Dynamically-created virtual objects provide monitor access to the entire component structure of each remote controller station
without the overhead (or engineering necessity) of using proxy points. They provide write access to most component properties.
A NiagaraStation under a
Supervisor station contains the Virtual container with these object.
A small virtual ghost icon superimposed in the lower right over a normal component icon reminds you that you are looking at
a virtual component.
The large scale application for virtual components is in a
Supervisor station where proxy point values in remote controller stations can be modeled, graphically presented on Px pages hosted by
the
Supervisor and then deleted when they are no longer needed. A station in a controller may also have a few proxy points, typically in
cases where remote data are required within its control logic. However, proxy points are largely synonymous with a
Supervisor station.
Virtuals provide an attractive alternative to creating proxy points when engineering a
Supervisor station—especially for general Px page presentation. This feature dramatically reduces the general need for proxy points.