FANUC Alarm HOST-115 — PROXY: … listen error
Manufacturer wording — PROXY: %s listen error
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC HOST-115 (“PROXY: … listen error”): The robot controller Proxy was not able to listen on a TCP network socket. First check: This alarm generally implies that either the Proxy or the TCP/IP interface is not set up correctly.
Updated 2026-09-17 · LogrobotLM reference
Description
The robot controller Proxy was not able to listen on a TCP network socket.
Remedy
This alarm generally implies that either the Proxy or the TCP/IP interface is not set up correctly. Verify network connectivity to the robot controller using the ping utility (on the robot, and also on the local PC). Check for abnormal activity with all installed Internet options. Obtain the ethernet.dg file from the MD: device, document the events that led to the error, and call your FANUC or FANUC Robotics technical representative.
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 →