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Product and Service Requests
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OPC Marketplace
Help, questions and suggestions related to the OPC Marketplace website.
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OPC UA Standard
Questions about OPC UA technology and specifications etc.
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Last Post Mohit Agarwal - Query on ContentFilter usage for Complex Filter with Array of Simple Structure - 03/20/2023


OPC UA Companion Standards
Questions about OPC UA companion specifications
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Last Post Wolfgang Mahnke - Multiple domain modeling (e.g. PackML, IAS95, AAS, OpenPLC) - 02/13/2023


OPC UA Implementation: Stacks, Tools, and Samples
Questions about OPC UA sample applications, source code, and utilitites, etc.
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Last Post Rudolf Pribis - Does the TranslateBrowsePath operate only at first level of the reference? It is possible to achieve // like in xpath? - 03/27/2023


OPC Certification and Interoperability Testing
Questions about OPC Certification and Interoperability testing etc.
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Last Post Phuong Nguyen - How is statement "This error may be suppressed" in Certificate Validation Steps evaluated in CTT - 10/12/2022


Classic OPC: DA, A&E, HDA, XML-DA, etc.
Questions about OPC Classic technologies and specifications, etc.
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Last Post jian xin - OPCDAAuto.dll OPCGroup dataChange not work invoke after work a period time - 03/30/2023

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