Cause

In the parts database to be checked a PLC part was determined where a non-unique device identification is assigned.

Identification of the devices in EPLAN is effected either by means of the PLC type designation or by specifying a device description file. In the concrete case the same PLC type designation or the same device description data was assigned to several PLC parts.

Solution

1. In the message management dialog mark the line with the message and select the Properties popup menu item.
   
   The Parts management dialog is opened, the respective part is already marked in it.
2. Bring the Properties tab to the front.
3. In the property table open the hierarchy level PLC data.
4. Correct the entry either in the value field of the PLC type designation property or the Device description: File name property.
5. Click [OK].
6. Close the parts management, save the modified data, and carry out a parts synchronization.
7. If required, start a new check run.