FF总线与ProfiBus总线比较.ppt

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 device PA 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 digita

2、l communication,1st value = 70,32 2nd 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,PROFI

3、BUS-PA,FOUNDATION Fieldbus,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) Sla

4、ves are described by Common File 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-DP RS485,coupler/ Link,PROFIBUS-PA IEC 61158-2,PLC,PC,High Speed Ethernet,Linking Device,FF IEC 61158-2,PLC,PC,FF,FF,Linking Device,FF总线的防爆方案,调试工具Service Tool,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 sp