A programmable logic controller (PLC) is a microprocessor-based computer unit that can perform control functions of many types and varying levels of complexity. PLCs are designed to be easy and flexible to work with. The first commercial PLC system was developed in the early 1970s to replace hardwired relay controls used in large manufacturing assembly plants. The initial use of PLCs covered automotive assembly lines, jet engines, and large chemical plants. PLCs are used today in many tasks including robotics, conveyor systems, manufacturing control, process control, electrical power plants, wastewater treatment, and security applications.
- Explain what a programmable logic controller (PLC) is and discuss its advantages over relay systems.
- Identify the main system components of a PLC and that of a PC.
- You may not realize that PLCs are everywhere making daily activities/tasks easier by automation. Look for PLCs in your daily life (industry automation, home automation, etc.). Compare and contrast a PLC and general-purpose computer in relation to your daily life. For example, including how and where PLCs improve or impact your life.
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