...If it not possible to do this with ActiveHome Pro then I may as well stick with my original version.
It has nothing to do with the software: ActiveHome [Original] vs ActiveHome Pro. It's the underlying hardware that controls it.
...I was under the impression that the computer interface only issued the brighten to 100% then dim to the desired value and 'hoped' it would work rather than getting feedback from the dimmer unit to say it had completed.
Except for the *THREE* two-way modules, there is no *FEEDBACK* in the X-10 world.
...Maybe I will look at a more complex macro that dims all the lights to the same value first then dims them individually to the correct brightness.
Aesthetically, that sounds like it would support your goal - but, why do you feel that it would be a "more complex macro"? It will still be 3 steps:
- A1, A2, A3: DIM 60% (absolute)
- A2: DIM 20% (relative)
- A3: BRIGHTEN 40% (relative)
Is there any documentation available for the .MAC file format I could read through?
None that I've come across so far. But, just open one up and you'll see how easy it is to understand what's going on.