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033008 - Needs clarification on the MovingAverage (12-5 sec) retreival style

Problem

Needs clarification on the MovingAverage (12-5 sec) retreival style. Which 12 values are used in calculating the average? The customer has stated that he is using delta storage and he would like some clarification on how the average value is being calculated.

Product Version: 9.2

OS: Win 2003

OS_SP: SP2

Solution

The Moving average is calculated as the average of the last number of values with the specified resolution. For instance, if you area using the MovingAverage (12-5 sec) you will get the average of the last 12 (delta) values stored in the historian every 5 seconds. This will cause the same values to be used when there has been no change of the value within the 5 second period.

Close Date: 2010-04-16 12:37:50