Industrial Automation is a discipline that includes knowledge and expertise from various branches of engineering including electrical, electronics, chemical, mechanical, communications and more recently computer and software engineering. Automation & Control byits very nature demands a cross fertilization of these faculties. Industrial Automation Engineers have always drawn new technologies and implemented original or enhanced versions to meet their requirements. As the range of technology diversifies the demand on the innovative ability of these Engineers has increased. IDC Technologies has been in the business of bringing together the domain gurus and the practicing engineers under an umbrella called training. The sum of the knowledge that IDC Technologies has acquired over many years has now given it an opportunity to compile this comprehensive hand book for the reference of every automation engineer.