|
ControlNet and Profibus - DP is internationally popular today two control level field bus, their superior performance, wide range of applications . A comprehensive introduction to the two bus their own characteristics , including the bus , the MAC ( Media Access Control) technology, packet formats and communication mode , and their advantages and disadvantages are analyzed . ControlNet and Profibus - DP network model is described in detail , some of the services they provide . The ControlNet many of the best performance comes from its CIP protocol , the article it is described in detail . Fieldbus is an important performance indicators in real-time , which is reflected in the size of the packet delay time . MAC mechanism used under the bus , describing the message from the generated queuing, waiting, sent to the receiver of this process , to analyze the delay time , and the computer modeling and simulation . In the simulation process , adjust various network parameters and observe their impact on the packet delay time and the relevant conclusions . These conclusions have practical significance of the actual network setup and optimization . The analysis and comparison of other aspects of the performance of the bus , and describes the development trend of the bus - Industrial Ethernet . This thesis is divided into six chapters , each chapter is summarized as follows: The first chapter introduces the development of fieldbus , fieldbus international standards and their application . The second chapter describes the ControlNet and Profibus - DP the bus protocol , MAC mechanism , packet formats and communication mode . The third chapter analyzes the ControlNet and Profibus - DP network model and related modeling analysis , analysis of relevant parameters on network performance . Chapter IV compares the ControlNet and Profibus - DP network performance, comprehensive analysis and comparison of coding efficiency , network efficiency , the delay time and other aspects . The fifth chapter describes the future development of the fieldbus . Chapter VI made ??a comprehensive summary .
|