FANUC Alarm ARC-019 — STOPL Can't read arc detect input

Manufacturer wording — STOPL Can't read arc detect input (%s^4,%d^5)
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC ARC-019 (“STOPL Can't read arc detect input”): The arc detect input could not be read. First check: Check if weld controler is functioning correctly, or powered on.

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 →