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Classic OPC: DA, A&E, HDA, XML-DA, etc.

Questions about OPC Classic technologies and specifications, etc.

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Log4J exploit and OPC Core Components

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Randy Armstrong - 12/13/2021 - 15:44

Replies: 0

Views: 1605

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Randy Armstrong - 3 years ago

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ECCN Numbers for OPC Classic Downloads

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Randy Armstrong - 05/09/2019 - 09:07

Replies: 0

Views: 2177

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Randy Armstrong - 5 years ago

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AE Refresh behaviour

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Siyuan Xu - 09/20/2024 - 01:24

Replies: 1

Views: 41

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Randy Armstrong - 1 month ago

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How to differentiate between branch and leaf with identical names when a client calls to getitemid() (OPC DA)

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Zohar Tsioni - 09/15/2024 - 23:26

Replies: 1

Views: 46

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Randy Armstrong - 1 month ago

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.NET API OPC DA Client sometimes fails to Read() and GetProperties()

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Siyuan Xu - 06/27/2024 - 04:04

Replies: 2

Views: 170

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Siyuan Xu - 4 months ago

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Multiple DataChange events with no Changed Data

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andrwe Borne - 05/01/2024 - 08:53

Replies: 3

Views: 172

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Randy Armstrong - 5 months ago

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Issue uninstalling OPC Core Components Redistributable (x64) 3.00.108.msi

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Gianluca Mazzimini - 04/30/2024 - 02:35

Replies: 1

Views: 270

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Randy Armstrong - 6 months ago

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server.IsConnected inaccurately reports status

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Siyuan Xu - 04/15/2024 - 04:17

Replies: 3

Views: 153

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Randy Armstrong - 6 months ago

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Exception: RPC Server is Unavailable with DataChanged Handler

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LeeN - 04/11/2024 - 22:24

Replies: 1

Views: 218

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Randy Armstrong - 6 months ago

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Current plan for OPC Foundation's .NET API?

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Siyuan Xu - 04/08/2024 - 00:42

Replies: 2

Views: 244

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Siyuan Xu - 6 months ago

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API reference documentation for .Net libraries for Classic OPC

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John Yesberg - 03/06/2024 - 19:39

Replies: 1

Views: 327

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Randy Armstrong - 7 months ago

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Remote connection failure

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Dustin VanKeuren_2 - 02/29/2024 - 07:38

Replies: 4

Views: 398

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Dustin VanKeuren_2 - 8 months ago

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