Configure predictive data retrieval

You can define a predictive data retrieval option in the Historian Client. Predictive retrieval means the Historian Client will interpolate future data trend based on the existing data received.

For example, suppose you were using the Historian Client to view a trend for a tank level at your plant. With the data already stored, you can see the tank level values since operations started this morning, but now you would like to know what the value is likely to be in an hour.

Note: Predictive retrieval is supported for the best-fit, full, and delta retrieval modes. If this option is applied to other retrieval modes, it is ignored.

By using the Pan Right (">>") toolbar button, you can advance the trend and, with the Historian Client’s new predictive data retrieval feature, you can see a prediction for that future value based on current data. Historian Client interpolates the trend based on the last value was received.

Note: When you save the trend to a CSV file, you can also see predictive data in an Excel Workbook. See Save trend data to a .CSV file for more information.

Using the Transformation Option at application level

1. From the Tools menu, click Options.

2. In the Options dialog box, click the Other tab.

3. From the Transformation dropdown, choose Extrapolate using linear regression.

Using the Transformation Option at tag level

4. From the Trend Tag List grid, double-click a tag.

   The Tag Properties for that tag display.

5. From the Retrieval tab, click the Other tab.

6. From the Transformation dropdown, choose Extrapolate using linear regression.