基于EtherCAT的从站设计

Based Design Ether CAT Slave

现场总线已经成为自动化控制技术重要组成部分,通过大量的实践实验与测试,如今已经获得广泛的应用。Ether CAT具有良好的实时能力,适应小数据量通信,并且价格经济,在工业控制上得到广泛的应用。但由于Ether CAT从站设计必须使用专门的芯片,导致从站的硬件设计复杂、调试困难、成本增加。文章采用AM3358 Cortex A8处理器外加以太网物理层收发器(PHY)的方案,由于AM3358片内集成工业用通信子系统(PRU-ICSS)可以实现Ether CAT协议,因此只要外加PHY就可以成为Ether CAT从站。

Fieldbus has become an important part of the automatic control technology, through a large number of practical experiments and testing, now widely applied. Ether CAT has good real-time capability to adapt to the small amount of data communications, and affordable, the industrial control has been widely used. However, due to Ether CAT Slave design must use a special chip, leading from the station complex hardware design, commissioning difficulties, increasing costs. In this paper, AM3358 Cortex A8 processor plus Ethernet physical layer transceiver（PHY） program, due to the integrated chip inside AM3358 Industrial communications subsystem（PRU-ICSS） Ether CAT protocol can be achieved, so long as the external PHY can become Ether CAT Slave..