Work with retrieval styles

Retrieval styles cover the following retrieval options:

• Retrieval mode

• Resolution for cycle-based modes (as time duration or number of pixels per cycle)

• Data retrieval source (history or summary tables)

• Moving average calculation

• State calculation for ValueState retrieval

If you want to use additional retrieval options, such as deadbands, row limits or a quality rule, you must specify them in the Trend application at the application and/or tag level. For more information, see Configuring Retrieval Options and Configuring Trend Options for a Tag.

You can use retrieval styles at the application and/or tag level. When you specify a retrieval style at the application level, that style is used for all tags that do not have a different style specified.

The Trend application comes with various predefined styles that you can use. For a description of each style, see Using the Standard Retrieval Styles. Alternatively, you can define your own retrieval styles to suit your needs. For more information, see Location and Structure of Retrieval Styles and Creating and Editing Retrieval Styles.