or cannot be read.

Remedy · Remède

Re-load correct motion option config file.

Frequently asked · Questions fréquentes

What does FANUC alarm MOTN-391 mean?
FANUC MOTN-391 (“Motion option cfg file missing”): Motion option configuration file is not loaded or cannot be read.
How do you troubleshoot FANUC alarm MOTN-391?
Re-load correct motion option config file.

Related codes / Codes liés

MOTN-381Hand-Runner too closeMOTN-390%s is required for %sMOTN-392Too many softpartsMOTN-400STOP No Coll. Guard Reg. Defined

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 →