Explore retrieval modes

Different retrieval modes allow you to access the data stored in an AVEVA Historian in different ways. For example, if you retrieve data for a long time period, you might want to retrieve only a few hundred evenly spaced data points to minimize response time. For a shorter time period, you might want to retrieve all values that are stored on the server to get more accurate results.

An AVEVA Historian with a version earlier than 9.0 supports two retrieval modes:

• Cyclic retrieval

• Delta retrieval

An AVEVA Historian with a version of 9.0 or higher supports various additional modes:

• Full retrieval

• Interpolated retrieval

• Best fit retrieval

• Average retrieval

• Minimum retrieval

• Maximum retrieval

• Integral retrieval

• Slope retrieval

• Counter retrieval

• ValueState retrieval

An AVEVA Historian with a version of 10.0 or higher supports the following additional mode:

• RoundTrip retrieval

An AVEVA Historian version 11.6.14101 or higher supports the following additional mode:

• Predictive Retrieval

An AVEVA Historian with a version of 17.3.100 or higher supports the following additional mode:

• Bounding Value Retrieval