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FANUC Alarm IBSS-487 — Trying to reset Bus Fault

FANUC IBSS-487 (“Trying to reset Bus Fault”): System internal error First check: Document the events that led to the error, and call your FANUC or FANUC Robotics technical service representative.

Updated 2026-09-17 · LogrobotLM reference

Description

System internal error

Remedy

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

Related codes

IBSS-485Power off or Execute param.IBSS-486Power OFF/ON is necessaryIBSS-488Master is not runningIBSS-489Update Dev. Name by Load Conf.

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. How this reference is built →