LogrobotLM

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 DNET-003 — ERR_STOP_C Too many DNet motherboards

FANUC DNET-003 (“ERR_STOP_C Too many DNet motherboards”): There are too many DeviceNet motherboards connected to the robot controller. First check: Turn off controller power.

Updated 2026-08-29 · LogrobotLM reference

Description

There are too many DeviceNet motherboards connected to the robot controller.

Remedy · Remède

Turn off controller power. Disconnect one of the DeviceNet motherboards. Re-connect any DeviceNet cables to the other DeviceNet motherboard. Power on your controller.

Frequently asked · Questions fréquentes

What does FANUC alarm DNET-003 mean?
FANUC DNET-003 (“ERR_STOP_C Too many DNet motherboards”): There are too many DeviceNet motherboards connected to the robot controller.
How do you troubleshoot FANUC alarm DNET-003?
Turn off controller power. Disconnect one of the DeviceNet motherboards. Re-connect any DeviceNet cables to the other DeviceNet motherboard. Power on your controller.

Related codes / Codes liés

DNET-001ERR_STOP_C No system device fileDNET-002ERR_STOP_C No application device fileDNET-004ERR_STOP_C Board init failed: Bd %dDNET-005WARN User dev def Err, line:%d

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 →