LogrobotLM

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FANUC Alarm HOST-100 — WARN Communications error

FANUC HOST-100 (“WARN Communications error”): The protocol format was invalid. First check: Verify protocol field in the setup menu and retry the operation.

Updated 2026-08-29 · LogrobotLM reference

Description

The protocol format was invalid.

Remedy · Remède

Verify protocol field in the setup menu and retry the operation.

Frequently asked · Questions fréquentes

What does FANUC alarm HOST-100 mean?
FANUC HOST-100 (“WARN Communications error”): The protocol format was invalid.
How do you troubleshoot FANUC alarm HOST-100?
Verify protocol field in the setup menu and retry the operation.

Related codes / Codes liés

HOST-006WARN End of file reachedHOST-008WARN Only one file may be openedHOST-101WARN Directory read errorHOST-102WARN Block check 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 →