LogrobotLM

LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free → · Le diagnostic IA qui lit la sauvegarde de votre robot, sans rien téléverser.

FANUC Alarm APSH-052 — WARN Critical UOP inputs are LOW

FANUC APSH-052 (“WARN Critical UOP inputs are LOW”): UOP inputs #1 (IMSTP), #2 (HOLD), #3(SFTYFNC), #8 (ENBL) are all LOW. First check: See for APSH-051, Connect or deassign UOP inputs.

Updated 2026-08-29 · LogrobotLM reference

Description

UOP inputs #1 (IMSTP), #2 (HOLD), #3(SFTYFNC), #8 (ENBL) are all LOW. These must

Remedy · Remède

See for APSH-051, Connect or deassign UOP inputs.

Frequently asked · Questions fréquentes

What does FANUC alarm APSH-052 mean?
FANUC APSH-052 (“WARN Critical UOP inputs are LOW”): UOP inputs #1 (IMSTP), #2 (HOLD), #3(SFTYFNC), #8 (ENBL) are all LOW. These must
How do you troubleshoot FANUC alarm APSH-052?
See for APSH-051, Connect or deassign UOP inputs.

Related codes / Codes liés

APSH-050WARN Cell IO setup is invalidAPSH-051WARN Connect or deassign UOP inputsAPSH-054PAUSE Release SOP E-STOPAPSH-055PAUSE Raise UOP IMSTP input

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 →