Retrieval modes

Different retrieval modes enable you to access data stored on an Historian in different ways. For example, if you retrieve data over a long trend duration, you can use equal length data collection intervals to minimize response time. For a shorter period, you might want to retrieve all stored values to produce more accurate trends.

Although Historian with a version of 9.0 or higher supports a variety of retrieval modes, the Trend Client only supports Cyclic and Full data retrieval.