LogrobotLM

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FANUC Alarm PRIO-281 — FL-net PCB not installed

FANUC PRIO-281 (“FL-net PCB not installed”): The FL-net board is not properly mounted on the controller. First check: If you want to use the FL-net function, insert the FL-net board properly.

Updated 2026-08-29 · LogrobotLM reference

Description

The FL-net board is not properly mounted on the controller.

Remedy · Remède

If you want to use the FL-net function, insert the FL-net board properly. If you do not want to the FL-net function, clear the common memory and I/O settings for all nodes. This alarm is displayed when the I/O setting is configured for at least one node.

Frequently asked · Questions fréquentes

What does FANUC alarm PRIO-281 mean?
FANUC PRIO-281 (“FL-net PCB not installed”): The FL-net board is not properly mounted on the controller.
How do you troubleshoot FANUC alarm PRIO-281?
If you want to use the FL-net function, insert the FL-net board properly. If you do not want to the FL-net function, clear the common memory and I/O settings for all nodes. This alarm is displayed when the I/O setting is configured for at least one node.

Related codes / Codes liés

PRIO-268WARN IO LinkII(M) RX Buf overflowPRIO-280FL-net System Error(%d)PRIO-282FL-net PCB Abnormal(%d)PRIO-283FL-net IP Address Incorrect

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 →