Vmb1dm dimmer

Good afternoon,

I want to replace my old domotica system with 8 dimmers and 12 relays.
I test the relays and they work perfect ( staircase lighting timer and so on )

Today I test the dimmer module, but I can not find a combination with
dimmer and staircase lighting ( stop the light in my bathroom after 1 hour f.e. )

What’s the staircase function doing in the dimmer module ?

I start the Velbus only with push buttons. Later with the software.