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FANUC Alarm PRIO-186 — WARN 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 2026-09-17 · LogrobotLM reference

Description

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

Remedy

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

PRIO-184WARN CNET Connection IdlePRIO-185WARN CNET Config Er … …PRIO-187WARN CNET Invalid Num of SlotsPRIO-188Sim. Skip output not defined

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 →