PLC (Communication Units)

PLC (communication unit) is an abbreviation of Programmable Logic Controller, and is a control device developed as an alternative to relay circuits. It is also commonly referred to as a "sequencer." Control is performed according to a program consisting of elements such as logic operations, sequential operations and arithmetic operations. This electrical part transmits signals and is widely used not only for the control of automatic machines at factories, but also for controlling everyday machines such as elevators, automatic doors and theme park rides. A PLC is a type of small computer that is assembled like other computers. A programming language is used for the program that digitizes the relay circuit. It cannot be made by regular computer programmers; it requires electrical engineers who have specialist knowledge.