Siemens S7-1500 profibus communication with rotork actuator

[marstll 0]

I am trying to set up a Profibus DP connection with a Rotork actuator that controls a valve. Since i dont have a plc or an actuator, I have to try to do everything in the simulator.

I have imported the GSD file from Rotork, and have connection through the profibus network, but i cant for the life of me understand what to do next.

I do not understand what tags or function blocks to use. I'm used to Mitsubishi plc where you get an address to the profibus buffer and use that in the ladder program.

How do i receive and send data to a specific address on the actuator?