Here are the protocols supported by ProviewR.
I do not use Profibus or Profinet, I just saw the protocols in the selection menu.
I am mainly using the Modbus_TCP protocol.
As far as how to use the protocol, I would start with the man_gsg.pdf(getting started guide) and the man_iog.pdf (io guide). Download these from the Documentation section on this web site.
If I remember correctly, there are also a few MODBUS examples in the forum. After you go through these pdf's, if you are still having trouble come back and I will help if I can. I'm sure Claes is tired of all the questions.
The basic outline is that you create a new project, create new variables, select the protocol for your node, wire/attach your new variables to the protocol IO, and then compile and test. I found that having wireshark on the Proview computer is very advantageous.
I have set up a 20GB VM (virtual machine) as a development platform.
Due to the complexity of Proview my idea is to distribute Proview as a complete VM to help new people get started.