PLC is an electronic device designed specifically for use in industrial environments for the operation of digital arithmetic. It uses a memory that can be programmed to store instructions within it to perform logical operations, sequential operations, timing, counting and arithmetic operations, and can control various types of machinery or production processes through digital or analog inputs and outputs.PLC and its related peripherals should be designed to form an integrated whole with an industrial control system that is easy to extend its functionality.
From the definition of the above we know that this is a do control things, so that is a tool, you use him to control machinery, belonging to the mechanical industry, control is the electrical side of things, should be the electrical industry. Suggest that you do the electrical industry, income should be better than the mechanical aspects of some, but more years of work, really learned the skills of the mechanical industry is also not a lot of money ah. The current wage is generally not much.