In your Project tree, expand External source files and select Add new external file. Browse to the location on your PC where you saved the UDT file you downloaded from In this example we are using ConveyLinx Family modules so we select the corresponding file.
Once you select the file, it will appear as an item in the External source files folder. Select the file, right click, and select Generate blocks from source.
Once the blocks have been generated, you can go to the PLC data types folder in the Project tree and expand the folder to see the UDTs generated. In this example, all of the UDTs required for the ConveyLinx Family have been generated.