FANUC Alarm HOST-216 — WARN SM: Invalid Socket
FANUC HOST-216 (“WARN SM: Invalid Socket”): A request was received for a socket which is invalid First check: Re-establish the connection.
Updated 2026-09-17 · LogrobotLM reference
Description
A request was received for a socket which is invalid
Remedy
Re-establish the connection.
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 →