'Device Replacement Without Engineering' is a PROFINET function that allows a failed IO Device to be replaced by an unconfigured new unit of the same model, with the PLC then automatically assigning the Name of Station and IP address via LLDP/DCP and downloading the configuration.
True
The plug-and-replace procedure requires zero engineering intervention: the faulty device is identified by a diagnostic alarm, maintenance unplugs it and connects the new one on the same ports, the PLC detects through LLDP that the new device sits in the port previously occupied by Device X, then sends a DCP 'Set Name' to assign the original Name of Station, and finally downloads the configuration (modules, parameters) automatically. The device is back in operation within a few seconds, which cuts MTTR (Mean Time To Repair) from hours to minutes and has become a standard expectation in Industry 4.0 deployments.
Stock spares as truly unconfigured units and never as 'pre-named' clones — a spare that already carries a Name of Station collides with the function and forces a manual factory reset on the shop floor.
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