Over the years, the PLC controller has achieved the leap from wiring logic to storage logic from its generation to now. The function is from weak to strong, which achieves progress from logic control to digital control. The application area is from small to large, which achieves the leap from simple control of single devices to competent motion control, process control, distributed control and other tasks. Nowadays, the PLC controller has greatly improved its ability to handle all aspects of analog quantities, digital operations, human-machine interfaces and networks. It has become the mainstream control equipment in the industrial control field and is playing an increasingly important role in all walks of life.
At present, the PLC controller has been widely used in various industries at home and abroad such as steel, petroleum, chemical, electric power, building materials, machinery manufacturing, automobiles, textiles, transportation, environmental protection and cultural entertainment. The application is mainly divided into the following categories: switch logic control, industrial process control, motion control, data processing, communication and networking.
1. It has high reliability and strong anti-interference ability.
2. It has complete supporting facilities, complete functions and strong applicability.
3. It is easy to learn and use, which is welcomed by engineers and technicians.
4. The design of the system makes the workload small. It is easy to maintain and reform the system.