Thanks for your help, fisherking and David.
It has been quite an odyssey to get this controller working the last days...
I found out that I should give the knobs different cc values. Instead starting with 0, I started with 36.
Then I sent this to program 1. Now in Logic I could see incoming midi data in the transport window when I turned the knobs.
So I was able to map cutoff, resonance, envelope and keyboard from my synth filter to the first 4 knobs.
So next to find out is if can use the same knobs for a different plug in, like an Equaliser.
Probably I need to safe it to program 2, right?
I am really a Noob with this controller surfaces 😕