Hi Florin,
I didn't see what the digital input signals are for. But I doubt they work do what you want.
I think you need an Analog Signal applied to Pin 8 VIN that KFLOP by itself doesn't provide.
You might add a 3rd party device that can convert a Step/Dir signal to analog such as this:
https://cnc4pc.com/motion-control/sp...rol-board.html
Or our Kanalog board.
You might use a 1.5V battery to test your drive as described here:
Kanalog Hardware Info - Dynomotion
You might have a MODBUS option but that is fairly complicated.
Regards