FANUC Alarm PRIO-601 — PNIO watchdog alarm
FANUC PRIO-601 (“PNIO watchdog alarm”): PROFINET software on the robot controller is not working First check: Cycle power the robot controller.
Updated 2026-09-17 · LogrobotLM reference
Description
PROFINET software on the robot controller is not working
Remedy
Cycle power the robot controller. Consult a FANUC service representative if this error occurs repeatedly.
Related codes
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 →