Device Replacement 
This component allows you to enter the replacement of a device by another device with the same function from the same or similar device category. A device is replaced instead of being both removed and installed if the following data is to be transferred to the new device:
Rate data
Register relationships
Device relationships
Register-related periodic consumption
Disconnected status
You can reverse a technical installation. For more information, see Reversal of Technical Installations, Removals and Replacements
This component is optional because you can also replace a device with the Installation and Removal (ISU-DM-DI-IN or OU) components. However, if you use these components, all links and register relationship are deleted. Therefore, it is often much easier to replace a device. For example, a replacement is necessary if an installed device is damaged or if it is to be certified with the Device Inspection (ISU-DMIS) component.
You can transfer data to external systems using IDoc ISU_RPL_ORDER.
Further information on IDocs:
For general information, see IDoc Interface/Electronic Data Interchange
For detailed information, see Using Documentation Tools
Here you determine which documentation you can display for a certain IDoc.
You can use enhancement EDMEG901 to change the predefined order and notification codes when work orders or notifications are created.
In the case of a replacement, you can enter meter readings recorded at the time of installation or removal.
A device may lose lot membership or certification regardless of the activity reason.For more information, go to Customizing and choose Define System Parameters for Installation/Removal/Replacement .