GPI RS232 RS422 etc.

Dear Guys,

I#m am going to set up a new show with the following equipment:
a PC running Ableton live
My PM5D RH
ScreenAV

My user-define button sends a midi-note to play clips from ableton-live and to change scenes in the PM5D.

What i have to figure out is how to send play, pause, next,... commands to an RS232 remotable device(wich controls my screenAV Videoplayback)(watch screenav.de).
Did anyone try that?
Maybe fader-start-things could work.

Any ideas?

thx a lot

You can configure a fader start from the GPI outs ports. In the user manual is described how to do that.