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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 2026-09-17 · LogrobotLM reference

Description

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

Remedy

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

Related codes

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. How this reference is built →