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SINAMICS general: Transition Micromaster vfd 420 Towards Siemens drives V20

Hi all,
I have to start to replace my broken Micromaster 420's
The Micromaster 420 has been good to us, but now they are no longer available.
So now I have a few V20 Sinamics.
They are small 0.55kW, single phase input, and 3 phase output.
My system requires three pre-set speeds.
I will use DI1,   DI2,  DI3
On my workbench, I can stop and start the test motor by linking 0v to DIC, and 24v to DI1
This  gets my motor running.
But my question is.
How do I program the speed for DI1, and DI2, and DI3 ?
So my selector switch can select speed 1, 2 or 3.
Any guidance most welcome.
Thanks all.

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