FANUC Alarm LANG-004 — WARN File is not open
FANUC LANG-004 (“WARN File is not open”): (1) The wrong port is set to the port you want to use. First check: (1) Set the currect port.
Updated 2026-09-17 · LogrobotLM reference
Description
(1) The wrong port is set to the port you want to use. (2) The device may be out of order.
Remedy
(1) Set the currect port. (2) Check the device if it works fine.
Related codes
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 →