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兼用：在PLC实施控制的同时，也可实施信息控制。
PLC用作信息控制，或兼做信息控制，既是PLC应用的一个重要方面，又是信息化的基础。
5．用于远程控制
远程控制是指，对系统的远程部分的行为及其效果实施检测与控制。PLC有多种通讯接口，有很强的联网、通讯能力，并不断有新的联网的模块与结构推出。所以，PLC远程控制是很方便的。
PLC与PLC可组成控制网。可通讯，交换数据，相互操作。参与通讯的PLC可多达几十、几百个。网与网还可互联。这样，参与通讯的PLC则更多，以至于不受限制。
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