Skip to main content
InSource Solutions

TN Hist283 How to change the Interpolation type for all Integer tags in the Wonderware Historian.



This article from InSource walks through a process for changing the Interpolation Type for all integer tags in the Wonderware Historian.

  • Author: Joseph Hefner
  • Published: 11/21/2017
  • Applies to: Historian 10 and above.


By default, the Wonderware Historian returns all Integer values with the "Stairstep" Interpolation type. This tech note walks through the process for switching to "Linear".

Step 1)  Launch the System Management Console and navigate to the Configuration Editor \ System Configuration \ Parameters:





Step 2) Find the parameter InterpolationTypeInteger and double click on it:




Step 3)  Type in a value of 1 for Linear Interpolation and click "Apply" and then "OK".   If you wish to switch to stairstep Interpolation you would enter a value of 0 here.




Step 4) Right click on the Configuration Editor in the tree and choose "Commit Pending Changes":



Step 5) Click the Commit button: