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1、现场总线Fieldbus,技术相关（Technology）,数值变送技术Value transmission technology,4-20mA,HART,Fieldbus,digital,analog+digital(hybrid),analog,4.20 mA,现场设备设计Field Device Design,Identical base devicePA or FF electronics设备基于PA或FF电子模块,总线系统优势Advantage of a bus system,通过数字通讯可获取更多信息 More information thanks to digital commu
2、nication,1st value=70,322nd value=23,02单位unit=mbar状态status=ok诊断diagnose=温度过高 Temerature too high,15,3 mA,传统方式conventional,数字digital,总线系统优势Advantage of a bus system,更精确的数值More accurate values,过程控制Process Control,0-65535,10-38-10+38,循环数据传输Cyclic(scheduled)Data Transmission,PROFIBUS-PA,FOUNDATION Field
3、bus,主机控制数据交换（中央控制机理）One cyclic master controls data exchange(Central Control Philosophy),现场设备直接进行数据交换Direct data exchange between field devices possible(Distributed Control Philosophy),从站通过GSD进行描述Slaves are described by GSD(Device Data Base-DDB),从站通过普通文件格式描述(DD file)Slaves are described by Common Fi
4、le Format(CFF),现场设备管理Field Device Management,PROFIBUS-PA,FOUNDATION Fieldbus,现场设备管理Field Device Management,PROFIBUS-PA,FOUNDATION Fieldbus,PROFIBUS-DPRS485,coupler/Link,PROFIBUS-PAIEC 61158-2,PLC,PC,High Speed Ethernet,LinkingDevice,FFIEC 61158-2,PLC,PC,FF,FF,LinkingDevice,FF总线的防爆方案,调试工具Service Tool
5、,PROFIBUS-PA,FOUNDATION Fieldbus,Proficard/Profiboard(Softing)Commuwin II(Endress+Hauser)Coupler(Pepperl+Fuchs),PCMCIA Card(NI)NI ConfiguratorI(NI)Power Supply(NI),Bus with spurs,Fieldbus,Bus with spurs,Fieldbus,Bus with Junctions Box,Bus with spurs,Fieldbus I/O,Point-to-Point,Fieldbus,Point to Point,市场比较Typical Strenghts,
