If you run a futaba 'traditional' receiver, you have to select 5R/C from the Options Tab ( orange ).. and plug Tilt, Roll, Pan, and Throttle(or a switch ) to i1,i2,i3,i4 on Picloc ( RX separates input )
For PPM SUM, you need to have a receiver that outputs PPMSUM...
I use Jeti Duplex TX Module...