Configure dynamic time range calculations

Use a PI AF attribute to calculate the time range based on variable factors. You can use the attribute value to determine the time range dynamically. The attribute values must be valid PI relative times, as described in Understand relative time.

1. Configure an attribute to generate the PI relative times. The attribute might reference an enumeration set containing PI relative times, or it might construct PI relative times based on a calculation.

2. Configure the PI point data reference.

   1. From the By Time list, select Time Range Override.

   2. In the Relative Time field, type: %@AttributeName%

   where AttributeName is the name of the attribute that generates the PI relative time values.

   1. From the By Time Range list, select a calculation method.

With this configuration, the data reference uses the calculated relative time as a time offset that determines the time range.

See Practice exercise: Create an example variable end time to step through an example.