几种现场总线的通信介质访问控制方式

摘要

本文对LON、CAN、PROFIBUS和FF四种主要的现场总线进行介绍，尤其对通信介质访问控制方式进行了较详细的描述，将有助于用户选择适合自己需要的现场总线，来满足工业控制中的实时要求。%This paper presents four types of fieldbuses,i.e.LON,CAN,PROFIBUS and FF,and explains the communication media access control in detail,which can help users select appropriate fieldbuses to meet the real-time requirement of an industrial control system.