The short question is: Where is the stored timestamp for a specific pi point generated?
A bit more explained, given an example.
PI system consists of Equipment/Sensor --> SCADA --> Interface --> PI Server/DA
The sensors measured data points are stored ass time series data in DA.
In this case, from where does the actual stored timestamp origin?
- Does the SCADA provide timestamp, sends the measured value with timestamp to interface and interface just transfers it to DA?
- Does the Interface receive the datapoint and somewhat appends the timestamp before sending to DA?
- Does DA receive the measured data, and append the timestamp when storing the data?
- Could it be a configurable combination of all of the above?
A not too scientific answer would be appreciated, if possible, as will have to translate explanaition to non-PI personnell