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 PRIO-178WARN Blk scns lost; %d %d %d

FANUC PRIO-178 (“WARN Blk scns lost; %d %d %d”): A group of consecutive scans were lost; if n1=1, scans were lost on the main processor; if n1 = 2, scans were lost on the communications processor; n2 = number of lost scans; if n2 is less than 5, thi First check: Review software configuration to determine how loading can be reduced.

Updated 2026-08-29 · LogrobotLM reference

Description

A group of consecutive scans were lost; if n1=1, scans were lost on the main processor; if n1 = 2, scans were lost on the communications processor; n2 = number of lost scans; if n2 is less than 5, this may not be a serious problem; n3 = total scans since pwr up since power-up. Generally indicates overloading of the indicated processor.

Remedy · Remède

Review software configuration to determine how loading can be reduced.

Frequently asked · Questions fréquentes

What does FANUC alarm PRIO-178 mean?
FANUC PRIO-178 (“WARN Blk scns lost; %d %d %d”): A group of consecutive scans were lost; if n1=1, scans were lost on the main processor; if n1 = 2, scans were lost on the communications processor; n2 = number of lost scans; if n2 is less than 5, this may not be a serious problem; n3 = total scans since pwr up since…
How do you troubleshoot FANUC alarm PRIO-178?
Review software configuration to determine how loading can be reduced.

Related codes / Codes liés

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 →