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1764-MM2 罗克韦尔
1764-MM2
EtherCAT标准在EtherCAT网络中不支持其它类型的以太网数据帧。这主要是为了保持实时以太网通道的畅通,用于EtherCAT数据帧的处理。在EtherCAT网络中有非EtherCAT数据帧(与EtherCAT不匹配的以太网类型)的情况下,EtherCAT从器件将通过使数据帧校验和 (CRC) 无效来销毁这个数据帧。这使得非EtherCAT数据帧在标准以太网器件中无法使用,而它们将终停止“污染”EtherCAT网络。
通过将以太网数据帧封装在一个EtherCAT数据帧内,可以在EtherCAT网络中传送标准以太网数据帧(传输控制协议/互联网协议 (TCP/IP),用户数据报协议 (UDP))。这通过位于EtherCAT主机处理器协议栈顶端的不同EtherCAT系统配置完成。其中的一个示例系统配置就是用EtherCAT实现以太网。
1764-MM2
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