RSLogix 5000 Deviation from target

[TJNieling]

Is there a way to get a deviation from target in RSLogix 5000? Currently I am writing the target value to the array used for the MSTD in function block or STD in ladder logic but that throws my array average off. Any ideas??
Thanks
Tom

http://www.nieling.com

 

[baref00t25]

I think you are looking at two very different items. Possibly you want to do a standard deviation of the difference between target and actual?

 

[TJNieling]

You mean doing just the 2, instead of a moving deviation. Then I could do a moving average of them??
That is a possabillity.
Thanks,
Tom

 

[baref00t25]

Do a moving deviation of the difference between setpoint and target and then you could have a seperate array of the actual that you could do averages on.

 

[TJNieling]

Yes, I follow you, I will give it a try.
Thanks