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FANUC Alarm ARC-046 — WARN Weld EQ communication error

FANUC ARC-046 (“WARN Weld EQ communication error”): There was a communication error detected between ArcTool and the Weld Equipment. First check: Verify the Weld Equipment is ON.

Updated 2026-09-17 · LogrobotLM reference

Description

There was a communication error detected between ArcTool and the Weld Equipment.

Remedy

Verify the Weld Equipment is ON. Verify the DeviceNet cable is connected. Check the DeviceNet I/O screen board status and device status.

Related codes

ARC-044STOPL Weld EQ needs DeviceNet defn.ARC-045WARN Weld EQ Device is OFFLINEARC-047WARN Not allowed during a weldARC-048WARN Auto AI/O setup is unsupported

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 →