LogrobotLM

LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free → · Le diagnostic IA qui lit la sauvegarde de votre robot, sans rien téléverser.

FANUC Alarm SYST-126 — WARN No task-OK output defined

FANUC SYST-126 (“WARN No task-OK output defined”): The task_OK output, which is required with the current program selection options, has not been defined. First check: Set up a task-OK output in the Cell Output I/O menu and restart the robot.

Updated 2026-08-29 · LogrobotLM reference

Description

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

Remedy · Remède

Set up a task-OK output in the Cell Output I/O menu and restart the robot.

Frequently asked · Questions fréquentes

What does FANUC alarm SYST-126 mean?
FANUC SYST-126 (“WARN No task-OK output defined”): The task_OK output, which is required with the current program selection options, has not been defined.
How do you troubleshoot FANUC alarm SYST-126?
Set up a task-OK output in the Cell Output I/O menu and restart the robot.

Related codes / Codes liés

SYST-124WARN No decision output group definedSYST-125WARN No in-cycle output definedSYST-127WARN No isolate output definedSYST-128WARN No interlock output defined

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 →