LogrobotLM

LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free → · Le diagnostic IA qui lit la sauvegarde de votre robot, sans rien téléverser.

FANUC Alarm BELL-120 — WARN I/O Hardware not installed

FANUC BELL-120 (“WARN I/O Hardware not installed”): I/O Hardware selected is physically not installed First check: Make sure I/O Hardware that is being selected is installed correctly!

Updated 2026-08-29 · LogrobotLM reference

Description

I/O Hardware selected is physically not installed

Remedy · Remède

Make sure I/O Hardware that is being selected is installed correctly!

Frequently asked · Questions fréquentes

What does FANUC alarm BELL-120 mean?
FANUC BELL-120 (“WARN I/O Hardware not installed”): I/O Hardware selected is physically not installed
How do you troubleshoot FANUC alarm BELL-120?
Make sure I/O Hardware that is being selected is installed correctly!

Related codes / Codes liés

BELL-111WARN Press shift-reset & hold shiftBELL-112WARN Minimum %s positions to processBELL-121WARN Host name not recognized

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 →