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FANUC Alarm HOST-142 — WARN Connection error

FANUC HOST-142 (“WARN Connection error”): The Host Comm Protocol could not establish communication with the remote device. First check: Ensure both local and remote are using compatible software versions.

Updated 2026-08-29 · LogrobotLM reference

Description

The Host Comm Protocol could not establish communication with the remote device. Possible software mismatch.

Remedy · Remède

Ensure both local and remote are using compatible software versions.

Frequently asked · Questions fréquentes

What does FANUC alarm HOST-142 mean?
FANUC HOST-142 (“WARN Connection error”): The Host Comm Protocol could not establish communication with the remote device. Possible software mismatch.
How do you troubleshoot FANUC alarm HOST-142?
Ensure both local and remote are using compatible software versions.

Related codes / Codes liés

HOST-140WARN Device offlineHOST-141WARN Protocol Start/Stop errorHOST-143WARN Comm port cannot be closedHOST-144WARN Comm Tag error

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. · Informations indicatives issues du terrain — le manuel du constructeur et ses procédures de sécurité font foi. Ne shuntez jamais un organe de sécurité ; consignez (LOTO) avant toute intervention physique. How this reference is built →