Programmable Logic Controllers (PLCs) is used to make efficient industrial automation in factories, market, and different workplaces. Programmable Logic Controllers (PLCs) are small industrial computers with modular components designed to automate customized control processes. PLCs are often used in factories and industrial plants to control motors, pumps, lights, fans, circuit breakers, and other machinery.
To understand the purpose of PLCs better, let’s look at a brief history of PLCs.Industrial automation began long before PLCs. In the early to mid-1900s, automation was usually done using complicated electromechanical relay circuits. However, the number of relays, wires, and space needed to create even simple automation was problematic. Thousands of relays could be necessary to automate a simple factory process! And if something in the logical circuit needed to be changed? Oh boy!
In 1968 the first programmable logic controller came along to replace complicated relay circuitry in industrial plants. The PLC was designed to be easily programmable by plant engineers and technicians that were already familiar with relay logic and control schematics. Since the beginning, PLCs have been programmable using ladder logic which was designed to mimic control circuit schematics. The ladder diagrams look like control circuits where power is flowing from left to right through closed contacts to energize a relay coil.
This workbook describes and discusses all details of the PLC history, construction, principle of working, wiring, programming, and applications. once the candidate learns how to make PLC connections and programming, then he will have the fundamentals and be able to work on projects and complete tasks required for industrial automation.
Who should take this product?
Engineers, technicians, vocational teachers and instructors, university doctors, engineering college and university PLC labs, engineering college and university students, technical and vocational school students, and hobbyists will find this workbook useful, necessary, and applicable. It depends on PLC Siemens S7 connection and programming software (S7-Simatic software). The book explains all details of PLC theoretically including several exercises and practical activities. It focuses on explaining the principles of using the PLC to control electro-pneumatic systems, while industrial applications use the same principles and similar procedures to be controlled by the PLC.