Here is a detailed video showing how to use the Ketron Sd90 with Yamaha Tyros 5. Genos should be very similar I believe...

https://youtu.be/WBZMMUeY6lI

On the midi transmit menu of Genos, set:-
Upper =1
Lower =1
Make sure nothing else is transmitting on channel 1.

On SD90, set midi RX as follows:-
Global =1
Everything else = off

Launchpad delay:- Make sure you turn on Genos first ....when completely powered on, then turn on SD90 to avoid any unwanted midi data sent to sd90. If you want to sync both, turn on midi transmit clock internal = on, and on SD90, midi external clock on, however make sure you use a very short midi cable, else especially with audio elements being used, you will experience some lag.

Genos sliders can control SD90 arranger if you can program midi sysex messages into Genos.

Hope this helps.

Thanks.

AJ