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FANUC Alarm ARC-031 — STOPL No motion while welding (%s^4,%d^5)

FANUC ARC-031 (“STOPL No motion while welding (%s^4,%d^5)”): Motion has stopped longer than $arc_los_tim while welding. First check: If no motion is needed during welding, increase the arc loss time in the Weld Equipment SETUP screen or disable arc loss detection in the Weld System SETUP screen.

Updated 2026-08-29 · LogrobotLM reference

Description

Motion has stopped longer than $arc_los_tim while welding.

Remedy · Remède

If no motion is needed during welding, increase the arc loss time in the Weld Equipment SETUP screen or disable arc loss detection in the Weld System SETUP screen.

Frequently asked · Questions fréquentes

What does FANUC alarm ARC-031 mean?
FANUC ARC-031 (“STOPL No motion while welding (%s^4,%d^5)”): Motion has stopped longer than $arc_los_tim while welding.
How do you troubleshoot FANUC alarm ARC-031?
If no motion is needed during welding, increase the arc loss time in the Weld Equipment SETUP screen or disable arc loss detection in the Weld System SETUP screen.

Related codes / Codes liés

ARC-029STOPL Wire Feed AO is not scaled (%s ^ 4 , %d^5)ARC-030WARN Wire stick is still detected (%s^4,%d^5)ARC-032STOPL Weld stopped by single step (%s^4,%d^5)ARC-033STOPL Override must be 100%% to weld (%s^4,%d^5)

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 →