Configure a trend to use a summary tag

Summary tags consist of summarized data of tags from a Historian server. A summary tag provides an aggregation calculation (minimum, maximum, average, or sum) that is configured on a Historian server. Summary tags are of two types: analog and state.

• Analog summary tags provide summary statistics for analog tags.

• State summary tags provide the summaries of the states of the tag value of analog (integer only), discrete, and string tags.

You can select one or more summary tags from the Tag Picker and drag them to the Tag List pane. When you drag a summary tag to the Tag List, the Trend application plots the value of the aggregate calculation on the Trend chart. The aggregate calculation is performed when you configure the summary tag on the Historian server. For example, if you have configured a ReactTemp_Avg_Hourly summary tag to store the hourly averages of the Reactor temperature, the Trend application shows the hourly average value of the Reactor temperature when you drag and drop the ReactTemp_Avg_Hourly tag to the Trend chart. For more information on the Tag List pane, see View tag definition information.

You can configure trend options for a summary tag. For more information, see Configure trend options for a tag.

For more information on retrieving summary tags, see Configure retrieval options for a tag or Configure retrieval options.