基于以太网器件的高性能工业现场总线FED

研究一种采用通用以太网物理层元件和FPGA器件构成的现场总线FED(Fieldbus based on Ethernet Devices),在片上系统(SOC,System On Chip)上开发出实用的现场总线通信装置.FED不需要复杂的驱动程序就可以实现链路层通信,在链路层基础上可以根据控制需要设计应用层通信协议.FED采用基于带飞读写功能的集总帧结构,使用主从式通讯.FED系统由1个主站和最多255个从站组成,实现了100 Mbit/s的高速实时通信.建立了实验系统,验证了FED总线可以满足数控机床等工业自动化设备的控制需求.

FED:high performance industrial fieldbus based on Ethernet devices

A kind of high-speed real-time fieldbus used in automation equipment named fieldbus based on Ethernet devices(FED) was studied.FED is based on Ethernet components and FPGA chip.System on chip(SOC) technology was used to develop a kind of practical FED device.Without complex driver,media access control layer communication was realized.The application layer protocol can be designed for different control tasks.FED performs at 100 Mbit/s on summation frame and employs "data operation on fly" technology.Master-slave structure is used in FED which supports one master and 255 slaves.The prototype system proves that FED can meet the high-speed and real-time requirement of industrial automation equipment.