LogrobotLM

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FANUC Alarm HOST-303 — Not supported CNC

FANUC HOST-303 (“Not supported CNC”): The CNC is not suported. First check: Change the CNC to a supported type.

Updated 2026-08-29 · LogrobotLM reference

Description

The CNC is not suported.

Remedy · Remède

Change the CNC to a supported type.

Frequently asked · Questions fréquentes

What does FANUC alarm HOST-303 mean?
FANUC HOST-303 (“Not supported CNC”): The CNC is not suported.
How do you troubleshoot FANUC alarm HOST-303?
Change the CNC to a supported type.

Related codes / Codes liés

HOST-301Not Connected(Tag=%s)HOST-302CNC doesn't ConnectedHOST-304Cycle power to change CNC No.HOST-305Start Comm. with CNC No.%d

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 →