ETS6 Local Interface Setup guide ??

Ive got a simple setup with a few Gira keypads and a Siemens5WG1 KNX interface.

I have the settings configured but Im missing the Individual Address.

Where do I find this address?? Also, do I need to add this Interface as a device in Buildings?

I am getting the error: Could not connect to IP interface (The interface device detected an error concerning the KNX medium connection)

Is there a setup guide for this?? I looked in the