ABSTRACT
Allen Bradley (https://www.ab.com/) B&R Automation (www.br-automation.com) GE (https://www.ge.com/) Messung (www.messung.com) Mitsubishi (https://www. mitsubishicorp.com/jp/) Omron PLC (https://omron-plc.com/) PLC Hardware (https://www.plchardware.com/) Siemens (https://www.usa.siemens.com) Schneider Electric (https://www.schneider-electric.com/
corporate) Toshiba (https://www.toshiba.com/)
INTRODUCTION
Automation is a key word for industries where plants are running with optimum utilization of resources to achieve high efciency and increased productivity. The degree of sophistication of real-time automatic system is based on how the signals/images are processed. These techniques change day by day due to technological advancements. Research in process control and automation has gained momentum in last three decades. This change is due to the rapid advances in computational technology, networking, control system, and process optimization. The competition due to globalization resulted in better process control, optimum utilization of resources, and higher level of automation in all process industry sectors. New control paradigms are developed, with ease of operation, less downtime, prediction, and correction for performance degradation of control components. One technique being promisingly used by industry is the programmable logic controllers (PLCs). The PLC is a tool mainly used to control plants where discrete signals dominate the continuous signals. In this chapter, the step-by-step procedures to develop and test logic are discussed. The related information on the hardware is also described for easy selection and implementation.
