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The task of building charts for I/O channel values comprises two steps:
| • | Enabling channel history storage (if historical values should be displayed on the trend) |
Enabling Channel History Storage
By default, any I/O channel in AggreGate SCADA/HMI doesn't store its historical values. To enable history storage using AggreGate Client:
| • | Right-click on a device account ( ) in the System Tree. |
| • | Select Edit Device Properties ( ). |
| • | Switch to Device Settings Synchronization Options ( ) tab and set necessary storage time for one or more properties: |
| • | Click OK to save the settings. |
For more information on the above settings, see Device Settings Synchronization Options.
Building Chart Widget
In AggreGate SCADA/HMI, any chart is widget component. See Charts section for comprehensive description of chart data model, properties, and use cases.
Creating a chart for displaying historical and real-time channel values is very simple:
| • | Right-click on a Device node () in the System Tree. |
| • | Select Configure Device ( ). The device settings (I/O channels) dialog will open. |
| • | Right-click on the I/O channel to create chart for, and select Create Chart. |
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Alternatively, it's possible to build chart widget from scratch by creating an empty widget, adding chart component to it, and setting up its properties.
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