Implementation of improved PD control by using WinCC

The improved PD control system for water level integrates Matlab and WinCC,which is a kind of configuration software.Data acquisition,control action and human machine interface are designed by using WinCC,and the improved PD control arithmetic is designed with Matlab.The process variables,manipulations variables and set points are updated in real time between WinCC and Matlab by Dynamic Data Exchange(DDE) protocol.Experiment result shows that it is conscientiously feasible and deserves to be widely applied in the process of controlling industry.