The TwinCAT OPC server is a standardized data exchange interface. It supports the DataAccess (DA) and XML-DA specifications. DataAccess (DA) is based on the Microsoft COM technology and provides data for the client. The OPC XML-DA specification enables data exchange through XML via HTTP. Configuration of the server is carried out in a configuration tool or via XML. The CE version is for using the TwinCAT OPC Server for accessing variables, according to OPC-DA/OPC-XML-DA specification for Windows CE platforms
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