Get Distributed control applications : guidelines, design PDF

By Alois Zoitl, Thomas Strasser

ISBN-10: 1271271281

ISBN-13: 9781271271283

ISBN-10: 1482259060

ISBN-13: 9781482259063

Distributed keep watch over functions: directions, layout styles, and alertness Examples with the IEC 61499 discusses the IEC 61499 reference structure for allotted and reconfigurable keep watch over and its adoption via undefined. The ebook presents layout styles, program instructions, and principles for designing allotted keep an eye on purposes in keeping with the IEC 61499 reference version. furthermore, examples from a variety of commercial domain names and laboratory environments are brought and explored.

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Extra info for Distributed control applications : guidelines, design patterns, and application examples with the IEC 61499

Sample text

A typical application example is a variable used as a loop counter. • Network and Segment Types: The usage of different segment types in the system model was not possible in the original specification of IEC 61499. Since various fieldbus and industrial ethernet solutions exist, their use in the system model is preferable. This issue has been addressed in the new edition, providing the possibility to specify the properties of a network type and its corresponding protocol(s). This allows a clear documentation of the overall system structure of a distributed IPMCS.

Into the IEC 61499 reference model. In the following sections the essential concepts and modeling elements which are mainly covered by Part 1 of the standard are described. 3 Event-Based Execution Model The execution model of IEC 61499 defines FBs characterized by two different input/output (I/O) types: events and data. 1). Only if an event occurs at an FB input, the execution environment has to process the execution of this FB. Hence, it is obvious whether an application is active and exactly which part is currently processed.

As a result, in 2012 the second edition of IEC 61499 was published including several changes made in response to approximately 120 editorial and 40 technical comments received from national committees, with additional editorial changes to conform with IEC requirements. The most important and significant technical changes compared to the first edition are listed below [2, 4]: • Execution Control: The execution model of FBs—especially the ECC—was one of the most discussed issues of the IEC 61499 specification in industry and academia since its publication.

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Distributed control applications : guidelines, design patterns, and application examples with the IEC 61499 by Alois Zoitl, Thomas Strasser


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