Would it be possible to recover data following a connection disruption?
There should be some buffering configured, how long was the disruption?
We will need some additional information to help you. Was the connection disruption between the Data Source and PI Interface? or between the PI Interface and the PI Data Archive? What is the setup in your case?
What is the data source that is writing data to the PI Data Archive? Certain interfaces/data sources support history recovery, I would check the user guide for whatever application you are using to see if history recovery is supported.
As Brendan John mentioned, if the disconnection was between the PI Interface and the PI Data Archive, we would definitely recommend configuring buffering for the interface via PI Buffer Subsystem. Whenever the buffer loses connection to the PI Data Archive, the buffer would temporarily hold the collected data until connection was restored, in which case, the events would flush out of the buffer to the archive.
The duration of disruption is 3 days, the trend takes only the value where the disturbance started until the taking back of the connection. Adam Fink, the connection disruption is between the Data Source and PI Interface.
In that case, whether or not you are able to recover the data will be entirely dependent on if the data source still has the historical data available, and whether or not the interface supports history recovery. Common interfaces that typically support history recovery are PItoPI, OPC HDA, RDBMS, etc. What is the data source and PI Interface in question?
Retrieving data ...