PLC control system refers to the use of programmable logic controllers (PLC) as the control core of the industrial control system.PLC is a digital electronic device with a microprocessor for automation control of the digital logic controller, can be loaded into the memory at any time control instructions for storage and execution.

The basic components of PLC control system are as follows:

PLC: PLC is the core of PLC control system, which is responsible for logical operation of input signals and controlling output devices according to the results of logical operation.
Input device: The input device converts the state information of the external environment into electrical signals and transmits them to the PLC.
Output device: The output device controls the external equipment according to the control instruction of PLC.
Power supply: Provide power supply for PLC and input and output devices.
Communication interface: Used for PLC to communicate with other devices.
PLC control system has the following characteristics:

Strong versatility: PLC can be used in a variety of industrial control occasions, including machinery manufacturing, metallurgy, chemical industry, electric power, transportation and other industries.
Easy to use: PLC programming language is simple, easy to learn and use.
Wide range of adaptability: PLC can control various types of mechanical equipment or production processes.
High reliability: PLC adopts advanced microelectronics technology and has high reliability.
Strong anti-interference ability: PLC adopts a variety of anti-interference measures, can work stably in the harsh industrial environment.
PLC control system has been widely used in the field of industrial control, the main application areas include:

Machinery manufacturing: PLC is used for the control of production processes such as machining, assembling and packaging.
Metallurgy: PLC is used for smelting, rolling, forging and other production process control.
Chemical industry: PLC for chemical production process control.
Electricity: PLC is used for the control of electric power system.
Transportation: PLC is used for the control of transportation system.
With the continuous development of industrial automation technology, PLC control system will play a more important role in the field of industrial control.