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FANUC Alarm SYST-139 — WARN Invalid motherboard request

FANUC SYST-139 (“WARN Invalid motherboard request”): The specified motherboard index is not a valid value. First check: This is a programming error.

Updated 2026-08-29 · LogrobotLM reference

Description

The specified motherboard index is not a valid value.

Remedy · Remède

This is a programming error. Specify only index 0 or 1

Frequently asked · Questions fréquentes

What does FANUC alarm SYST-139 mean?
FANUC SYST-139 (“WARN Invalid motherboard request”): The specified motherboard index is not a valid value.
How do you troubleshoot FANUC alarm SYST-139?
This is a programming error. Specify only index 0 or 1

Related codes / Codes liés

SYST-137WARN Device not foundSYST-138WARN Motherboard not installedSYST-140WARN Invalid IRQ specifiedSYST-141WARN BMON was updated

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 →