Programmable Controllers
Theory and Implementation
Second Edition
L.A. Bryan
E.A. Bryan
PROGRAMMABLE
CONTROLLERS
T HEORY AND I MPLEMENTATION
Second Edition

L. A. Bryan
E. A. Bryan

An Industrial Text Company P...
© 1988, 1997 by Industrial Text Company
Published by Industrial Text Company
All rights reserved
First edition 1988. Secon...
Contents

C ONTENTS
Preface .................................................................................................
Contents

5-5 Configuring the PLC Memory—I/O Addressing ................................. 127
5-6 Summary of Memory, Scann...
Contents

9-8
9-9
9-10
9-11
9-12
9-13
9-14
9-15

Counter Instructions .......................................................
Contents

14-3
14-4
14-5
14-6
14-7
14-8

Process Dynamics ...................................................................
Contents

18-7 Network Protocols ................................................................................ 866
18-8...
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Preface

PREFACE
Since the first edition of this book in 1988, the capabilities of programmable
logic controllers have gro...
About the Authors

A BOUT THE AUTHORS
L UIS B RYAN
Luis Bryan holds a Bachelor of Science in Electrical Engineering degree...
How to Use this Book

HOW TO USE THIS B OOK
Welcome to Programmable Controllers: Theory and Implementation. Before you beg...
SECTION O NE

INTRODUCTORY
CONCEPTS
• Introduction to Programmable Controllers
• Number Systems and Codes
• Logic Concepts...
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www.industrialtext.com
C HAPTER
O NE

INTRODUCTION TO
PROGRAMMABLE CONTROLLERS
I find the great thing in this world is not so
much where we stand...
SECTION
1

Introductory
Concepts

Introduction to
Programmable Controllers

C HAPTER
H IGHLIGHTS

CHAPTER
1

Every aspect ...
SECTION Introductory
1
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

As you will see throughout this book...
SECTION
1

Introductory
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

In a short period, programmable con...
SECTION Introductory
1
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

integral-derivative), network, CANbu...
Introductory
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

sophisticated PLCs, with as many as 8,000 I/O ...
SECTION Introductory
1
Concepts

Introduction to
Programmable Controllers

•

CHAPTER
1

Data handling and manipulation in...
SECTION
1

Introductory
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

1-3 P RINCIPLES OF O PERATION
A pro...
SECTION Introductory
1
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

The operation of a programmable cont...
Introductory
Concepts

Introduction to
Programmable Controllers

0

1

2

CHAPTER
1

3

0

0

0

0

0

1

1

1

1

1

2

2...
SECTION Introductory
1
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

1-4 PLC S V ERSUS O THER T YPES OF C...
Introductory
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

Courtesy of Omron Electronics, Schaumburg, IL
...
Introduction to
Programmable Controllers

CHAPTER
1

A second distinction of PLCs is that their hardware and software are ...
SECTION
1

Introductory
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

The personal computer is, however, ...
SECTION Introductory
1
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

T YPICAL A REAS OF PLC A PPLICATIONS...
SECTION
1

Introductory
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

Because the applications of program...
SECTION Introductory
1
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

GLASS PROCESSING
Annealing Lehr Cont...
SECTION
1

Introductory
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

Storage and Retrieval Systems. A PL...
SECTION Introductory
1
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

Coal Fluidization Processing. The co...
SECTION
1

Introductory
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

1-5 PLC P RODUCT A PPLICATION R ANG...
SECTION Introductory
1
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

(a)

Courtesy of PLC Direct, Cumming...
SECTION
1

Introductory
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

1-6 L ADDER D IAGRAMS AND THE PLC
T...
SECTION Introductory
1
Concepts

Introduction to
Programmable Controllers

L1

L2
PB1

LS1

L1
PB1

LS1

PL

CHAPTER
1

L2...
SECTION
1

Introductory
Concepts

Introduction to
Programmable Controllers
Hardwired
PB1

LS1

Description
PL

No Event
Ta...
SECTION Introductory
1
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

Table 1-3 lists some of the many fea...
Introductory
Concepts

Introduction to
Programmable Controllers

L1

CHAPTER
1

L2

PLC
Power L1

POWER
RUN
OK

L1
0

PROG...
SECTION Introductory
1
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

configuration, a PLC can send useful...
Introductory
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

Courtesy of Omron Electronics, Schaumburg, IL
...
SECTION Introductory
1
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

E ASE OF M AINTENANCE AND T ROUBLESH...
SECTION
1

Introductory
Concepts

Introduction to
Programmable Controllers

CHAPTER
1

With the aid of the programming dev...
C HAPTER
T WO

NUMBER SYSTEMS
AND CODES
I have often admired the mystical ways of
Pythagoras and the secret magic of numbe...
SECTION
1

Introductory
Concepts

C HAPTER
H IGHLIGHTS

Number Systems
and Codes

CHAPTER
2

In this chapter, we will expl...
SECTION
1

ntroductory
Concepts

Number Systems
and Codes

CHAPTER
2

one less than the base (9 is one less than 10). Beca...
SECTION
1

Introductory
Concepts

Number Systems
and Codes

CHAPTER
2

As you will see in other number systems, the decima...
SECTION
1

ntroductory
Concepts

Number Systems
and Codes

CHAPTER
2

As with the decimal system, expressing binary number...
SECTION
1

Introductory
Concepts

Number Systems
and Codes

CHAPTER
2

Counting in binary is a little more awkward than co...
SECTION
1

ntroductory
Concepts

Number Systems
and Codes

Decimal

Binary

Octal

0
1
10
11
100
101
110
111
1000
1001
101...
SECTION
1

Introductory
Concepts

Number Systems
and Codes

CHAPTER
2

So, a 16-bit binary number can be represented direc...
SECTION
1

ntroductory
Concepts

Number Systems
and Codes

Position

3

2

1

Number

F

1

A 6

CHAPTER
2

0
16

6 x 160=...
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