Introduction
The process data or the logging data of the plant objects are displayed graphically in a trend control in runtime.
You switch between the following display modes in runtime:
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Device view and plant hierarchy
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Online values and log values
Requirement
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The plant hierarchy has been created and assigned to a device.
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A trend control is configured in the screen by the assigned device.
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The "Select data connection" button is displayed in the control.
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The "Select context" button is displayed in the control.
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Runtime is active.
Display process data of the plant objects
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Click "Select data connection" in the trend control.
A "Selection of logs/tags" dialog opens.
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To open the list of available tags, click "Tag".
The "Browser view" dialog opens.
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To jump to the plant view dialog, click on the "CPM" icon in the toolbar.
The plant objects and the available data members for the plant objects are displayed.
Note
If you have assigned a descriptive display name for the trend when you configured the trend control, only the display name is shown in runtime. All plant objects are visible at a glance in the selection list.
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Select the respective plant object whose process data you want to display in the trend control.
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Select the data members that you want to display as trend in the trend control.
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Confirm with "OK".
The process values for the selected plant object are displayed in the trend control.
Display context data of the plant objects in a trend control
For analysis purposes, display the value range of the resulting data using the context data.
The evaluation is relevant, for example, in connection with WinCC Unified Performance Insight to analyze the effectiveness or the fault rate of the plant.
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In the trend control, click "Select context".
The "Trend context" dialog opens.
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In the "Plant objects" selection list, select the respective plant object whose data you want to display in the trend control.
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In the "Context" selection list, select the data assigned to the plant object.
The list of the data appears under "Logged context values".
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Select the value that you want to display.
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Confirm with "OK".
The trend control displays the trends for the selected data.