Hi, I would like to ask where in openPDC I can see the arrival time of incoming measurements. I can see the measurement timestamp, but I want to know the actual arrival/received time at the openPDC side in order to estimate communication delay. Is this available anywhere in openPDC Manager, or would I need to use logs, historian timestamps, or custom code instead?
Hi frans,
The Measurement class has a property called CreatedTimestamp you can reference to determine arrival time, but it isn’t stored in any historian or displayed in any of the visualizations, as far as I know. To log the value of this property for offline analysis, you would need custom code.
That said, you can get a more rough “average” estimate of arrival time by looking at latency statistics for the input device. You can see these statistics in the openPDC Manager by navigating to Monitoring > Stream Statistics. You can also retrieve these statistics from the STAT historian archive using the Historian Trending Tool (HistorianView.exe).
Thanks,
Stephen