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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 2026-09-17 · LogrobotLM reference

Description

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

Remedy

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

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

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 →