Application of real-time communication of Matlab with S7-200 PLC in process control experimental device based on OPC

Experimental teaching is essential key to modern education activities. In this paper,the application plan of real-time communication of Matlab with S7-200 PLC based on OPC technology in A3000 process control experiment device was proposed. The single neuron PID control scheme was realized by Matlab using S7-200 PLC as OPC server and Matlab as OPC client. The single neuron PID control had the capacity of self-learning and adaptive,thus to a certain extent,solved the difficult of traditional PID controller tuning parameters in real time and improved the adaptability of the system to environmental changes. This program made Matlab simulation was no longer confined to traditional offline computing and pure digital simulation,and easy to implement advanced algorithms in real systems.