Abstract: The safety operation and protection of air compressor is of great importance to the production of factories and mining enterprises. Integrating the conventional relay control, computer control and communication control technologies, programmable logic control (PLC) is designed specially for industrial control. Sensing detection instruments and PLC are used to control mine air compressors, realizing the design of air compressor monitoring system so as to help the production system gain good economic benefits and safety performance. The paper describes the composition, protection function, control principle, system communication, collection of system signals and design idea of the PLC system of air compressors.

Key words: Air compressor, PLC, Control system