Hi Ralf
Yes the switches we use from FDS with the led already inside it switch in that way when you push it...
So you right in that it is ON / ON/OFF based on what the software see.
Not sure if poster of question also use FDS switches or that he use something else. I think both way works ON/OFF or ON/ push and it is OFF ( software change it from 0 to 1 or from 1 to 0 again)
gr.
Frans M