LogrobotLM

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FANUC Alarm SYST-128 — WARN No interlock output defined

FANUC SYST-128 (“WARN No interlock output defined”): The interlock mode output, which is required with the current program selection options, has not been defined. First check: Set up an interlock mode output in the Cell Output I/O menu and restart the robot.

Updated 2026-08-29 · LogrobotLM reference

Description

The interlock mode output, which is required with the current program selection options, has not been defined.

Remedy · Remède

Set up an interlock mode output in the Cell Output I/O menu and restart the robot.

Frequently asked · Questions fréquentes

What does FANUC alarm SYST-128 mean?
FANUC SYST-128 (“WARN No interlock output defined”): The interlock mode output, which is required with the current program selection options, has not been defined.
How do you troubleshoot FANUC alarm SYST-128?
Set up an interlock mode output in the Cell Output I/O menu and restart the robot.

Related codes / Codes liés

SYST-126WARN No task-OK output definedSYST-127WARN No isolate output definedSYST-129WARN No manual style output definedSYST-130WARN Program still running

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 →