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 PRIO-623 — PNIO(C) not in operation mode

FANUC PRIO-623 (“PNIO(C) not in operation mode”): The start up of I/O Controller has completed but the start up mode is not OPERATION. First check: Change the start mode to OPERATION, and cycle power on the robot controller.

Updated 2026-08-29 · LogrobotLM reference

Description

The start up of I/O Controller has completed but the start up mode is not OPERATION.

Remedy · Remède

Change the start mode to OPERATION, and cycle power on the robot controller.

Frequently asked · Questions fréquentes

What does FANUC alarm PRIO-623 mean?
FANUC PRIO-623 (“PNIO(C) not in operation mode”): The start up of I/O Controller has completed but the start up mode is not OPERATION.
How do you troubleshoot FANUC alarm PRIO-623?
Change the start mode to OPERATION, and cycle power on the robot controller.

Related codes / Codes liés

PRIO-621PNIO(D) device is not runningPRIO-622PNIO(C) controller is not runningPRIO-624PNIO(C) mod number mismatchPRIO-625PNIO(C) read in complete

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 →