FANUC Alarm PRIO-351 — EtherNet/IP Cannot Open Socket
FANUC PRIO-351 (“EtherNet/IP Cannot Open Socket”): The robot EtherNet/IP scanner was not able to open a TCP or UDP network socket. First check: This alarm generally implies that the Ethernet or TCP/IP interface is not set up correctly.
Updated 2026-08-29 · LogrobotLM reference
Description
The robot EtherNet/IP scanner was not able to open a TCP or UDP network socket.
Remedy · Remède
This alarm generally implies that the Ethernet or TCP/IP interface is not set up correctly. For example, if no IP address is defined, then the EtherNet/IP cannot initialize. Verify network connectivity using the ping utility (on the robot and also on the local PC). If the problem persists, document the events that led to the alarm, and call your FANUC or FANUC Robotics technical representative.
Frequently asked · Questions fréquentes
- What does FANUC alarm PRIO-351 mean?
- FANUC PRIO-351 (“EtherNet/IP Cannot Open Socket”): The robot EtherNet/IP scanner was not able to open a TCP or UDP network socket.
- How do you troubleshoot FANUC alarm PRIO-351?
- This alarm generally implies that the Ethernet or TCP/IP interface is not set up correctly. For example, if no IP address is defined, then the EtherNet/IP cannot initialize. Verify network connectivity using the ping utility (on the robot and also on the local PC). If the problem persists, document the events that…
Related codes / Codes liés
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 →