About adding Virtual Points

For any virtual point with a history in a remote station that is displayed in a Web Chart on the local Supervisor station, the history data is included in the chart.

In Niagara 4.2 and later, you can add individual virtual points (via dragging from the Virtual space or some other means) to a web chart on the Supervisor. If the remote point on the controller has a history, then the chart attempts to resolve the history on the Supervisor and use it to initialize the web chart.

NOTE: In order to detect the matching history, the history must be already imported or exported from the controller to the Supervisor.

Figure 10. Adding virtual points to a web chart on Supervisor

By default, the Supervisor pulls across only the n:history tag information. However, you can enable Persist Virtual Fetched Tags property (used in conjunction with the existing Tags To Fetch property) on the NiagaraNetwork component in order to add tags as slots on the virtual components.

About adding Virtual Points

Figure 10. Adding virtual points to a web chart on Supervisor

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