An introduction programmable logic controllers (PLCs). It avoids detailed programming instructions and presents the subject in a way that is not device-specific. The book aims to enable the reader 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 by PLCs; describe communication links involved with control systems; develop ladder programs for the logic functions AND, OR, NOR, NAND, NOT and XOR; develop ladder programs involving internal relays, timers, counters, shift registers, sequencers and data handling; and identify methods used for testing and debugging. The second edition includes expanded sections on internal architecture, input-output devices, networks, and programming languages with microprocessor systems.
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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
Bill Bolton is a leading author of college texts in engineering and other technical subjects. As well as being a lecturer for many years, he has worked in industry, been Head of Research, Development and Monitoring at the British Training and Education Council and acted as a consultant for UNESCO and the Further Education Unit (FEU).
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