Native Mode support for the FaderPort requires installation of the Faderport Control application released on Dec 19, 2017.
1. Visit the FaderPort download page to get the release and run it to install it.
2. Run your DAW with FaderPort connected.
Open Logic and the application should by default detect the Faderport and automatically create a control surface entry for the Faderport, and it should be ready to use.
If Logic does not install it automatically, all you should need to do is add the Faderport in Logic > Control Surfaces > Setup as you would normally. See here for more info.