# Programmable Logic Controllers / Edition 3

ISBN-10: 0750659866

ISBN-13: 9780750659864

Pub. Date: 07/15/2003

Publisher: Elsevier Science & Technology Books

This is the introduction to PLCs for which baffled students, technicians and managers have been waiting. In this straightforward, easy-to-read guide, Bill Bolton has kept the maths to a minimum, avoided detailed programming instructions and presented the subject in a way that is not device specific - increasing its applicability to courses in electronics and control

## Overview

This is the introduction to PLCs for which baffled students, technicians and managers have been waiting. In this straightforward, easy-to-read guide, Bill Bolton has kept the maths to a minimum, avoided detailed programming instructions and presented the subject in a way that is not device specific - increasing its applicability to courses in electronics and control systems. The third edition has been expanded to contain new material on fail/safe operating conditions, Sequential Function Charts, floating point numbers and dummy rungs, with discussion of commercial PLCs. There is also extended coverage on the programming of PLCs for fault diagnosis, as well as distributed systems and program documentation. Each chapter is followed with a Problems section, for students to put the theory they have learnt into practice. Appendices contain further problems, and answers to all questions from each chapter are included at the back of the book.

## Product Details

ISBN-13:
9780750659864
Publisher:
Elsevier Science & Technology Books
Publication date:
07/15/2003
Edition description:
Third
Pages:
240
Product dimensions:
7.32(w) x 9.58(h) x 0.56(d)

## Related Subjects

 Preface vii 1 Programmable logic controllers 1.1 Controllers 1 1.2 Hardware 3 1.3 Internal architecture 5 1.4 Commercial PLCs 10 Problems 12 2 Input-output devices 2.1 Input devices 14 2.2 Output devices 23 2.3 Examples of applications 30 Problems 32 3 Input/output processing 3.1 Input/output units 35 3.2 Signal conditioning 40 3.3 Remote input/output connections 42 3.4 Networks 48 3.5 Processing inputs 53 3.6 Input and output addresses 54 Problems 56 4 Programming 4.1 Ladder diagrams 59 4.2 Logic functions 62 4.3 Latching 68 4.4 Multiple outputs 69 4.5 Entering ladder programs 69 4.6 Instruction lists 71 4.7 Boolean algebra 76 4.8 Function block diagrams 79 4.9 Sequential function charts 80 4.10 IEC standards 83 4.11 Programming examples 84 Problems 87 5 Internal relays 5.1 Internal relays 98 5.2 Internal relays in programs 99 5.3 Battery-backed relays 102 5.4 One-shot operation 103 5.5 Set and reset 104 5.6 Master control relay 105 5.7 Jump 108 5.8 Examples of programs 109 Problems 111 6 Timers 6.1 Types of timers 118 6.2 Programming timers 119 6.3 Off-delay timer 123 6.4 One-shot timers 125 6.5 Programming examples 126 Problems 127 7 Counters 7.1 Forms of counter 134 7.2 Programming 135 7.3 Up and down counting 139 7.4 Sequencers 140 Problems 144 8 Shift registers 8.1 Shift registers 150 8.2 Ladder programs 151 Problems 154 9 Data handling 9.1 Registers and bits 157 9.2 Data handling 158 9.3 Arithmetic instructions 161 9.4 Continuous control 162 Problems 164 10 Designing programs 10.1 Program development 166 10.2 Temperature control 168 10.3 Valve sequencing 171 10.4 Car park barriers 176 10.5 Production line control 179 10.6 Fail-safe systems 179 Problems 183 11 Testing and debugging 11.1 Commissioning and testing 187 11.2 Fault finding 190 11.3 System documentation 195 Problems 195 Appendix A Number systems 198 Problems 205 Appendix B Logic gates 207 Appendix C An example of an industrial program 211 Answers 232 Index 237

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