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FANUC Alarm DNET-074 — ERR_STOP_C Load only at ctrl start

FANUC DNET-074 (“ERR_STOP_C Load only at ctrl start”): An I/O configuration file (.IO file) containing DeviceNet configuration data was loaded at COLD START. First check: Reload the .IO file at controlled start.

Updated 2026-08-29 · LogrobotLM reference

Description

An I/O configuration file (.IO file) containing DeviceNet configuration data was loaded at COLD START. The DeviceNet configuration data in this file is ignored.

Remedy · Remède

Reload the .IO file at controlled start.

Frequently asked · Questions fréquentes

What does FANUC alarm DNET-074 mean?
FANUC DNET-074 (“ERR_STOP_C Load only at ctrl start”): An I/O configuration file (.IO file) containing DeviceNet configuration data was loaded at COLD START. The DeviceNet configuration data in this file is ignored.
How do you troubleshoot FANUC alarm DNET-074?
Reload the .IO file at controlled start.

Related codes / Codes liés

DNET-072WARN Found dupl. DNet daughterboardDNET-073WARN No match on mod type look-upDNET-076WARN $DN_DEV_DEFS array is fullDNET-077WARN DNet I/O inactive at CTRL start

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 →