电子系统网络.pdf

8. FieldBus Basics FieldBus Systems • Fieldbus is made up of – Field 传感器 which means a factory/plant which has sensors and actuators within it 执行器 – Bus which means a digital communication system • This is combined to use the digital communications system to connect the sensors and actuators. FieldBus Systems • Fieldbus is therefore a means of digital communication used in Automation and Process Systems to and from Sensors and Actuators from a controller such as a PLC. • A programmable logic controller (PLC) or programmable controller is a digital computer used for automation of electromechanical processes, such as control of machinery on factory assembly lines, amusement rides, or lighting fixtures. 装配生产线 固定装置 节点 FieldBus Systems Advantages of Fieldbus Systems: • Reduced Costs • Cabling Material Reduced 安装 • Installation Costs Reduced 调试 • Commissioning Times Reduced 竞争 • Competition between supplier 维护 • Easier Maintenance 扩展 • Easy Expansion 故障排除 • Troubleshooting Simplified 情报 • Intelligence built into the system 可靠 • More Reliable 分布式 • Shorter Response Times-Distributed Control Euro Standards EN and International Standards Contents of the CENELECfieldbus standards. The dates given in brackets are the dates of ratification by the CENELEC Technical Board [1] P