基于CAN总线过程控制实验平台远程监控系统通信实现.doc

摘 要 随着计算机技术，现代电子技术的发展，各种现场总线技术开始出现，教学实践环节必须能够适应新技术的发展要求。过程控制实验室EFPT/P实验装置采用模块化结构,便于功能扩展。为了使实验设备得到更充分的利用，并使现场总线技术应用到过程对象的控制过程，因此提出了基于CAN总线的过程控制系统实验室开发任务。 基于CAN总线的过程控制实验室建设系统是专门针对本校过程控制实验室的完善工作。除完成原来过程控制课程的实验开设外，使实验室能够进行基于CAN总线的网络技术实验。本课题通过CAN485MB、PCI-5110、OPC服务器和组态王构建了一个可靠远距离传输的通信网络，可在监控界面上写入PID参数，则OPC服务器就会把这些数据发送到CAN网络上，在CAN网络另一端的CAN485MB转换器接收到此帧数据，再把它还原为发送的PID参数，最后从串口发送到宇光AI808仪表上。OPC服务器同时实时接收从CAN网络另一端的CAN485MB转换器上发出的对应帧ID的CAN帧数据并还原成串口数据保存起来，当用户向对应COM端口调用函数读取数据的时候，OPC服务器就把这些数据返回给组态软件的界面上。 关键字：过程控制实验室，CAN485MB转换器，OPC服务器，组态王  ABSTRACT With modern computer technology and electronic technology development, various field-bus technology has begun to emerge. Teaching practice must adapt to the new technology development. Process control laboratory EFPT / P device modular architecture and is easy functional expansion. For Experimental equipment to be more fully utilized and field-bus technology applied to the process object of the control process, we set up the building of process control system laboratory based on CAN Bus. Based on CAN bus process control of laboratory construction, system is in the process of the perfect job control laboratories. Besides completing the course for process control, laboratory experiments CAN be based on CAN bus network technology experiment. This topic through CAN485MB, PCI - 5110, OPC server and kingview to construct a reliable communication network, long-distance transmission in writing on the interface, PID parameters OPC server will take these data sent to the CAN network, on the other side of the CAN network CAN485MB converter receives this frame data, and put it to send the PID parameters, finally from the serial sent to AI808 yuguang instrument. OPC server simultaneously receive from the CAN network real-time CAN485MB converter on the other side of the corresponding frame ID CAN frame and serial data reduction of data stored, when the user to the corresponding COM ports of call functions, read data