"Programmable Logic Controllers: Principles and Applications" is a foundational textbook authored by John W. Webb, with later editions co-authored by Ronald A. Reis. First published in 1992 with its second edition, the book was designed to serve as an accessible, practical, and comprehensive introduction to the world of PLCs, which, as the book notes, grew into a "billion dollar industry".
Modularize logic
Unlike many modern textbooks that dive straight into vendor-specific software (Rockwell, Siemens, or CODESYS), Webb takes a The early chapters focus on what a PLC actually is : how the CPU scans, how inputs are buffered in the I/O image table, and how relay ladder logic physically translates to digital logic. First published in 1992 with its second edition,
Given the book’s popularity, many people search for “Programmable Logic Controllers Principles And Applications By John W Webb.pdf.” While , here is what you should know:
: While comprehensive, some reviewers suggest that the integration between PLCs and standard PCs (a common modern industrial practice) could be more deeply explored. Final Verdict Final Verdict Basic DC circuits (Ohm’s law, relay
Basic DC circuits (Ohm’s law, relay coils, contacts). No prior programming required.
The book is organized into eight sections, comprising 28 chapters. The table of contents below is based on the 4th edition: For over three decades
In the landscape of industrial automation literature, few texts have achieved the status of a trusted companion quite like John W. Webb’s Programmable Logic Controllers: Principles and Applications . First emerging in the late 1980s, this book bridged the gap between the dying era of relay-based control panels and the dawn of microprocessor-driven manufacturing. For over three decades, it has remained a standard textbook for vocational technicians, engineering students, and maintenance professionals.