Which majors open programmable logic controller (PLC), it is mainly used in what areas?

General automation and electrical engineering and automation majors open the door, in fact, PLC and other professions do not have much contact, as long as there are some microcontroller foundation and programming thinking can be, it is mainly used for some electrical control, to achieve the weak control of the strong power, or the automation of the system, as well as the system of some of the safety protection