FED:high performance industrial fieldbus based on Ethernet devices
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摘要: 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.Abstract: 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.
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Key words:
- Ethernet devices /
- summation frame /
- data operation on fly /
- system on chip(SOC)
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