Store-and-forward mode

If the Historian shuts down or the network connection to it is lost while an application is running, historical data continues to be stored locally on the computer hosting the WinPlatform object. You define the folder to hold this "store-and-forward" data when you configure the historical data options for the WinPlatform.

When the Historian node recovers, data is forwarded from the local node to the Historian node at a low priority.

If an AppEngine loses connectivity to the Historian node, the Historian reports bad data quality to clients. When you undeploy an object with attributes configured for history, the Historian stores the final data points with Bad quality.