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FANUC Alarm SPOT-034 — PAUSE Backup close fault …

Manufacturer wording — PAUSE Backup close fault %s
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC SPOT-034 (“PAUSE Backup close fault …”): The BU Close Detect input was not received within the specified timeout period. First check: Verify the input is assigned correctly; verify the input is being made when the backup gun is closed; or if needed, increase the timeout value (in $spoteqsetup.$bu_cl_to).

Updated 2026-09-17 · LogrobotLM reference

Description

The BU Close Detect input was not received within the specified timeout period.

Remedy

Verify the input is assigned correctly; verify the input is being made when the backup gun is closed; or if needed, increase the timeout value (in $spoteqsetup.$bu_cl_to).

Related codes

SPOT-032PAUSE Gun close fault …SPOT-033PAUSE Backup open fault …SPOT-035PAUSE Invalid equipment (… defined)SPOT-036PAUSE Invalid weld controller (… defined)

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 →