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-231 — RCRON: Action failed

FANUC SYST-231 (“RCRON: Action failed”): RCRON command could not be executed. First check: Check md:crontab.dg for errors.

Updated 2026-08-29 · LogrobotLM reference

Description

RCRON command could not be executed. This is caused by either an incorrect crontab file or by the corresponding module not being loaded on the controller.

Remedy · Remède

Check md:crontab.dg for errors.

Frequently asked · Questions fréquentes

What does FANUC alarm SYST-231 mean?
FANUC SYST-231 (“RCRON: Action failed”): RCRON command could not be executed. This is caused by either an incorrect crontab file or by the corresponding module not being loaded on the controller.
How do you troubleshoot FANUC alarm SYST-231?
Check md:crontab.dg for errors.

Related codes / Codes liés

SYST-223Image backup failed(0x%x)SYST-230RCRON: Action successfulSYST-232RCRON: Tick missedSYST-233RCRON: No response from MAIN

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 →