基于以太网和现场总线的工业控制网络实训系统设计

摘要

对工业控制网络技术的现状和发展趋势进行了深入研究.选择当前工控领域应用十分广泛的工业以太网Profinet及现场总线Profibus-DP,由上位工控机PC、控制主站S7-300 PLC、智能从站变频器MM440、分布式I/O模块ET200S、触摸屏TP177B、工业以太网交换机、温湿度变送器、轴流风机等构成工业控制网络实训系统.研究了工业控制网络实训系统的整体结构、通信方式及原理、软硬件配置、网络组态、硬件组态、人机交互(HMI)应用、PLC梯形图程序编制及变频器参数设置等,通过PLC与变频器的Profibus总线通信,实现了全数字化的工业控制网络.与集散控制系统DCS等半数字化的控制系统相比,工业控制网络具有网络化的优势.工业控制网络实训系统在职业教育院校的理论与实际一体教学、职工培训和科研工作中具有实际的应用价值,值得其他从事自主研制开发实训设备的高职院校借鉴.%The current status and development trend of industrial control network technology are research.By selecting the industrial Ethernet Profinet and field bus Profibus-DP that are widely used in industrial control fields,the industrial control training system is constructed with the compositions of IPC as host computer,master control station S7-300 PLC,intelligent slave station frequency converter MM440,distributed I/O module ET200S,touch screen TP177B,industrial Ethemet switches,temperature/humidity transmitters,and axial fans,etc.The overall structure,communication mode and principle,configurations of hardware and software,network configuration,human machine interface (HMI) application,programming of ladder logic diagram,and parameters setting for frequency converter,etc.,of this training system are researched.The fully digitized industrial control network is realized through the Profibus communication between PLC and frequency converter.Comparing with the distributed control system and semi-digitized control system,this industrial control network features networking superiority.The training system based on industrial control network possesses practical applicable values for integrated theory and practice education in vocational education colleges,staff training,and scientific research work,it is worth to be referenced for researching and developing training devices in higher professional colleges.