Ethernet Modbus / Tcp Protocol-based Industrial Real-time

With the development of Internet, traditional Industrial Control Systems intend to be an open network. When Fieldbuses are at war (or in an active state of conflict), Industrial Ethernet emerges as the times require. The advantages of Ethernet, such as high communication speed, resourceful hardware and software, potential of durative development and especially based on open IEEE Std. 802.3, are porting Ethernet to the Control Layer and Device layer of the Control Systems. Using of Industrial Ethernet technology must be the new direction of Control Network in the future. Through doing research on the key technology of Industrial Ethernet, the subject of "Research on the Module of Industrial Control Network in the Manufactory Floor based Ethernet" aims to develop communications software, which satisfies the real time transmission of Industrial Ethernet Technology. Based on the part of the subject which I have taken on, the content of my paper is as the following:1. Study on the technology of Fieldbuses and Industrial Ethernet.2. Do in-depth research the real time theory of Industrial Ethernet and Modbus TCP/IP protocol of Schneider's. Through MB/TCP experimentation, the factors of affecting Industrial Ethernet's real time are analyzed.3. Realize some PID control arithmetic in ActiveX. When the users use the communication software based on Network, the control function can be supported by the software on configuration, which complements limitations of calculation and the control abilities.