Introduction 0.1 Expectations from Automation 2 0.2 Basic Functions 2 0.3 Historical Development of Control Systems 3 0.3.1 Early Development 4 0.3.2 Pioneering Period 5 0.3.3 Direct Digital Control Period 5 0.3.4 Microcomputer Period 5 0.4 Current Trends in Computer Control of Process Plants 0.4.1 Centralised Computer Control System 7 0.4.2 Distributed Control Systems 7 0.4.3 Hierarchical Control Systems 9 0.4.4 Process Models 9 0.4.5 Advanced Control 9 0.5 Conclusions 11 Suggested Reading 13 Fundamentals of Automatic Process Control 1.1 Introduction 14 1.2 Process Definition 14 1.3 Open Loop Control 16 1.4 Closed Loop Control 17 1.5 Basic Principles of Single Controller Loop 1.6 Two-position Control 19 v 2, Phase IV, HSIDC, Kundli-131028, Sonepat, Haryana. Ghosh, PHI Learning Private Limited, M-97, Connaught Circus, New Delhi-110001 and Printed by Rajkamal Electric Press, Plot No. ISBN-978-8-0 The export rights of this book are vested solely with the publisher. No part of this book may be reproduced in any form, by mimeograph or any other means, without permission in writing from the publisher.
Krishna Kant Senior Director Department of Information Technology Ministry of Communications and Information Technology Government of IndiaĬOMPUTER-BASED INDUSTRIAL CONTROL, Second Edition Krishna Kant © 2010 by PHI Learning Private Limited, New Delhi. Computer-Based Industrial Control Second Edition