LogrobotLM

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FANUC Alarm HOST-141 — WARN Protocol Start/Stop error

FANUC HOST-141 (“WARN Protocol Start/Stop error”): The Host Comm Protocol could not be started (Mounted) or stopped (dismounted) on the First check: Either use another Comm Tag or Stop and Undefine the selected Comm Tag under Menus-Setup-HostComm-Show

Updated 2026-09-17 · LogrobotLM reference

Description

The Host Comm Protocol could not be started (Mounted) or stopped (dismounted) on the

Remedy

Either use another Comm Tag or Stop and Undefine the selected Comm Tag under Menus-Setup-HostComm-Show

Related codes

HOST-139WARN Invalid functionHOST-140WARN Device offlineHOST-142WARN Connection errorHOST-143WARN Comm port cannot be closed

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 →