Programmable Logic Controllers

by William Bolton

Overview

This textbook, now in its sixth edition, continues to be straightforward and easy-to-read, presenting the principles of PLCs while not tying itself to one manufacturer or another. Extensive examples and chapter ending problems utilize several popular PLCs, highlighting understanding of fundamentals that can be used regardless of manufacturer. This book will help you to understand the main design characteristics, internal architecture, and operating principles of PLCs, as well as Identify safety issues and methods for fault diagnosis, testing, and debugging. New to This edition:

• A new chapter 1 with a comparison of relay-controlled systems, microprocessor-controlled systems, and the programmable logic controller, a discussion of PLC hardware and architecture, examples from various PLC manufacturers, and coverage of security, the IEC programming standard, programming devices and manufacturer’s software
• More detail of programming using Sequential Function Charts
• Extended coverage of the sequencer
• More Information on fault finding, including testing inputs and outputs with an illustration of how it is done with the PLC manufacturer’s software
• New case studies

Product Details

ISBN-13:	9780128029299
Publisher:	Elsevier Science
Publication date:	03/03/2015
Edition description:	6th Revised ed.
Pages:	424
Product dimensions:	7.40(w) x 9.30(h) x 0.90(d)

About the Author

Former Lecturer at Buckingham Chilterns University College, High Wycombe, UK, and now retired, William Bolton has worked in industry and academia as a senior lecturer in a college of technology, a member of the Nuffield Advanced Physics team, an adviser to a British government aid project in Brazil on technical education, as a UNESCO consultant in Argentina and Thailand, and as Head of Research and Development at the Business and Technician Education Council. He has written many engineering textbooks, including Mechatronics, 4th ed., Engineering Science, 5th ed., Higher Engineering Science, 2nd ed., Mechanical Science, 3rd ed., and Instrumentation and Control Systems.

Read an Excerpt

A concise, thoroughly practical and accessible introduction to Programmable Logic Controllers.

Table of Contents

	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

What People are Saying About This

From the Publisher

A concise, thoroughly practical and accessible introduction to Programmable Logic Controllers

Editorial Reviews

This revision of the 1996 edition, suitable for a first university course, is in line with new specifications for programmable logic controllers. Includes expanded sections on PLC's internal architecture, input-output devices/processing, networks, and sequencers and continuous control. Appends information on number systems (decimal, binary, hexadecimal) and answers to chapter problems. Lacks references and identification of the author's affiliation. Annotation c. Book News, Inc., Portland, OR (booknews.com)

Booknews

"Hydraulics with a few fundamentals is included, which is good for anyone interfacing with certain machine control applications. Examples aid the reader in understanding how some of these devices are used." —Jeremy Pollard, Publisher of the Software User Online, Control Design, January 2007

From the Publisher