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Location: Blogs Sreejumon's Industrial World |
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| Posted by: Sreejumon |
Sunday, April 01, 2007 |
OPC Unified Architecture (UA), the most recent OPC specification from OPC Foundation, replaces the protocols of its predecessors. OPC stands for OLE for Process Communication, but I would call it as Open Protocols for Connectivity. Hope you will agree with my new definition for OPC (Open Protocols for Connectivity) :)
OLE/DCOM based process communication is going to be part of the history. OPC UA supports two protocols, binary and Web service (SOAP).
Binary protocol can be accessed via TCP port (4840) and URL(tcp://ServerName). It is best suited for embedded devices and it takes only minimum resources since no XML, HTTP, SOAP stuffs required for binary stack implementation. Binary protocol offers best performance with least overhead.
Web Service / SOAP based protocol is firewall friendly and it will work on http (port 80) and https (port 443). It offers better interoperability with latest tools and technology (.NET and Java)
OPC UA specifications and SDK (.NET) can be downloaded from OPCF web site
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