| Distributed Control Standard Connects Industry Regardless of Bus |
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| May 01 2007 | |
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The Hardware view shows the physical devices on the network, in 61499 mode. It also uses icons to indicate the devices that have an established 61499 relationship, as well as which 61499 diagram regulates the relationship. By double-clicking on the diagram reference, the user can have a look at the actual diagram. An IEC 61499 diagram greatly accelerates deploying applications across an industrial network made up of proprietary devices, switches, and controllers. The 61499 diagram supersedes the implementation of individual applications on individual devices. Traditionally, an application would be implemented on individual controllers in traditional automation, interacting with each other through manually implemented data transfers or interlocks.However, the IEC 61499 function block diagrams span over multiple devices (referred in the past as configurations or controllers) and, therefore, regulate the interaction between the various devices using a single functional diagram. By using the graphic network design environments such as the ISaGRAF 5 suite of automation tools, it is now possible to create control systems that define interactions among multiple devices. These could be PLCs, field controllers, or field instruments (flowmeter, valves, pumps etc.) with variable footprints, but all interacting in a well-defined and coherent fashion without the need for manually implemented algorithms on individual devices. With IEC 61499, the industrial control network is a seamless extension to the hardware bus on the controller, making the design of networked control systems as simple as the design of a singular PLC.This article was written by Julien Chouinard, Managing Director, at ICS Triplex ISaGRAF in Montreal, Canada. For more information, contact Mr. Chouinard at This e-mail address is being protected from spam bots, you need JavaScript enabled to view it , or visit http://info.hotims.com/10968-402. |
