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FANUC Alarm PRIO-622 — PNIO(C) controller is not running

FANUC PRIO-622 (“PNIO(C) controller is not running”): The start up of I/O Controller has not completed or was terminated by an error. First check: Disable the I/O Controller if the I/O Controller function is not used.

Updated 2026-09-17 · LogrobotLM reference

Description

The start up of I/O Controller has not completed or was terminated by an error.

Remedy

Disable the I/O Controller if the I/O Controller function is not used. If the I/O Controller function is used, check if there are any errors related to the I/O Controller. This error will be eliminated when the setting of I/O Controller is correct and communication to the I/O Device is established.

Related codes

PRIO-620PNIO(C) station … deactivatedPRIO-621PNIO(D) device is not runningPRIO-623PNIO(C) not in operation modePRIO-624PNIO(C) mod number mismatch

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 →