Regarding the trend issues of the deltatav system
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In the AI module, there are sometimes more than one parameter whose trends need to be viewed. By clicking on the historical trends option in the AI panel, only the historical trend of one parameter, namely PV, can be seen. I would like to ask everyone how it is possible to display all the trend points from this module when clicking on historical trends in the AI panel
When configuring historical trends, in addition to selecting PV, select the other required parameters as well
I checked it; take a look at whether the steps below will work: To start the Process History View: 1. Click Start | DeltaV | Operator | Process History View. 2. Click E + Chart in the new dialog box. 3. Click the Add button, then click the Browse button in the Parameter Reference Entry dialog box. 4. Select Module Parameters in the Object Type field and navigate to XXXX/PV.CV to plot its value. 5. Click OK in the Parameter Reference Entry dialog box. 6. A graph will appear, showing the trends of the parameter values over time as well as the related events. 7. The Process History View application offers numerous graph configuration options and event filtering options, which are described in the Online Help. 8. Tip: Click Trend | Plot Method to change the line style. 9. Close the Process History View application. You can find more information on this topic in Books online.
What was mentioned upstairs seems to refer to observing the trend of instantaneous values; to view the historical trend, configuration is necessary