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3 ＰＬＣ的通信及联网ＰＬＣ的通信包括ＰＬＣ之间、ＰＬＣ与上位计算机之间以及ＰＬＣ与其他智能设备间的通信。ＰＬＣ系统与通用计算机可以直接或通过通信处理单元、通信转接器相连构成网络,以实现信息的交换,并可构成“集中管理、分散控制”的分布式控制系统,满足工厂自动
3 PLC communication and networking PLC communication, including PLC, PLC and host computer and between PLC and other intelligent devices. PLC system and general-purpose computer can be directly or through the communication processing unit, communication adapter connected to form a network in order to achieve the exchange of information and can form a “centralized management, decentralized control” distributed control system to meet the factory automation