History read from a previous session.|OPC UA Implementation: Stacks, Tools, and Samples|Forum|OPC Foundation

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History read from a previous session.
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pascal
Metz- France
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06/14/2017
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06/14/2019 - 12:01
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Hello everyone,

I would like to retrieve the historical value of the node. I saw the function HistoryRead() on a session. It allows to read the value until the beginning of the session BUT how can do if I want to read values from a previous session ? 

Thanks a lot for your help

Pascal

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Randy Armstrong
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06/17/2019 - 08:58
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HistoryRead allows you to read any historical value that is persisted by the Server. If a particular server only supports history for an active Session then that is a limitation of the Server.

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