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FANUC Alarm ARC-031 — STOPL No motion while welding

Manufacturer wording — STOPL No motion while welding (%s^4,%d^5)
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC ARC-031 (“STOPL No motion while welding”): 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 2026-09-17 · LogrobotLM reference

Description

Motion has stopped longer than $arc_los_tim while welding.

Remedy

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

ARC-029STOPL Wire Feed AO is not scaledARC-030WARN Wire stick is still detectedARC-032STOPL Weld stopped by single stepARC-033STOPL Override must be 100% to weld

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 →