OPC Foundation Express Interface: More real-time, historial, alarm information
OPC Foundation added OPC Express Interface (Xi) to the OPC Foundation technology portfolio, the organization announced Nov. 16. OPC Xi is a new interface based on Microsoft .NET Windows Communication Foundation (WCF) technology. It is designed for secure reliable access to real-time, historical and alarm and event based information. The specification complements OPC UA and COM-based OPC Classic technologies.
The OPC Xi interface results from 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 was developed to provide a .NET-based migration path from OPC Classic. OPC Xi also may be used as a standard .NET WCF interface for newly developed OPC servers.
"The OPC Foundation Board of Directors has adopted Express Interface (OPC Xi) as a standard OPC interface. OPC Xi has been designed as a complementary interface that enables .NET clients and existing COM-based OPC Classic clients to access OPC Classic servers at the same time. OPC Xi also can be used as a standard OPC interface for newly developed .NET servers," says Thomas J. Burke, OPC Foundation president. He said the move was in response to feedback from members asking for a backwards compatible .NET interface for OPC Classic servers.
Products expected within a few months
In the next few months, OPC Xi products will be released, including toolkits, clients and servers, the organization said. OPC Foundation is based in Scottsdale, AZ.
– Edited by Mark T. Hoske, editor in chief, Control Engineering www.controleng.com