I investigated a little further and came to the following conclusion:
the Blind-shutter-Modules don't listen to XDIM, but to different extended codes, each extended code number is a specific position of the blind.
I had a closer look at how ActiveHome Professional handles it, and if you take a look in the Activity history, you see a major difference between ActiveHome and mochad/ncat:
if you try to "XDIM 96" the module with NCAT, you get the following result
TX PL HouseUnit: B10 Func: Ext Code 1, Data, Control Data, 60
when controlling the SW12 modul at address B10, you get the following entries:
TRANSMIT B10 Extended code 18 1
*) B10 is the address,
*) 18 is the hex value for the position. There are 25 Positions, in 4% steps between 0 and 100. 18hex = 24 = 24*4 = 96% open. If you "dim" it to 8%, you get a "Extended code 2", 60% is "Extended code F", and so on... so, the range is between 0hex and 18hex.
*) 1 seems to be a fixed value
now, the major question: is this possible in mochad, maybe in an updated version?
Will gladly volunteer for testing...
regards
Doogie