描述
IO的采样数据经CPU转换后变为整形数据或实形数据,在操作级网络(层网络)上传输。因此操作级网络可以采用数据吞吐量适中、传输速度快、连接方便的网络标准,同时因操作级网络一般布置在控制室内,对抗干扰的要求相对较低。因此采用标准以太网是佳选择。TCP/IP协议是一种标准以太网协议,一般我们采用100Mbit/s的通讯速度。
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