If you want to test the remote computer then you can press the Button Test on the tab Distribution. If you use your own computer (localhost) as a simulation machine then you see the Plant Simulation process in the taskbar.
What is your purpose for the investigation the remote process?
Typically, it is not helpful if you see a lot of processes in the taskbar.
I can understand hiding them from the user when running distributed experiments on localhost. In this case I'm starting the remote instances via RPC on other computers and I want to make sure that they are terminating correctly since for this version they just stop when the simulation is finished without actually reporting back.
Just making sure that they are behaving correctly and using Test here merely tests the ability to start the process?
You are right, the Test button checks whether the remote process can start and a model can load. This is also a license check.
In a future version it will be possible to adjust whether the Plant Simulation processes are visible during a distributed simulation. This is a reasonable enhancement.
That you can continue to work, I recommend the following change (only for version 12.2 of Plant Simulation and a version 12 of the Experimentmanager):
1. Unlock the Library DistributedSimulation (via context menu: Edit Library Information)
2. Open the method
3. The instruction eMPlant.setVisible(true) in row 15 must be done even if it is not a test.
In other words, you must remove the condition in rows 14 and 16.