FANUC Alarm GUID-400 — WARN Cursor not on ARC START line
FANUC GUID-400 (“WARN Cursor not on ARC START line”): The simple Teach execution function key has been pressed in teach pendant editor screen before moving cursor to ARC start line. First check: Move the cursor to the ARC start line, then press the Simple Teach execution function key.
Updated 2026-09-17 · LogrobotLM reference
Description
The simple Teach execution function key has been pressed in teach pendant editor screen before moving cursor to ARC start line. Without knowing which ARC segment needs to be converted/searched, Simple Teach cannot be run.
Remedy
Move the cursor to the ARC start line, then press the Simple Teach execution function key.
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 →