LogrobotLM

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FANUC Alarm MOTN-255 — STOP OFIX: Detect J4 is not 0

FANUC MOTN-255 (“STOP OFIX: Detect J4 is not 0”): Detect J4 is not zero angle during interpolation. First check: Confirm start and destination position are both J4 = 0 position.

Updated 2026-08-29 · LogrobotLM reference

Description

Detect J4 is not zero angle during interpolation.

Remedy · Remède

Confirm start and destination position are both J4 = 0 position.

Frequently asked · Questions fréquentes

What does FANUC alarm MOTN-255 mean?
FANUC MOTN-255 (“STOP OFIX: Detect J4 is not 0”): Detect J4 is not zero angle during interpolation.
How do you troubleshoot FANUC alarm MOTN-255?
Confirm start and destination position are both J4 = 0 position.

Related codes / Codes liés

MOTN-253STOP OFIX: Motion type mismatchMOTN-254STOP OFIX: Detect large spinMOTN-256STOP OFIX: TCP config limitMOTN-257STOP Wrist start angle mismatch

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 →