Industrial Ethernet And Network Controller

This thesis introduced The application of integrating Ethernet technologies into control systems is briefly described. The characteristics of DCSs , FCSs Ethernet-based Control systems are compared in details. It is pointed out that the application of Ethernet to industrial control is an important trend. All the problems which the thesis will solve and the basic concepts are listed in order to help readers to understand.The performance of Ethernet applied to automatic control is the focus discussed by engineers and researchers. Through simulations, the comparison of the performances and characteristics of Ethernet ControlNet and DeviceNet are given. The traditional Ethernet based on shared communication channels is not suitable for hard real-time control systems. A maths model of collision in the Ethernet is provided and several technologies are adopted to make the Ethernet real-time.After comparing Ethernet-based control systems with traditional control systems, it is obvious that the system we designed is of significance to the research of computer integrating plant automation (CIPA). The system of remote data acquiring we designed is described in detail. It is shown that the embedded Ethernet controller we designed is a very important device, which is linked to the Ethernet-based control system. In this chapter we give details of the controller design. The structure of the embedded controller the characteristic of the core chip the design of interface circuit the porting of uClinux OS and the realization of Embedded Web Server etc. are given in details.Finally several problems, which are also important to the application of Ethernet to industrial automation, are given in order to remind the readers who are interested in the technologies of Ethernet and Internet applied to industrial automation.