LogrobotLM

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FANUC Alarm APSH-048 — WARN PLC comm error - invert check

FANUC APSH-048 (“WARN PLC comm error - invert check”): The backup style group is not the 1's complement (inverse) of the style input group. First check: Verify that the PLC is sending the correct invert style to the correct group.

Updated 2026-08-29 · LogrobotLM reference

Description

The backup style group is not the 1's complement (inverse) of the style input group.

Remedy · Remède

Verify that the PLC is sending the correct invert style to the correct group. Disable invert checking in the PNS Cell Setup menu.

Frequently asked · Questions fréquentes

What does FANUC alarm APSH-048 mean?
FANUC APSH-048 (“WARN PLC comm error - invert check”): The backup style group is not the 1's complement (inverse) of the style input group.
How do you troubleshoot FANUC alarm APSH-048?
Verify that the PLC is sending the correct invert style to the correct group. Disable invert checking in the PNS Cell Setup menu.

Related codes / Codes liés

APSH-046WARN Robot is in Automatic modeAPSH-047WARN Shell will not run without UOPsAPSH-049WARN %sAPSH-050WARN Cell IO setup is invalid

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. · Informations indicatives issues du terrain — le manuel du constructeur et ses procédures de sécurité font foi. Ne shuntez jamais un organe de sécurité ; consignez (LOTO) avant toute intervention physique. How this reference is built →