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 2026-09-17 · LogrobotLM reference
Description
The FL-net board is not properly mounted on the controller.
Remedy
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
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 →