I expect the 800 means Panasonic:128.0 and the 804 means Panasonic:128.4 and the "Data Code" translated from hex to decimal would be the OBC number 3D is 61, DE is 222, etc.

With that information you can easily create the signals using MakeHex (which I don't have on this computer, but will post results tomorrow if no one beats me to it).

I do wonder what they mean by listing the same command for POWER ON as for POWER OFF. If that a typo or a strange way of saying there is no discrete?

I also wonder what more Jon wants from the document, since Jon knows everything I just said above (as well as complete details of how Panasonic uses the Kaseikyo Format).