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Discrepancy between max running average and max


Makada Oct 4, 2020 11:48 AM

Hi,

I would like to know what i am doing wrong in the following:

I have a mainscan of 1sec.

I have a subscan of 250 ms. 

I have a 1 minute table where this data is stored.

Within the subscan i have the voltdiff windspeed.

In the subscan i have a running average of 4 samples (4×250ms) windspeed.

So far, so good.

In the minute table i have a max windspeed and a max running average windspeed both from the subscan data.

Now comes to strange thing:

Sometimes the max running average windspeed is higher then the max windspeed....

I dont think that is logical. 

I noticed the update rate of the one second data is very wonky,  sometimes updating twice a second...


Makada Oct 4, 2020 01:00 PM

Ah i think i made an error...

I used: subscan(250,msec,4)

...i think i have to use: subscan(0,msec, 4)

Am i right?

Update:

I tried, no difference.


Makada Oct 4, 2020 03:34 PM

With a subscan(250,msec,4), how to have a running average of 3 seconds?

Avgrun(WS_KPH_AVG,1,WS_KPH,12)

Or

Avgrun(WS_KPH_AVG,1,WS_KPH,3)

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