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FANUC Alarm IBSS-488 — Master is not running

FANUC IBSS-488 (“Master is not running”): System internal error First check: Document the events that led to the error, and call your FANUC or FANUC Robotics technical service representative.

Updated 2026-08-29 · LogrobotLM reference

Description

System internal error

Remedy · Remède

Document the events that led to the error, and call your FANUC or FANUC Robotics technical service representative.

Frequently asked · Questions fréquentes

What does FANUC alarm IBSS-488 mean?
FANUC IBSS-488 (“Master is not running”): System internal error
How do you troubleshoot FANUC alarm IBSS-488?
Document the events that led to the error, and call your FANUC or FANUC Robotics technical service representative.

Related codes / Codes liés

IBSS-486Power OFF/ON is necessaryIBSS-487Trying to reset Bus FaultIBSS-489Update Dev. Name by Load Conf.IBSS-490Parameterization by SVC failed

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 →