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FANUC Alarm DNET-077 — WARN DNet I/O inactive at CTRL start

FANUC DNET-077 (“WARN DNet I/O inactive at CTRL start”): At controlled start, I/O data assigned to DeviceNet devices is not active. First check: This message is for informational purposes only .

Updated 2026-08-29 · LogrobotLM reference

Description

At controlled start, I/O data assigned to DeviceNet devices is not active.

Remedy · Remède

This message is for informational purposes only . To make DeviceNet I/O active, COLD start the controller.

Frequently asked · Questions fréquentes

What does FANUC alarm DNET-077 mean?
FANUC DNET-077 (“WARN DNet I/O inactive at CTRL start”): At controlled start, I/O data assigned to DeviceNet devices is not active.
How do you troubleshoot FANUC alarm DNET-077?
This message is for informational purposes only . To make DeviceNet I/O active, COLD start the controller.

Related codes / Codes liés

DNET-074ERR_STOP_C Load only at ctrl startDNET-076WARN $DN_DEV_DEFS array is fullDNET-078WARN No room for more devicesDNET-079ERR_STOP_C Unknown dev type: 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 →