You can view the process data objects (PDO's) in a scope project as follows:

1. Select the Image of a device. Then select Enable ADS Server and Create symbols. Note down the ADS port seen on the right.

2. Go to your scope project. Right click and select Target Browser. Select the small wrench, add add the port where the symbols are published on. Click Add.

3. Now there should be an extra target and you can select a variable you want to track.