The OPC XML DA standard builds on the widely used OPC Data Access standard but significantly simplifies the integration of automation systems and applications across the manufacturing enterprise by delivering multi-vendor interoperability and plug-and-play connectivity to plant floor information via the Internet. The OPC XML DA specification is based on Web Services and not anymore on COM/DCOM. Web Services are based on HTTP as transport layer as well as SOAP and XML.The OPC XML DA specification doesn't replace OPC COM, but is rather an extension of the present OPC specification, which allows you to have easy access to the OPC server also via the internet. Another advantage of the XML specification: also other operating systems (like Linux, Mac OS, PALM OS etc.) are now enabled to either access an OPC server or to allocate an OPC XML server (by the means of HTTP, XML and SOAP).
With the dOPC XGate Server it is possible to enlarge any OPC COM based server with an OPC XML DA interface .
No .NET Framework and no web server is required.
The dOPC XGate Server is based on the OPC XML DA specification 1.01 and is designed to work with existing OPC Data Access 1, 2 & 3 Servers.
But dOPC XGate also has other features like server protection or usage as a normal web server.
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