Can anyone recommend a good and simple approach to retreive "only changed values" with datalink (compressed data or other function)? Since archive settings allow for a max time to be specified between archived values, it is possible to have multiple archive entries for a tag whose value hasn't changed. I would like to only retrieve the first occurance of each new value (see table below)..
A major competitor to OSIsoft provides an option to show only changed outputs with their "History Values" function in their excel add-in. See attached which shows the difference in output based on a single checkbox. I'm hoping for a similar approach with PI Datalink.