PLC and intelligent instruments and intelligent execution devices(such as frequency converters)can also communicate with each other,exchange data and operate each other.It can be connected into a remote control system,and the system range can be as large as 10 kilometers or more.It can form a local network,not only PLC,but also high-end computers and various intelligent devices can enter the network.The bus network can be used,and the ring network can also be used.The net can also be set.Networks can also be bridged.Networking can organize thousands of PLCs,computers,and intelligent devices in a network.The nodes in the network can communicate and exchange information directly or indirectly.
PLC与智能仪表、智能执行装置(如变频器),也可联网通讯,交换数据,相互操作。可联接成远程控制系统,系统范围面可大到10公里或更大。可组成局部网,不仅PLC,而且高档计算机、各种智能装置也都可进网。可用总线网,也可用环形网。网还可套网。网与网还可桥接。联网可把成千上万的PLC、计算机、智能装置组织在一个网中。网间的结点可直接或间接地通讯、交换信息。
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