This book has been prepared as a textbook to give an insight to Programmable Logic Controllers (PLC) based automation which is emerged out of the latest technological advancements in computers and communication, that guides the Modern industrial environment. Programmable Logic Controllers (PLC) is the conglomeration of these two areas. PLC based automation forms the lifeline of modern automated Industries. With the advent of versatile networking techniques, PLCs are used in a complicated networked environment to enhance the efficiency of industries. This gives rise to a growing need for PLC training. Presented in a lucid language, the book helps the students to understand the subject step-by-step. This book is divided into seven chapters and provides a comprehensive treatment of Programmable Logic Controllers. - from Amzon