FANUC Alarm HOST-143 — WARN Comm port cannot be closed
FANUC HOST-143 (“WARN Comm port cannot be closed”): The selected hardware port defined for the Comm Tag could not be closed. First check: Power the controller OFF and then ON and try again.
Updated 2026-08-29 · LogrobotLM reference
Description
The selected hardware port defined for the Comm Tag could not be closed.
Remedy · Remède
Power the controller OFF and then ON and try again. If the error occurs again a cabling or hardware problem might exist with the port.
Frequently asked · Questions fréquentes
- What does FANUC alarm HOST-143 mean?
- FANUC HOST-143 (“WARN Comm port cannot be closed”): The selected hardware port defined for the Comm Tag could not be closed.
- How do you troubleshoot FANUC alarm HOST-143?
- Power the controller OFF and then ON and try again. If the error occurs again a cabling or hardware problem might exist with the port.
Related codes / Codes liés
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 →