Configure value retrieval by time

A client application request for an attribute value includes a time. Specify how to interpret that time to retrieve values for the attribute.

1. Select an option from the By Time list. The default option is Automatic. For more information, see List of time retrieval options.

2. Optional. If an attribute is configured to return the value at a specific time, you can configure a time delay from the time requested. This can be useful when you are creating dead-time delayed attributes.

   In the Relative Time field, type the relative time of the delay. Use a PI relative time expression, as described in Understand relative time.

   Note: You can also use substitution parameters to read the relative time from the value of another attribute, as described in References to attribute values.

3. Select an option from the By Time Range list. The default option is End Time. For more information, see List of range retrieval options.

4. Click OK.