Getting whole average value of pump speed

danishnaseem.pg · Jul 31, 2013

Hi,

I am working over controllogix platform, i need to get the pump average % speed of whole day, kindly help me out here,

regards,
Danish

RussB · Jul 31, 2013

Take a reading every 5 minutes and add it to the previous one, at the end of the day you should have 288 readings. Divide your total by 288 to get the average. If you need to be more accurate, take more readings and divide the total by the number of samples taken.

danishnaseem.pg · Jul 31, 2013

Which means i need to add the 288 array?? i do not understand from add it to the previous one, can please brief about it, thanks for your reply

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nonuke · Jul 31, 2013

What Russ is saying, is that at the end of the day you have taken 288 readings but ONLY have one total because you add the last value to the previous total value.

danishnaseem.pg · Jul 31, 2013

O i got your point

thanks a lot

Tom Jenkins · Jul 31, 2013

If you don't want to loose it if the controller drops out during the day you could take a running average. Use a counter to keep track of how many readings you've taken, and keep track of the running average. The new average is the old average times the previous number of samples plus the new value all divided by the new number of samples:

Ave = ((Ave_at_n-1 x (n-1))+ NewValue)/n

danishnaseem.pg · Aug 3, 2013

Thanks TOM this exactly i am going to do

Getting whole average value of pump speed

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