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[KB405]10 Minute Statistics Project

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14 years ago
By RM
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Applies to:

PcVue version 8.2 SP1.
In general if a project is used with a later version of PcVue it will be automatically converted to that version. Occasionally it may be necessary to make manual modifications.
Summary:

This project samples the value of selected database variables every 5 seconds and, every 10 minutes, calculates the Minimum, Maximum, Mean and Standard Deviation. This is a common requirement of Wind Farm applications.

The names of the variables that are to be sampled are entered in an ASCII file that is read at startup. Each Standard Deviation calculation requires approximately 360 mathematical operations. (Mainly addition, subtraction and multiplication) To calculate the standard deviation of the 200 variables in the project it takes about 20 seconds. All programming is in SCADA basic.
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Sample project:

Created on: 11 Feb 2011 Last update: 13 May 2024