Larabejo reported the most correct method, Thank you!
This keyboard scared me at first to be very rich and complex, but after following this tip, and read more carefully the manual learning a little stall on the midi commands, I am more comfortable when using the A800 with Logic. Lately very little mouse use when writing, do almost everything on the keyboard.
Just remember to let ACT on and select B1 to B4 buttons to choose which parameters group want to control.
Yesterday I discovered that if you leave activated the SHIFT key (setting the mode always-on, on the keyboard system settings), you can use the arrow keys "<" and ">" to select 8 into 8 groups of tracks in Logic. Very useful.
All the Best,
RPX