Programmable Logic Controller
Source: Programmable Logic Controller, Book edited by: Luiz Affonso Guedes,
ISBN 978-953-7619-63-3, pp. 170, January 2010, INTECH, Croatia, downloaded from SCIYO.COM
Programmable Logic Controller
Edited by
Luiz Affonso Guedes
Intech
Published by Intech
Intech
Olajnica 19/2, 32000 Vukovar, Croatia
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First published January 2010
Printed in India
Technical Editor: Teodora Smiljanic
Cover designed by Dino Smrekar
Programmable Logic Controller, Edited by Luiz Affonso Guedes
p. cm.
ISBN 978-953-7619-63-3
Preface
Despite the great technological advancement experienced in recent years,
Programmable Logic Controllers (PLC) are still used in many applications from the real
world and still play a central role in infrastructure of industrial automation. PLC operate in
the factory-floor level and are responsible typically for implementing logical control,
regulatory control strategies, such as PID and fuzzy-based algorithms, and safety logics.
Usually PLC are interconnected with the supervision level through communication
network, such as Ethernet networks, in order to work in an integrated form.
The first PLC were computers designed to specific proposal that worked with simple
digital inputs and outputs, and their programming language were based on relay logic.
Currently there is a wide range of PLC manufacturers that offers products to automate from
domestic activities up to large scale industrial processes. Thus, there is a PLC for each type and
class of application. The most powerful PLC are equipped with sophisticated hardware and
software infrastructure. But the small PLC have configuration software with good features too.
Due to modern integrated automation concept, all components of the automation
system must work interconnected through communication network and must be dotted of
agile reconfiguration capability. Because PLC are the main equipments in several current
automation solutions, there are a strong demand for standardized methodologies,
technologies and software-based solutions to aid the various activities of the PLC programs
development, such as modeling, validation, verification, test and automatic code generation.
Other current demand is related with the difficulty in obtaining examples from the real
world in order to explain how hard it is to develop application to PLC.
In this context, this book was written by professionals that work and research in
automation area and it has two major objectives. The first objective is present some advances
in methodologies and techniques for development of industrial programs based on PLC.
The second objective is present some PLC-based real applications from various areas such as
manufacturing system, robotics, power system, communication system, and education.
The book is organized in 10 chapters, where the first four are concerned with
methodologies and techniques to develop PLC programs and the last six are PLC-based
applications from the real world. We expect that the readers have basic knowledge of
VI
industrial automation and PLC programming. On the one hand, since this book presents
some recent advances in methodologies and techniques to help the development of PLC
programs, we believe that it is useful for engineers, practitioners, graduate students and
researchers who are related in the automation area. On the other hand, the chapters of
applications can be especially useful for undergraduate student and engineers from several
areas, such as computer, communication, electrical and mechanic engineering.
Editor
Luiz Affonso Guedes
Federal University of Rio Grande do Norte,
Brazil
Contents
Preface
1. Object-Oriented Modeling, Simulation and Automatic Generation
of PLC Ladder Logic
V
001
Kwan Hee Han
2. Practice of Industrial Control Logic Programming
using Library Components
017
Oscar Ljungkrantz, Knut Åkesson and Martin Fabian
3. Control and Plant Modeling for Manufacturing Systems
using Basic Statecharts
033
Raimundo Moura and Luiz Affonso Guedes
4. The Java based Programmable Logic Controller. New Techniques
in Control and Supervision of a Flexible Manufacturing Cell.
051
Ramón Piedrafita and José Luis Villarroel
5. Holonic Robot Control for Job Shop Assembly by Dynamic Simulation
071
Theodor Borangiu, Silviu Raileanu, Andrei Rosu and Mihai Parlea
6. Centralized/Decentralized Fault Diagnosis of Event-Driven Systems
based on Probabilistic Inference
099
Shinkichi Inagaki and Tatsuya Suzuki
7. New Applications Using PLCs in Access Networks
Lamartine V. de Souza, João C. W. A. Costa and Carlos R. L. Francês
121
VIII
8. Development of Customized Distribution Automation System (DAS)
for Secure Fault Isolation in Low Voltage Distribution System
131
M. M. Ahmed, W.L. Soo, M. A. M. Hanafiah and M. R. A. Ghani
9. Computer Emulations to Support Training in Automation
151
Manuel E. Macías and Ernesto D. Guridi
10. PLC based Structure for Management and Control
of Distributed Energy Production Units
Joao M. G. Figueiredo
161