FANUC Alarm SCIO-034 — Illegal fn code of TUI FN instruction
FANUC SCIO-034 (“Illegal fn code of TUI FN instruction”): An illegal FN code is found in the TUI FN instruction. First check: The program might be broken.
Updated 2026-09-17 · LogrobotLM reference
Description
An illegal FN code is found in the TUI FN instruction.
Remedy
The program might be broken. The system software might be older than where the program is made. Delete the program and make a new one.
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 →