LogrobotLM

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FANUC Alarm PRIO-495 — Modbus Timeout

FANUC PRIO-495 (“Modbus Timeout”): The Modbus TCP server timed-out while waiting for an I/O message from a Modbus TCP client. First check: Check the Modbus TCP client to verify it is functioning properly.

Updated 2026-09-17 · LogrobotLM reference

Description

The Modbus TCP server timed-out while waiting for an I/O message from a Modbus TCP client.

Remedy

Check the Modbus TCP client to verify it is functioning properly. Adjust the robot Modbus TCP timeout if necessary.

Related codes

PRIO-493Modbus Socket ErrorPRIO-494Modbus Active ClosePRIO-499Modbus System ErrorPRIO-600PNIO board not installed

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 →