描述
上位机通过RSLINX软件,建立与PLC的联系,可以通过RS232和以太网任意一种通讯方式通讯。本控制系统中,上位机监控操作员站通过以太网借助交换机与PLC进行通讯,设置工程师调试接口,同时交换机预留和其他系统进行数据交换和通讯的端口。网络拓扑图见下图2.
监控软件RSview-SE安装在上位监控计算机,开发出工艺流程界面,通过以太网一方面把设备的状态点取上来,在流程界面上显示;另一方面把操作员发出的操作命令送到PLC,进而通过PLC的输出驱动相应的设备做出动作响应。
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