Modeling And Simulation Of Fieldbus Protocols

The protocols of three kinds of fieldbus are researched in this paper. This paper reviews three kinds of fieldbus protocol specification, describes the finite state machine model of protocol respectively, and establishes the simulation platforms of three kinds of fieldbus control system based on these models. By formularizing the protocols, it will be easy to comprehend these fieldbus protocols. Simulation platform demonstrates the dynamic communication actions, and the performances of fieldbus protocol can be evaluated on it.Based on an analysis of FF protocol specification, the sender and the receiver state machine models about three different DLL mechanisms for transferring data are built. From the point of view of node-center, the state-machine models of LAS and basic device are established. After analyzing CAN protocol specification, the node-centric state machine models of sender and receiver are built respectively. As a supplement for the model, the error count state machine models are established. After HART protocol specification is introduced, the state-machine models of send-message and receive-message are built. In addition, the node-centric...