Programmable Controllers - 1st Edition - ISBN: 9780750604987, 9781483183770

Programmable Controllers

1st Edition

An Engineer's Guide

Authors: E.A. Parr
eBook ISBN: 9781483183770
Imprint: Newnes
Published Date: 20th January 1993
Page Count: 336
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Description

Programmable Controllers: An Engineer's Guide focuses on the application and use of programmable controllers, including programming techniques, good software practices, and software engineering.

The monograph first takes a look at computers and industrial control and programming techniques. Discussions focus on programming methods, bit storage, counters, timers, identification of input/output and bit addresses, input/output connections, types of control strategies, and advantages of PLC control. The manuscript then examines programming style and analog signals, closed loop control, and intelligent modules. Concerns include intelligent modules, specialist control processors, software engineering, program structure in various PLCs, and housekeeping and good software practices.

The publication tackles practical aspects, industrial control with conventional computers, man-machine interface, and distributed systems. Topics include parallel and serial communications, ISO/OSI model, serial standards, simple digital control and indicators, computer graphics, maintenance and fault finding, and programming for real time control.

The monograph is a valuable reference for computer science experts and researchers with a keen interest in programmable controllers.

Table of Contents


Preface

1 Computers and Industrial Control

1.1 Introduction

1.2 Types of Control Strategies

1.2.1 Monitoring Subsystems

1.2.2 Sequencing Subsystems

1.2.3 Closed Loop Control Subsystems

1.2.4 Control Devices

1.3 Enter the Computer

1.3.1 Computer Architectures

1.3.2 Machine Code and Assembly Language Programming

1.3.3 High Level Languages

1.3.4 Application Programs

1.3.5 Requirements for Industrial Control

1.3.6 The Programmable Controller

1.4 Input/Output Connections

1.4.1 Input Cards

1.4.2 Output Connections

1.4.3 Input/Output Identification

1.5 Remote I/O

1.6 The Advantages of PLC Control

2 Programming Techniques

2.1 Introduction

2.2 The Program Scan

2.3 Identification of Input/Output and Bit Addresses

2.3.1 Racks, Cards and Signals

2.3.2 Allen Bradley PLC-5

2.3.3 Siemens SIMATIC S5

2.3.4 CEGELEC GEM-80

2.3.5 ABB Master

2.3.6 Mitsubishi F2

2.3.7 Internal Bit Storage

2.4 Programming Methods

2.4.1 Introduction

2.4.2 Ladder Diagrams

2.4.3 Logic Symbols

2.4.4 Statement List

2.5 Bit Storage

2.6 Timers

2.7 Counters

2.8 Numerical Applications

2.8.1 Numeric Representations

2.8.2 Data Movement

2.8.3 Data Comparison

2.8.4 Arithmetical Operations

2.9 Combinational and Event-Driven Logic

2.9.1 Combinational Logic

2.9.2 Event-Driven Logic

3 Programming Style

3.1 Introduction

3.2 Software Engineering

3.3 Top-Down Design

3.4 Program Structure in Various PLCs

3.5 Housekeeping and Good Software Practice

4 Analog Signals, Closed Loop Control and Intelligent Modules

4.1 Introduction

4.2 Common Analog Signals

4.2.1 Temperature

4.2.2 Pressure

4.2.3 Flow

4.2.4 Speed

4.2.5 Weighing Systems

4.2.6 Level

4.2.7 Position

4.2.8 Output Signals

4.3 Signals and Standards

4.4 Analog Interfacing

4.4.1 Resolution

4.4.2 Multiplexed Inputs

4.4.3 Conversion Times

4.4.4 Channel Selection and Conversion to Engineering Units

4.4.5 Analog Input Cards

4.4.6 Filtering

4.5 Analog Output Signals

4.6 Analog-Related Program Functions

4.7 Closed Loop Control

4.7.1 Introduction to Control Theory

4.7.2 Stability and Loop Tuning

4.7.3 Closed Loop Control and PLCs

4.8 Specialist Control Processors

4.9 Intelligent Modules

4.10 Installation Notes

5 Distributed systems

5.1 Parallel and Serial Communications

5.2 Serial Standards

5.2.1 Introduction

5.2.2 Synchronization

5.2.3 Character Codes

5.2.4 Transmission Rates

5.2.5 Modulation of Digital Signals

5.2.6 Standards and Protocols

5.2.7 Error Control

5.2.8 Point to Point Communication

5.3 Area Networks

5.3.1 Introduction

5.3.2 Transmission Lines

5.3.3 Network Topologie

5.3.4 Network Sharing

5.3.5 A Communication Hierarchy

5.4 The ISO/OSI Model

5.5 Proprietary Systems

5.5.1 Introduction

5.5.2 Allen Bradley Data Highway

5.5.3 Gem 80 Starnet, ESP and Coronet

5.5.4 Siemens SINEC

5.5.5 Ethernet

5.5.6 Towards Standardization

5.6 Safety and Practical Considerations

5.7 Fibre Optics

6 The Man-Machine Interface

6.1 Introduction

6.2 Simple Digital Controls and Indicators

6.3 Numerical Outputs and Inputs

6.3.1 Numerical Outputs

6.3.2 Multiplexed Outputs

6.3.3 Leading Zero Suppression

6.3.4 Numerical Inputs

6.4 Alarm Annunciation

6.5 Analog Indication

6.6 Computer Graphics

6.6.1 Introduction

6.6.2 Block Graphics; the Allen Bradley Panelview

6.6.3 Pixel Graphics; the CEGELEC Imagem

6.6.4 Practical Considerations

6.6.5 Data Entry

6.7 Message Displays

7 Industrial Control with Conventional Computers

7.1 Introduction

7.2 Bus-Based Machines

7.2.1 Introduction

7.2.2 IEEE-488 Parallel Interface Bus

7.2.3 Backplane Bus Systems

7.2.4 IBM PC Clones

7.3 Programming for Real Time Control

8 Practical Aspects

8.1 Introduction

8.2 Safety

8.3 Design Criteria

8.4 Constructional Notes

8.4.1 Power Supplies

8.4.2 Equipment Protection

8.5 Maintenance and Fault Finding

8.5.1 Introduction

8.5.2 Statistical Representation of Reliability

8.5.3 Maintenance Philosophies

8.5.4 Designing for Faults

8.5.5 Documentation

8.5.6 Training

8.5.7 Fault-Finding Aids, EDDI and FIMS

Appendix Number Systems

Index

Details

No. of pages:
336
Language:
English
Copyright:
© Newnes 1993
Published:
Imprint:
Newnes
eBook ISBN:
9781483183770

About the Author

E.A. Parr