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FANUC Alarm IBSS-501 — Welding I/O setting is invalid

FANUC IBSS-501 (“Welding I/O setting is invalid”): 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-501 mean?
FANUC IBSS-501 (“Welding I/O setting is invalid”): System internal error
How do you troubleshoot FANUC alarm IBSS-501?
Document the events that led to the error, and call your FANUC or FANUC Robotics technical service representative.

Related codes / Codes liés

IBSS-498len/ofs must be multiple of 16IBSS-500Analog I/O setting is invalidIBSS-502AI/AO needs analog I/O optionIBSS-503Welding I/O needs Arc Tool

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 →