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OPC UA General errors description
April 26, 2022
15:17, EEST
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SpasBelev
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Hello, wanted to ask if there is a documentation describing the errors being raised bi the OPC UA Client like thresholds, different reasons etc.

April 26, 2022
15:44, EEST
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Matti Siponen
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Hello,

Prosys OPC Client is not an OPC UA Client. What do you mean when you say “the OPC UA Client”? Do you mean OPC UA Clients in general or some specific OPC UA Client?

What do you mean with errors? Do you mean Bad StatusCodes? Some of them are listed in https://reference.opcfoundation.org/Core/docs/Part4/7.39.2/ but more StatusCodes are defined in latter parts of the OPC UA Specification. If you mean something else with errors, please clarify what you mean.

April 26, 2022
19:24, EEST
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SpasBelev
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Hello, thank you for the response. I mean for https://www.prosysopc.com/products/opc-ua-java-sdk/technical-details/ which we use for development. I want to understand, if possible, when and why(what are the conditions) the Bad_StatusCodes are generated and what they mean which might help us when facing problems.

April 27, 2022
8:15, EEST
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Matti Siponen
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Hello,

The OPC UA Specification (available online at https://reference.opcfoundation.org/) defines how StatusCodes are supposed to be used in Client-Server communication consisting of Service requests and responses. Part 4 (https://reference.opcfoundation.org/Core/docs/Part4/) in specific defines the Services that Servers provide to Clients and which StatusCodes Servers should be using when there are errors. Some specialized parts of the Specification such as Data Access (https://reference.opcfoundation.org/Core/docs/Part8/) and Alarms & Conditions (https://reference.opcfoundation.org/Core/docs/Part9/) also define additional StatusCodes and how to use them.

There are currently over 200 StatusCodes in the Specification (https://github.com/OPCFoundation/UA-Nodeset/blob/v1.04/Schema/StatusCode.csv). To understand how StatusCodes are used, you will need to read Part 4 for the StatusCodes used in common Client-Server communication and other parts that are relavant to your Client application, e.g. if your Client supports Historical Access, you will need to read Part 11 (https://reference.opcfoundation.org/Core/docs/Part11/) for StatusCodes related to reading historical data and so on.

P.S.
This section of the forum is for discussion related to Prosys OPC Client application. The correct place for this topic would’ve been the OPC UA SDK for Java section.

April 27, 2022
10:14, EEST
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SpasBelev
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Hello, thank you, I will check the provided references. Apologies but new to the forum and was not sure in which section.

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