This article applies to this model FaderPort:
Native Mode support for the FaderPort Classic requires installation of the Faderport Control application released on July 10, 2018.
1. Visit the FaderPort Classic download page to get the release and run it to install it.
2. Run your DAW with FaderPort Classic connected to your computer.
Open Logic and the application should by default detect the Faderport Classic and automatically create a control surface entry for the Faderport Classic, and it should be ready to use.
If Logic does not install it automatically, all you should need to do is add the Faderport Classic in Logic > Control Surfaces > Setup as you would normally. See here for more info.