Analog Input Average or Sampling Interval

[Nancygogogo 1]

Hi everyone, 

I am working on the AB MicroLogix ML1100, I have a question about the analog input. Right now I am able to read the analog input from the pressure transmitter (0-10V), however, the number is too jumpy... I would like to read either average for such as every 2 seconds or slow down the sampling interval which the function could give me a stable output. But I am not sure which function and how should I use them. Please advice.

Hope if there's anyone could help me on this, thank you so much.

Edited 5 Feb 2018 by Nancygogogo

[Mickey 71]

Why is it "jumpy", noise? You might want to explore that first.

You could use a filter, see txt below.

Filtering.txt

Edited 5 Feb 2018 by Mickey

[Nancygogogo 1]

1 minute ago, Mickey said:

Why is it "jumpy", noise. You might want to explore that first.

You could use a filter, see txt below.

Filtering.txt

Hi Mickey, Thank you for your reply.

So ideally I think the output number should smoothly go up, but the result I got from the pressure transmitter (when I am filling the water) is  10, 11, 15, 30, 16, 18, 40, 19, 20...etc. it will jump to a large number then back to the normal number... 

Also, I read the file you send to me, I was wondering how should I achieve this equation, should I use the Math function?

And I saw there is a PID function, is this function necessary to be used for my problem? I am new to the PLC, please advice, thank you so much for your help.

 

[Jeff E&I 0]

Not 100% sure of your application but I have had similar issues and resolved them by bleeding air out of the lines.  Worth doing if you have not tried that.

[Mickey 71]

Quote

Also, I read the file you send to me, I was wondering how should I achieve this equation, should I use the Math function?

Yes

"SUB"

"MUL"

"ADD"

should do it, play with the constant until you get what you want.

 

Quote

And I saw there is a PID function, is this function necessary to be used for my problem

No, this instruction is for control.