NMBC-01 ABB

The communication network connects the process station and the HMI into a system.There are several different types of structures for communication networks.Such as bus,ring and star.The bus shape is also logically circular.The star is only suitable for small systems.Whether it is a ring or a bus,broadcast is generally used.Some other protocols have been used less.The speed of the communication network is around 10M and 100M.

Human-machine interface has 4 different forms of nodes,they are operation station,engineer station,historical trend station and dynamic data server.

The operating station is installed with the operating system,monitoring software and the driver software of the controller.Display system labels,dynamic flow charts and alarm information.

通讯网络把过程站和人机界面连成一个系统。通讯网络有几种不同的结构行式。如总线式、环形和星形。总线形在逻辑上也是环形的。星形的只适用于小系统。不论是环形还是总线形，一般都采用广播式。其它一些协议方式已用的较少。通讯网络的速率在10M和100M左右。

人机界面有4种不同形式的结点，它们是操作站、工程师工作站、历史趋势站和动态数据服务器。

操作站安装有操作系统、监控软件和控制器的驱动软件。显示系统的标签、动态流程图和报警信息。