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FANUC Alarm DNET-102 — WARN Invalid board MAC Id

FANUC DNET-102 (“WARN Invalid board MAC Id”): The board’s MAC Id is not between 0 and 63. First check: Check the Board Detail screen to see if the board’s MAC Id is between 0 - 63, inclusive.

Updated 2026-09-17 · LogrobotLM reference

Description

The board’s MAC Id is not between 0 and 63.

Remedy

Check the Board Detail screen to see if the board’s MAC Id is between 0 - 63, inclusive. If it is not, change the MAC Id to a valid value and press RESET on the teach pendant. If the MAC Id appears valid, cold start the controller. If the problem persists, document the events that led to the error and call your FANUC Robotics technical representative.

Related codes

DNET-097WARN Connection sync faultDNET-098BROWSE failedDNET-103WARN Invalid board baud rateDNET-104WARN Duplicate MAC Id error

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 →