LogrobotLM

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FANUC Alarm APSH-040 — WARN No backup input group defined

FANUC APSH-040 (“WARN No backup input group defined”): The backup input group, which is needed with the current communication configuration, has not been defined. First check: Set up a Backup Style Select group in the Cell output I/O and GROUP I/O menus and restart the robot.

Updated 2026-09-17 · LogrobotLM reference

Description

The backup input group, which is needed with the current communication configuration, has not been defined.

Remedy

Set up a Backup Style Select group in the Cell output I/O and GROUP I/O menus and restart the robot.

Related codes

APSH-038WARN No style input group definedAPSH-039WARN No style ack strobe definedAPSH-041WARN No style input strobe definedAPSH-042WARN …

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 →