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XML-BASED EVENT DRIVEN INTERFACE FOR OPC DATA ACCESS
XML-BASED EVENT DRIVEN INTERFACE FOR OPC DATA ACCESS
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机译:OPC数据访问的基于XML的事件驱动接口
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摘要
Communication from applications may be carried in XML-based events through sockets, Web services, JMS, HTTP, telnet channels, and the like to an OPC client. The OPC client may include an event engine configured to process the XML-based events, and convert them to appropriate COM/DCOM API invocations. In some embodiments, the OPC client buffers collected data from the COM/DCOM API, and transmits the buffered data in an XML event to an application based on a subscription time schedule and/or value condition. The OPC client allows service oriented event-driven applications to interact with industry devices remotely via the open architecture provided by the OPC specification using a business level language syntax.
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