Download PDF Cascading Logic: A Machine Control Methodology for Programmable Logic Controllers, by Gary Kirckof
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Cascading Logic: A Machine Control Methodology for Programmable Logic Controllers, by Gary Kirckof
Download PDF Cascading Logic: A Machine Control Methodology for Programmable Logic Controllers, by Gary Kirckof
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Written for programmable logic controller programmers, this book describes how to create a functional machine control program for industrial equipment that is sequential in nature.The programming methodology starts by breaking the machine into its basic elements. These small and manageable elements allow the programmer to focus on large concerns before dealing with specifics. The methodology then shows how to program each element and how to assemble the elements together into a complete machine control program. The book is intended to provide programmers with the confidence they need to reach decisions, and move forward with the certainty that the program is performing as intended without odd combinations of logic causing unintentional actions. The sequential nature of events will also help operators and maintenance personnel troubleshoot and maintain the equipment after it is put into operation. Ladder logic illustrations demonstrate each part of the text. Although the ladder logic examples use the instruction set for the Allen Bradley SLC 500 programmable logic controller, the concepts and techniques can be used with any brand of programmable logic controller.
- Sales Rank: #1439933 in Books
- Brand: Brand: ISA: The Instrumentation, Systems, and Automation Society
- Published on: 2002-10-02
- Original language: English
- Number of items: 1
- Dimensions: 9.75" h x 6.75" w x .50" l, .90 pounds
- Binding: Paperback
- 206 pages
- Used Book in Good Condition
Most helpful customer reviews
7 of 7 people found the following review helpful.
Top marks all around
By Thomas E. Seeley
This book is very good. Most PLC books do little more than explain ladder-logic. Gary Kirchof assumes you understand relays and ladders and are ready to put the stuff to good use. He shows you how to approach a machine control design with a methodology that incorporates all the nuances that you will need like manual mode versus automatic mode and how to make problems easy to isolate. This book would be an excellent reference for engineering courses teaching PLC programming as it would give the students practical applications.
0 of 0 people found the following review helpful.
ISBN 155617814X
By Ghost(Ghost(M))
This is a strange-looking page with no publishing information, reviews, and so on. The real, fully functional page for this book is at amazon.com/gp/product/155617814X/. The ISBN for this book is 155617814X. Prices are different too -- go figure. This page here must be a glitch of some sort; it's not a different book.
3 of 3 people found the following review helpful.
More intelligent than rest, good second step
By Ghost(Ghost(M))
This book covers more interesting things than just ladder logic and instructions. Make it the second book after you've learnt the basics. Btw, the ISA site has the table of contents at [...] (now, I won't be surprised if Amz cuts out this link, but hey... I've tried. If it's gone, just google on the book's title, you'll find it. Make the author's name (Kirchof OR Kirckof)... apparently the publisher isn't quite sure, so there you go). I'd recommend this book, for the right reader (if you've been a controls engineer for five years or more, chances are you'll find nothing new here, but if not, you'll shorten the learning curve).
Edit: naturally, they removed the link. OK, so I guess I can paste in the table of contents:
Cascading Logic: A Machine Control Methodology for Programmable Logic Controllers
Gary Kirckof, P.E.
v
Contents
ABOUT THE AUTHOR ix
INTRODUCTION xi
Chapter 1 LADDER LOGIC BASICS 1
1.0 Introduction, 1
1.1 Rungs and Branches, 2
1.2 Program Execution and Scan Time, 3
1.3 One Shots, 4
1.4 Always On Bit, 5
1.5 First Scan Bit, 6
1.6 Alternators, 6
1.7 Binary Counters, 7
1.8 One Scan Oscillator, 9
1.9 Latches, 9
1.10 Duty Timers, 12
1.11 DeMorgan's Theorem, 12
1.12 Other Circuits, 14
Chapter 2 SEQUENCES AND MOTION OBJECTS 15
2.0 Introduction, 15
2.1 Functional Grouping, 15
2.2 Documentation, 17
2.3 Sequences, 17
2.4 The Motion Object, 20
2.5 Summary, 27
vi Table of Contents
Chapter 3 OUTPUT LOGIC 29
3.0 Introduction, 29
3.1 Application Considerations, 29
3.2 Spring-Return Valves, 32
3.3 Auxiliary Rungs, 32
3.4 Spring-Return Valve Output Latch, 35
3.5 Recovery, 37
3.6 Double-Ended, Detented Valves, 39
3.7 Double-Ended Valve Output Logic (Spring-Return Configuration), 40
3.8 Double-Ended Valve Output Logic (Double-Ended Configuration), 41
3.9 Three-Position Valves, 42
3.10 Three-Position Cylinders, 45
3.11 Pulse Outputs, 46
3.12 Conclusion, 47
Chapter 4 SIMULATING SENSORS 49
4.0 Introduction, 49
4.1 Cylinders with Only One Sensor, 49
4.2 Cylinders with No Sensors, 50
4.3 Time-Driven Motion Objects, 50
4.4 Output Logic Versus Motion Objects, 52
Chapter 5 CHECKING SENSORS 53
5.0 Introduction, 53
5.1 Problems with Lone Sensors, 54
5.2 Back Checking, 55
5.3 Forward Checking, 57
5.4 Position Bits, 59
5.5 How Often Sensors Are Checked, 60
5.6 Home Position, 61
Chapter 6 CONTROLLING SEQUENCES 65
6.0 Introduction, 65
6.1 Types of Sequences, 65
6.2 Common Control Structure, 66
6.3 Conclusion, 75
Chapter 7 STEP AND SINGLE CYCLE 77
7.0 Introduction, 77
7.1 Why Have Stepping?, 77
7.2 Why Have Single Cycle?, 78
7.3 Mode Selection, 78
7.4 Single-Cycle Control, 80
7.5 Step Mode Control, 82
7.6 Modified Sequence Control, 83
Table of Contents vii
7.7 Mix and Match Modes, 85
7.8 Machine Running, 86
7.9 In Cycle, 87
7.10 Fault Recovery, Debug, and Startup Tools, 87
Chapter 8 SYSTEM CONTROL 91
8.0 Introduction, 91
8.1 Summary of Sequence Control, 91
8.2 Control Hierarchy, 94
8.3 System Control, 96
8.4 Starting Auxiliary Equipment with the Machine, 103
8.5 Program Structure, 103
8.6 Summary, 104
Chapter 9 PARENT/CHILD SEQUENCES 107
9.0 Introduction, 107
9.1 The Dial Machine, 107
9.2 The Dial Sequence, 112
9.3 Typical Station Sequence, 124
9.4 Cycle Stop Points, 128
9.5 Manual Load/Unload Stations, 131
9.6 Dial Mechanisms, 131
9.7 Indexing Stations, 133
9.8 Code Generation and Checking, 134
Chapter 10 DECISION LOGIC 137
10.0 Introduction, 137
10.1 The Pick/Place Example, 137
10.2 Part Inspection, 137
10.3 Continuing Sequences, 142
10.4 Branching Sequences, 143
10.5 Converging Sequences, 143
10.6 Parallel Branches, 144
10.7 Conclusion, 145
Chapter 11 DEPENDENT SEQUENCES 147
11.0 Introduction, 147
11.1 The Example, 147
11.2 The Problem, 149
11.3 The Solution, 152
11.4 Other Problems, 152
11.5 Conclusion, 154
viii Table of Contents
Chapter 12 MACHINE STATES 155
12.0 Introduction, 155
12.1 Machine States, 156
12.2 Machine State Concepts, 156
12.3 Power Off State, 158
12.4 First Scan State, 158
12.5 Fault State, 159
12.6 Manual Mode State, 162
12.7 Ready and Not Ready States, 162
12.8 Running State, 163
12.9 Other Possible States, 164
12.10 Conclusions, 164
Chapter 13 MESSAGE LOGIC 167
13.0 Introduction, 167
13.1 Motion Object, 168
13.2 Message Displays, 169
13.3 Message Display Logic, 169
13.4 Types of Messages, 171
13.5 Message Text, 172
13.6 Message Logic Payback, 173
Appendix A 175
GLOSSARY 185
INDEX 203
PS. The price, of course, is unconscionable. Get your employer to pay for it, or try to find a cheap second-hand copy. Thirty bucks would be OK, but not ninety.
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