Many control technologies are available for control. Early control systems relied upon mechanisms and electronics to build controlled. Most modern controllers use a computer to achieve control. The most flexible of these controllers is the PLC. This book addresses the need for a comprehensive examination of modern control techniques found in manufacturing environments. The book examines PLC usage for more complex control tasks. By the time the book is complete, students will comprehend how this work, and how they can be applied. The aim of preparing this book is to develop a teaching material appropriate and consistent with needs of students of college of Engineering, Mechatronics Department, that will help and cover the student's needs to understand and apply automation and PLC basic fundamental knowledge from fundamentals, concepts and definitions, to multiple examples and diverse applications. Therefore it was necessary for us to refer and use literature and a variety of sources to quote what is appropriate for achieving this aim.