LogrobotLM

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FANUC Alarm HOST-300 — Can't connect to CNC(%s)

FANUC HOST-300 (“Can't connect to CNC(%s)”): Robot cannot connect to CNC. First check: Check the communication setup.

Updated 2026-08-29 · LogrobotLM reference

Description

Robot cannot connect to CNC.

Remedy · Remède

Check the communication setup.

Frequently asked · Questions fréquentes

What does FANUC alarm HOST-300 mean?
FANUC HOST-300 (“Can't connect to CNC(%s)”): Robot cannot connect to CNC.
How do you troubleshoot FANUC alarm HOST-300?
Check the communication setup.

Related codes / Codes liés

HOST-289SMB: DOS error: Requested share does not existHOST-299SMB: DOS Error %d from PCHOST-301Not Connected(Tag=%s)HOST-302CNC doesn't Connected

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 →