FANUC Alarm TPIF-158 — TP is already connected
FANUC TPIF-158 (“TP is already connected”): You are attempting to connect a teach pendant to a robot that already has a teach pendant connected. First check: To log in to a robot remotely with the iPendant, you must configure an iPendant ring.
Updated 2026-09-17 · LogrobotLM reference
Description
You are attempting to connect a teach pendant to a robot that already has a teach pendant connected.
Remedy
To log in to a robot remotely with the iPendant, you must configure an iPendant ring. Press MENUS to reconnect to the local robot. If you are attempting to log in to a robot remotely with Internet Explorer, verify that the port number is not specified so that the Web Server's default port of 80 will be used.
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 →