DO232
工业以太网和普通以太网虽然都是以太网技术,但是它们在通信方式、数据传输速率、数据可靠性、网络协议、硬件要求等方面都有所不同,主要是因为工业环境和应用场景的特殊性。主要有以下区别。
1.通信方式:
普通以太网使用的是广播通信方式,一个包发送给网络上的所有设备,然后设备通过MAC地址进行识别并接收数据。而工业以太网则使用点对点通信方式。
2.数据传输速率:
普通以太网的速率一般为10M或100M,而工业以太网的速率则会更高,一般为1G或更高,以满足工控系统对实时性和带宽的要求。
3.数据可靠性:
工业以太网对于通信的可靠性要求更高,因为在工业环境中,一旦通信中断,可能会造成严重后果。因此,工业以太网使用了许多可靠性标准和技术,如冗余传输和双网环备份。
4.网络协议:
普通以太网使用TCP/IP协议进行通信,而工业以太网则使用了更多的实时协议,如Modbus、CANopen等,以保证对工控系统的支持。
5.硬件要求:
工业以太网对于硬件的要求更高,如交换机的处理能力、抗干扰能力、温度范围等。由于工业环境的特殊性,所以工业以太网的硬件要求更加苛刻。
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