智能算法在S7-300 PLC中的研究与应用

摘要

针对智能控制算法在PLC中难于实现的缺点，基于OPC技术将MATLAB和PLC有机结合，设计了一个在线PID参数自整定的控制系统。 MATLAB从OPC服务器实时获取过程对象数据，通过智能算法的运算处理，产生PID参数修正值，在线返回修正PLC程序中的PID 参数。系统实际运行效果证明该设计有效提高了控制系统的性能，为复杂的智能算法在PLC控制中的广泛应用提供了借鉴。%Aiming at the disadvantage that the intelligent control algorithm is difficult to realize in PLC, based on the OPC technology, the MATLAB and PLC are combined together to design an online PID parameter self-tuning control system. MATLAB proceeded the real- time process data from the OPC server, through the calculation of intelligent algorithm processing, result a modified value,then re-turned the modified value to OPC server on- line. The actual operation result of the system proved that the design can effectively improve the performance of the control system, and reference is provided for complex intelligent algorithm applying in PLC control.