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FANUC Alarm SPOT-227 — PAUSE GUN OPEN DETECT timed out …-both guns

Manufacturer wording — PAUSE GUN OPEN DETECT timed out %s-both guns
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC SPOT-227 (“PAUSE GUN OPEN DETECT timed out …-both guns”): The robot timed out waiting for the gun to open. First check: Check the Equipment I/O menu, as well as all wiring.

Updated 2026-09-17 · LogrobotLM reference

Description

The robot timed out waiting for the gun to open.

Remedy

Check the Equipment I/O menu, as well as all wiring. If the input is going high, try increasing the timeout by setting $spoteqsetup[].$bu_cl_to (gun open = backup close) to a bigger number. The default is 2000 ms, or 2 seconds.

Related codes

SPOT-225PAUSE GUN CLOSE DETECT timed out …-both gunsSPOT-226PAUSE BACKUP OPEN DETECT timed out …-both gunsSPOT-235PAUSE Bad pressure-both gunsSPOT-236PAUSE Reset welder timeout …-both guns

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 →