基于模型的设计在PLC控制系统开发中的应用

Application of Model-based Design in the PLC Control System

以电梯控制为例,介绍了一种新的PLC控制系统的开发方式:基于模型的设计。先用Simulink/Stateflow建立了四层电梯模型,然后用MATLAB自带的代码自动转换工具Simulink PLC Coder将模型转换为符合PLC编程标准的结构化文本,导入到PLC编程软件RSLogix 5000中,得到电梯模型的功能块,并以此为基础编写电梯的控制程序。实验结果证明了这种PLC控制系统开发方式的可行性及高效性。

By an example of elevator control,this paper introduces a new method for developing a PLC control system：model-based design. Firstly,we create a 4-floor elevator model by using Simulink/Stateflow,and converted it to structural text by means of automatic code-converting tool Simulink PLC Coder brought by MATLAB.Then,we import the code to the PLC programming software RSLogix 5000 to get a function block of the elevator model.Finally,the elevator control program is formulated on this base.The test result shows that the new method for developing PLC control systems is practicable and efficient.