There are 2 tags, P1.Number & P2.Variance. These 2 PI tags’ value will have the exactly time stamp:

The value of P1.Number will be digest number from #1 to #8.

The value of P1.Variance will be the variance between Actual & Target, from -10 to 20 (any number)

For instance:

7:10AM 7:33AM 8:10AM 10:43AM 1:56 PM 3:02PM 5:41PM 6:60PM

P1.Number 6 8 1 5 3 7 6 2

P1.Variance 12 -7 4 10 13 -3 9 -10

The chart I want is: The green line will be the value of P1.Variance. the value of P1.Number will display at the value of P1.Variance.

Is it possible that we can do it in ActiveX Trend, XY plots or SQC Chart? Thanks!

@Susan: Unfortunately, it is not possible to do this with the native functionalities of PI ProcessBook. I would see more about this from R software or Matlab.

Yes, it is possible to write-up your own ActiveX trend object but you will need a lot of hours to succeed. You will also need to use VB6/VC++ ATL. I have heard some customers had a lot of success with Silverlight embedded controls within PI ProcessBook.

I hope that this helps you!