Programmable Logic Controllers.
Title:
Programmable Logic Controllers.
Author:
Bolton, William.
ISBN:
9780080462950
Personal Author:
Edition:
4th ed.
Physical Description:
1 online resource (302 pages)
Contents:
Cover -- Programmable Logic Controllers -- Contents -- Preface -- Changes from third edition -- Aims -- Structure of the book -- 1 Programmable logic controllers -- 1.1 Controllers -- 1.1.1 Microprocessor controlled system -- 1.1.2 The programmable logic controller -- 1.2 Hardware -- 1.3 Internal architecture -- 1.3.1 The CPU -- 1.3.2 The buses -- 1.3.3 Memory -- 1.3.4 Input/output unit -- 1.3.5 Sourcing and sinking -- 1.4 PLC systems -- 1.4.1 Programming PLCs -- Problems -- 2 Input-output devices -- 2.1 Input devices -- 2.1.1 Mechanical switches -- 2.1.2 Proximity switches -- 2.1.3 Photoelectric sensors and switches -- 2.1.4 Encoders -- 2.1.5 Temperature sensors -- 2.1.6 Position/displacement sensors -- 2.1.7 Strain gauges -- 2.1.8 Pressure sensors -- 2.1.9 Liquid level detector -- 2.1.10 Fluid flow measurement -- 2.1.11 Smart sensors -- 2.2 Output devices -- 2.2.1 Relay -- 2.2.2 Directional control valves -- 2.2.3 Motors -- 2.2.4 Stepper motors -- 2.3 Examples of applications -- 2.3.1 A conveyor belt -- 2.3.2 A lift -- 2.3.3 A robot control system -- 2.3.4 Liquid level monitoring -- Problems -- 3 Number systems -- 3.1 The binary system -- 3.2 Octal and hexadecimal -- 3.2.1 Octal system -- 3.3 Binary arithmetic -- 3.3.1 Signed numbers -- 3.3.2 One's and two's complements -- 3.3.3 Floating point numbers -- 3.4 PLC data -- Problems -- 4 I/O processing -- 4.1 Input/output units -- 4.1.1 Input units -- 4.1.2 Output units -- 4.2 Signal conditioning -- 4.3 Remote connections -- 4.3.1 Serial and parallel communications -- 4.3.2 Serial standards -- 4.3.3 Parallel standards -- 4.3.4 Protocols -- 4.3.5 ASCII codes -- 4.4 Networks -- 4.4.1 Distributed systems -- 4.4.2 Network standards -- 4.4.3 Examples of commercial systems -- 4.5 Processing inputs -- 4.6 I/O addresses -- Problems -- 5 Ladder and functional block programming -- 5.1 Ladder diagrams.
5.1.1 PLC ladder programming -- 5.2 Logic functions -- 5.2.1 AND -- 5.2.2 OR -- 5.2.3 NOT -- 5.2.4 NAND -- 5.2.5 NOR -- 5.2.6 Exclusive OR (XOR) -- 5.3 Latching -- 5.4 Multiple outputs -- 5.5 Entering programs -- 5.5.1 Ladder symbols -- 5.6 Function blocks -- 5.6.1 Logic gates -- 5.6.2 Boolean algebra -- 5.7 Program examples -- 5.7.1 Location of stop switches -- Problems -- 6 IL, SFC and ST programming methods -- 6.1 Instruction lists -- 6.1.1 Ladder programs and instruction lists -- 6.1.2 Branch codes -- 6.1.3 More than one rung -- 6.1.4 Programming examples -- 6.2 Sequential function charts -- 6.2.1 Branching and convergence -- 6.2.2 Actions -- 6.3 Structured text -- 6.3.1 Conditional statements -- 6.3.2 Iteration statements -- 6.3.3 Structured text programs -- Problems -- 7 Internal relays -- 7.1 Internal relays -- 7.2 Ladder programs -- 7.2.1 Programs with multiple input conditions -- 7.2.2 Latching programs -- 7.3 Battery-backed relays -- 7.4 One-shot operation -- 7.5 Set and reset -- 7.5.1 Program examples -- 7.6 Master control relay -- 7.6.1 Examples of programs -- Problems -- 8 Jump and call -- 8.1 Jump -- 8.1.1 Jumps within jumps -- 8.2 Subroutines -- Problems -- 9 Timers -- 9.1 Types of timers -- 9.2 Programming timers -- 9.2.1 Sequencing -- 9.2.2 Cascaded timers -- 9.2.3 On-off cycle timer -- 9.3 Off-delay timers -- 9.4 Pulse timers -- 9.5 Programming examples -- Problems -- 10 Counters -- 10.1 Forms of counter -- 10.2 Programming -- 10.2.1 Counter application -- 10.3 Up and down counting -- 10.4 Timers with counters -- 10.5 Sequencer -- Problems -- 11 Shift registers -- 11.1 Shift registers -- 11.2 Ladder programs -- 11.2.1 A sequencing application -- 11.2.2 Keeping track of items -- Problems -- 12 Data handling -- 12.1 Registers and bits -- 12.2 Data handling -- 12.2.1 Data movement -- 12.2.2 Data comparison -- 12.3 Arithmetic functions.
12.3.1 Arithmetic operations -- 12.4 Closed loop control -- 12.4.1 Modes of control -- 12.4.2 PID control with a PLC -- Problems -- 13 Designing systems -- 13.1 Program development -- 13.1.1 Flow charts and pseudocode -- 13.2 Safe systems -- 13.2.1 PLC systems and safety -- 13.2.2 Emergency stop relays -- 13.2.3 Safety PLCs -- 13.3 Commissioning -- 13.3.1 Testing inputs and outputs -- 13.3.2 Testing software -- 13.3.3 Simulation -- 13.4 Fault finding -- 13.4.1 Fault detection techniques -- 13.4.2 Program storage -- 13.5 System documentation -- 13.5.1 Example of an industrial program -- Problems -- 14 Programs -- 14.1 Temperature control -- 14.2 Valve sequencing -- 14.2.1 Cyclic movement -- 14.2.2 Sequencing -- 14.2.3 Sequencing using a sequential function chart -- 14.2.4 Car park barrier operation using valves -- 14.3 Conveyor belt control -- 14.3.1 Bottle packing -- 14.4 Control of a process -- Problems -- Appendix: Symbols -- Ladder programs -- Function blocks -- Logic gates -- Sequential function charts -- Instruction List (IEC 1131-3 symbols) -- Structured text -- Answers -- Index -- A -- B -- C -- D -- E -- F -- G -- H -- I -- J -- L -- M -- N -- O -- P -- R -- S -- T -- U -- V -- W -- X.
Abstract:
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 jargon to a minimum, considered all the programming methods in the standard IEC 1131-3 - in particular ladder programming, and presented the subject in a way that is not device specific to ensure maximum applicability to courses in electronics and control systems. Now in its fourth edition, this best-selling text has been expanded with increased coverage of industrial systems and PLCs and more consideration has been given to IEC 1131-3 and all the programming methods in the standard. The new edition brings the book fully up to date with the current developments in PLCs, describing new and important applications such as PLC use in communications (e.g. Ethernet - an extremely popular system), and safety - in particular proprietary emergency stop relays (now appearing in practically every PLC based system). The coverage of commonly used PLCs has been increased, including the ever popular Allen Bradley PLCs, making this book an essential source of information both for professionals wishing to update their knowledge, as well as students who require a straight forward introduction to this area of control engineering. Having read this book, readers will be able to: * Identify the main design characteristics and internal architecture of PLCs * Describe and identify the characteristics of commonly used input and output devices * Explain the processing of inputs and outputs of PLCs * Describe communication links involved with control systems * Develop ladder programs for the logic functions AND, OR, NOT, NAND, NOT and XOR * Develop functional block, instruction list, structured text and sequential function chart programs * Develop programs using internal relays, timers, counters,
shift registers, sequencers and data handling * Identify safety issues with PLC systems * Identify methods used for fault diagnosis, testing and debugging programs Fully matched to the requirements of BTEC Higher Nationals, students are able to check their learning and understanding as they work through the text using the Problems section at the end of each chapter. Complete answers are provided in the back of the book. * Thoroughly practical introduction to PLC use and application - not device specific, ensuring relevance to a wide range of courses * New edition expanded with increased coverage of IEC 1131-3, industrial control scenarios and communications - an important aspect of PLC use * Problems included at the end of each chapter, with a complete set of answers given at the back of the book.
Local Note:
Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, 2017. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries.
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