Network - Mutli servers and Mutli Clients

Network - Mutli servers and Mutli Clients

Hello everyone.
Here's my question.
Hi have two single projects on the same plant with two PCs.
Each one running one project.
I'd like to display variables values of each runtime on each other one.
If I say right to do so, I need to define one of the projects as an integration project - let's call it PRO-1, and drag the second - let's call it PRO-2 - one in the first.
Doing so, I can display the values from PRO-2 on PRO-1, but not values from PRO-1 on PRO-2 ?
Am I missing something ?
In the Network Manual, it's written :
" Mutli-Clients and Mutli-Servers Model"
--> In this Model, a computer can be a server for one project, as well as a client for another project.
A computer can also be multi-servers and multi-clients in the same time.
So I was guessing it was posible to do what I'm expecting, but I'm also wondering if I need a 3rd PC running a blank project as the Integration project. (And of course I'd prefer not to have to use a third computer.)
Thanks for your answers !

This is a migrated post! Originally posted on 01.08.2016 by user bastien. Please be aware that information can be outdated.