Scaling Problem

[tigershark]

Hi, 

I have Volt and Amp data from different IEDs via Modbus TCP and IEC 61850. My problem is:


- I need Amp (current) scaling factor to be adjustable by user input in runtime.
  There should be some code which will pop-up input screen on pressing "Settings" button and ask user to enter CT scaling ratio and scale the variable accordingly.


I have tried by using the VBA script :


Dim ctRatio As Integer

thisProeject.Variables.Item("Current L1 Node 1").RangeMax = ctRatio

And taking "ctRatio" as user input....

But it doesn't work. However when i am in Workspace and put the "RangeMax" property of that variable to the desired scaling ratio, It does scale it well.
But I need "adjustable scaling factor" that the runtime should ask from the user and adjust the variable accordingly.


Please Help ..!!!


And many thanks.... 

[mst]

I think this is not possible this way. You cannot change the Scaling Range via RangeMin/Max during Runtime.
But you can use nonlinear value adjusting with VBA and there you can use another Variable to scale.

[tigershark]

Thanks! I did it using Non linear value adjustment using VBA macro...