Count when the analog signal changes

Hello there.

I have an analog signal to be used to calculate the average value. To do so, I need the counter which should do the increment by 1 when the analog signal changes every cycle. I did the algorithm to calculate the average value, but I am stuck with the increment with this counter when the signal cyclically changes. Please give advice.

Hello,

hope this can be trivial idea, you need compare Analog value with memory (use some Merker type) Analog signal from previous cycle. If they are different you can add Counter and memory new Analog value to Merker. You can also do your math f.ex. If they are same you do simply nothing, wait for next cycle and comparation for Analog value changes. Maybe next tip can be set some tolerance (range around) in that compare condition +/- to your Analog value. With this you can simply bypass some spikes on Analog values which you don't want add to your math f.ex. or you have simply reason to do that tolerance.

Hello,

not expected answer from you :) but here is some example:

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AI:=AIW(294); //save AI for better handling

IF (AI>(MEM_AI+5) OR AI<(MEM_AI-5)) THEN //change occured, also out of tolerance -> +/- 5

MEM_AI:=AI; //memory this new change for next cycle comparing

COUNT:=COUNT+1; //or HW Counter ADD

.... some your math

END_IF;

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Hope very little example/idea (your changes, other language conversion, improvements of code are needed of course) can help you.

Hello,

you're welcome...