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-091 — WARN Single step active

FANUC SYST-091 (“WARN Single step active”): The program is in single-step mode. First check: Take the system out of single-step mode.

Updated 2026-08-29 · LogrobotLM reference

Description

The program is in single-step mode.

Remedy · Remède

Take the system out of single-step mode.

Frequently asked · Questions fréquentes

What does FANUC alarm SYST-091 mean?
FANUC SYST-091 (“WARN Single step active”): The program is in single-step mode.
How do you troubleshoot FANUC alarm SYST-091?
Take the system out of single-step mode.

Related codes / Codes liés

SYST-089WARN Machine lock onSYST-090WARN Machine lock forced offSYST-092WARN Single step forced offSYST-093WARN Process not ready

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 →