Hi Waza,

The difference between a Current value and an archive value is that they come from different places onthe PI server; current value is from the PI snapshot memory area, and the archive is from the PI archive file. Usually a point moves from the snapshot to the archive once it has passed the compression test (compdev or compdevprecent). This means that the current value can differ from the archive value even though the timestamp is set to '*'.

The difference is usually not worth worrying about as it's so small, but if the compression test is quite large (+/- 5% of the range of the tag) then it can squew your data especially if accuracy is really important.

Does this make sense?