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FANUC Alarm DNET-119 — ERR_STOP_C Dup. MAC Ack Fault

FANUC DNET-119 (“ERR_STOP_C Dup. MAC Ack Fault”): Ack Fault-No acknowledge received during Duplicate MAC ID sequence. First check: Check it the Interface is not the only node on the network.

Updated 2026-08-29 · LogrobotLM reference

Description

Ack Fault-No acknowledge received during Duplicate MAC ID sequence.

Remedy · Remède

Check it the Interface is not the only node on the network. Check the baudrate of the interface and make sure it is the network baudrate. Check physical wiring of the network.

Frequently asked · Questions fréquentes

What does FANUC alarm DNET-119 mean?
FANUC DNET-119 (“ERR_STOP_C Dup. MAC Ack Fault”): Ack Fault-No acknowledge received during Duplicate MAC ID sequence.
How do you troubleshoot FANUC alarm DNET-119?
Check it the Interface is not the only node on the network. Check the baudrate of the interface and make sure it is the network baudrate. Check physical wiring of the network.

Related codes / Codes liés

DNET-114WARN Bus fault error detectedDNET-115WARN Invalid I/O connection attemptDNET-120WARN Dev online err: Bd %d MAC %dDNET-121WARN Device not ready: Bd %d MAC %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 →