KUKA KRC2 External controller connections

hi,

I use an krc2 controller which i need to connect it with external plc to run the required program by selecting models from plc, using binary values to control prog number to robot how do i need to configure the pin in hardware side eg; my bit length is 7 where i need to configure it in krc2 controller and where do i need to connect those 7 wires from plc to krc2 controller krc2 controller is equipped with wago device net with 32I/O pins.how and where do i need to connect system variable values.

Since i'm working with a refurnished robot, it has a device net with 32-IO could it be able to connect, like discrete IO from PLC to the IO in the device net by sending prog number in binary format. eg: