Practical SCADA for Industry David Bailey - FER-a

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Newnes An imprint of Elsevier Linacre House, Jordan Hill, Oxford OX2 8DP 200 Wheeler Road, Burlington, MA 01803 First published 2003 Copyright © 2003, IDC Technologies. All rights reserved No part of this publication may be reproduced in any material form (including photocopying or storing in any medium by electronic means and whether or not transiently or incidentally to some other use of this publication) without the written permission of the copyright holder except in accordance with the provisions of the Copyright, Designs and Patents Act 1988 or under the terms of a licence issued by the Copyright Licensing Agency Ltd, 90 Tottenham Court Road, London, England W1T 4LP. Applications for the copyright holder's written permission to reproduce any part of this publication should be addressed to the publisher British Library Cataloguing in Publication Data A catalogue record for this book is available from the British Library ISBN 07506 58053 For information on all Newnes publications, visit our website at www.newnespress.com Typeset and Edited by Vivek Mehra, Mumbai, India (vivekmehra@tatanova.com) Printed and bound in Great Britain
Contents Preface xiii 1 Background to SCADA 1 1.1 Introduction and brief history of SCADA 1 1.2 Fundamental principles of modern SCADA systems 2 1.3 SCADA hardware 4 1.4 SCADA software 5 1.5 Landlines for SCADA 6 1.6 SCADA and local area networks 7 1.7 Modem use in SCADA systems 7 1.8 Computer sites and troubleshooting 8 1.9 System implementation 9 2 SCADA systems, hardware and firmware 11 2.1 Introduction 11 2.2 Comparison of the terms SCADA, DCS, PLC and smart instrument 12 2.2.1 SCADA system 12 2.2.2 Distributed control system (DCS) 15 2.2.3 Programmable logic controller (PLC) 15 2.2.4 Smart instrument 16 2.2.5 Considerations and benefits of SCADA system 17 2.3 Remote terminal units 17 2.3.1 Control processor (or CPU) 19 2.3.2 Analog input modules 19 2.3.3 Typical analog input modules 26 2.3.4 Analog outputs 27 2.3.5 Digital inputs 28 2.3.6 Counter or accumulator digital inputs 29 2.3.7 Digital output module 31 2.3.8 Mixed analog and digital modules 33 2.3.9 Communication interfaces 33 2.3.10 Power supply module for RTU 33 2.3.11 RTU environmental enclosures 33 2.3.12 Testing and maintenance 34 2.3.13 Typical requirements for an RTU system 35 2.4 Application programs 36 2.5 PLCs used as RTUs 36 2.5.1 PLC software 37 2.5.2 Basic rules of ladder-logic 38 2.5.3 The different ladder-logic instructions 40 2.6 The master station 46 2.6.1 Master station software 48
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4.1 Introduction 4 Landlines Landli
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Figure 4.21 Telemetry installation
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5 Local area network systems 5.1 In
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7 Central site computer facilities
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9.1 Introduction 9 Specification of
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PIN NO 1 2 3 4 5 6 7 8 9 Appendix B
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Objective Appendix C CITECT practic
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Accumulator 29 counter specificatio
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COM port 7 Common mode rejection ra
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enclosure 213 power connections 214
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ead-only access 173 standard web br
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token ring 147 token-passing proces
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sinusoidal signal 193 technique 181
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multi-master mode 88 physical layer
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data communication system 6 disadva
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