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-186WARN CNET Invalid Header size

FANUC PRIO-186 (“WARN CNET Invalid Header size”): The input header size in case of scanner mode or the output header size in case of adapter is invalid. First check: Enter a valid header size.

Updated 2026-08-29 · LogrobotLM reference

Description

The input header size in case of scanner mode or the output header size in case of adapter is invalid.

Remedy · Remède

Enter a valid header size. The valid header is less that or equal to the total connection size. The total connection size is a sum of the I/O size and the header size.

Frequently asked · Questions fréquentes

What does FANUC alarm PRIO-186 mean?
FANUC PRIO-186 (“WARN CNET Invalid Header size”): The input header size in case of scanner mode or the output header size in case of adapter is invalid.
How do you troubleshoot FANUC alarm PRIO-186?
Enter a valid header size. The valid header is less that or equal to the total connection size. The total connection size is a sum of the I/O size and the header size.

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 →