Research on application of virtual controlled object in PLC practical teaching

虚拟仿真被控对象基于Web3D、数学建模及通信接口技术实现,可分为全虚拟仿真被控对象和半实物仿真被控对象两类。前者通过S7-ProSim接口与仿真PLC相连,构建控制系统;后者基于硬件通信板卡连接至真实控制系统。两类对象的应用可有效解决PLC实践教学中设备昂贵、场地有限、设备维护成本高等问题,完善控制系统设计环节,促进教学标准化、工程化,同时满足实验室开放及学生创新的需求。The virtual simulation controlled object is based on Web3D, mathematical modeling and communication interface technology, which consists of two kinds of full virtual simulation and semi-physical simulation. To build the control system, the full virtual is connected with the simulative PLC（progrmmable logit controller） through the ST-ProSim and the semi-physical simulation is used with the real PLC through communication card. Two kinds of objects can effectively solve the problems of high equipment cost, limited space and high maintenance cost in PLC practical teaching, and can also improve the control system design process, and promote standard and engineering practical teaching, while meeting the demands of laboratory open-principle and students＇ innovation