Overview of Embedded Soft PLC Based on Codesys and Communication System Design

CoDeSys is a complete development environment for programmable logic control PLCs with the advantages of openness, flexibility, power and portability. This paper introduces the application features of the CoDeSys software and the embedded soft PLC technology respectively. The CoDeSys hierarchical architecture and the application of visualization features, the advantages of embedded systems and soft PLC technology are described in detail. Then a complete embedded soft PLC system is designed by combining CoDeSys as the upper computer development system with the real-time operation system. The system is modified in real time by adding CoDeSys RTE extension software to the controller kernel, CoDeSys as the development software, based on TCP/IP protocol to communicate and control the real-time operation system, the raspberry pi development board into an industrial controller, and finally the rationality of the system is confirmed by the test of red and green light on/off control, reflecting the The final test confirmed the system's reasonableness through the red and green light control test, reflecting the practicality of combining CoDeSys and soft PLC.