Connecting aztec600(profibus slave) to gateway(profibus-modbus) to rvg200(modbus master)

Hello everyone,

I hope you can help me solve this issue. I have aztec600 with 4 variable inputs and act as profibus slave with byte 1 to 4 = input 1; byte 5 = status AI1; byte 6 to 9 = input 2 and so on then gateway converts profibus byte 1 to 4 into byte 0 to 3 in modbus protocol and RVG200 as a master and i can call AI byte 0 to 3: I just input address: 1, register 0 and data type IEEE.

My problem is the AI 2 and AI4, how can i call them in RVG200??