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FANUC Alarm ARC-021 — ABORT Program aborted while welding

Manufacturer wording — ABORT Program aborted while welding (%s^4,%d^5)
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC ARC-021 (“ABORT Program aborted while welding”): A program was aborted while welding. First check: Check if weld controler is functioning correctly, or powered on.

Updated 2026-09-17 · LogrobotLM reference

Description

A program was aborted while welding.

Remedy

Check if weld controler is functioning correctly, or powered on.

Related codes

ARC-019STOPL Can't read arc detect inputARC-020STOPL No plan data area availableARC-022WARN Weld AO scaling limit usedARC-023STOPL Illegal arc schedule type

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 →