LogrobotLM

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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 2026-09-17 · LogrobotLM reference

Description

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

Remedy

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

Related codes

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 … MAC …

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 →