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OPC
Express Interface (Xi)
OPC Xi is the newest technology added to the
OPC Foundation technology portfolio
complementing OPC Unified Architecture (UA) and
COM-based OPC Classic technologies.
The OPC Xi interface is the result of
collaboration among several OPC vendor companies
from the process industry to develop an easily
integrated and secure solution for a variety of
plant communications. OPC Xi's
primary objective was to provide a .NET-based
migration path from OPC Classic.
Additionally, OPC Xi may be used as a standard .NET WCF interface for
newly developed OPC servers.
Key features of OPC Xi:
- Security – secure communications
including access through firewalls
- Simplicity - make servers and clients
easy to implement, configure and deploy
- Robustness – reliable communications
with error recovery
- Plug-and-Play – automatic discovery
of servers and their communications
capabilities
- Backward compatibility - accessing OPC DA, AE and HDA servers using a single
.NET interface
- Protocol transparency
– efficient client/server communications
when both the client and server are on the
same platform or within the same
LAN and
when the client is located on external
networks including the Internet (see Figure
below)
OPC Xi Downloads.
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