You have to configure your CSS to connect to your EPICS system before BOY can connect to a real PV.
This is configured in the preference page CSS->Preferences->CSS Core->EPICS
. For more details,
please see here
In BOY, just specify the PV Name property of a PV widget will make the widget connect to the PV automatically in run mode.
There is a common look for all the diconnected PV widgets:
If the PV is not allowed to write, the control widgets will be disabled.