Jump to content

Filtering on input channels


LPK

Recommended Posts

Hi all,

 

I see it says about the filtering/smoothing/averaging on input channels that there are options that give you no averging, 3-reading, 5-reading or 7-reading averages on input channels, but I was just trying to work out over what kind of timespan this would occur?

 

Do the channels get sampled once every ladder cycle, so the moving average timespan might be (up to) 7 ladder cycles in duration, or would the ladder rungs all be executed and then the inputs sampled (up to) 7 times in succession, making the time span only one ladder cycle? Or do the input channels get sampled on some other kind of demand system?

 

Thank you in advance for clearing this up!

Link to comment
Share on other sites

Hi LPK,

As for all PLC's the input channels are being sampled once per scan (at the beginning of the cycle).

The smoothing feature does not change the system's behavior in any way. all it does is presenting an average value of the input. Consequently, the update frequency for these values will vary according to the smoothing selection.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...