Get a incremantal Counter

[ThomaSN]

I searched in different topics hear, but haven't found a solution for my problem.

How can I divide the counter into groups automatically?

The visualisation show a operation counter, which start by zero when the "Counter_Operation Hour" is resetet by a cleaning process.

The Datas looks like the table below. I have no idea how to create the red column in PowerBI.  

I would also be pleased if you could give me hints for the solution of two pieces of equipment (cleaner 1 and cleaner2):-/.

Can anyone help?

Thanks you