Hello Razvan,
In the editor you don't have "live" values from the PLCs / IEDs. For some communication drivers, when you do an online import of the variables from the PLC, you may also see the value, but this is not generally the case. You need the runtime for live values.
It is easy enough to create a screen of the type "variable diagnosis", create a screen switch function to configure the variables you want to see and start the runtime on the same system as the zenon editor, to see the live values. Provided of course that the system with the zenon editor can communicate with the PLCs / IEDs.
Best regards,
Mark