LogrobotLM

LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free →

FANUC Alarm HOST-245 — Illegal Hostname

FANUC HOST-245 (“Illegal Hostname”): The robot name configured for the TCP/IP interface is illegal. First check: Change the robot Hostname in the Host Comm TCP/IP screen to a legal name.

Updated 2026-09-17 · LogrobotLM reference

Description

The robot name configured for the TCP/IP interface is illegal.

Remedy

Change the robot Hostname in the Host Comm TCP/IP screen to a legal name. A legal Hostname is a text string of characters drawn from the alphabet (A-Z, a-z), digits (0-9), and minus sign (-). No blank or space characters are permitted as part of a name, nor is the underscore character (_). The first character must be an alpha character. The last character must not be a minus sign.

Related codes

HOST-243ACD: duplicate IP …HOST-244Ethernet ThrottleHOST-246Illegal Hosttable Entry … …HOST-260GigE: Invalid Handle

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 →