Getting an average of a fast changing analogue signal with a Com'X 200/210

[sesa236671]

I'm trying to figure out how best to read the 15min average of a fast changing analogue input with a Com'X 200/210.

I have a 4-20mA signal that changes quickly (it could vary many times a minute), but I only want to read it every 15min. As far as I know, I can only sample the instantaneous value of that signal with the Com'X -- but what I actually want is the average value of that signal over the sampling interval. I need something that will calculate for me the "sliding window" average of the last 15mins.

Any suggestions? Has anyone had to do something like this before?

I could use a small PLC, but I want to keep it simple and not have any programming or complex configuration to support (this will be used many times over in many sites).

[JamesJeanette]

Hi Mike.

So, maybe one option...you could schedule the "Environment" Data Logging parameter to log the temperature every minute.  You could then publish the logged data as a .csv file.  Once in Excel, you could take the average (perhaps use a macro).  In the current version of the Com'X, you would only be able to publish every 1 hour at the fastest.

I would also imagine a custom web page to do this inside the Com'X 510 once we add "Custom Web Page" support (~ end of Q1 2016).

Others?