西门子400PLC系统DP网络故障处理及预防方法

Siemens 400PLC System DP Network Troubleshooting and Prevention

目前很多控制系统都采用西门子400PLC产品,对于一些大型系统,现场输入输出点很多,需要很多输入输出模块,而PLC柜内空间一般不足以容纳数量众多的模块,因此,需要将一定数量的模块安装在现场远程站中,这样,输入模块采集到现场的信号后,就需要用DP线组成的DP通讯网络将信号传递给PLC,同时PLC的指令也需要通过DP通讯网络传递给输出模块,实现对设备的控制。DP通讯网络一旦出现通讯故障,就会造成现场设备状况得不到监控,设备失去控制,进而造成设备停止运行,影响生产。在本文中,笔者根据自己在工作中处理西门子400PLC系统DP通讯网络故障的经历,论述西门子400PLC系统DP通讯网络故障的处理及预防方法。

At present, many control systems use Siemens 400 PLC products？ For some large-scale systems, there are many on-site input and output points and many input and output modules are needed？ The PLC cabinet space is generally insufficient to accommodate a large number of modules？ Therefore, a certain number of The module is installed in the field remote station？ In this way, after the input module collects the signal from the site, it needs to use the DP communication network composed of the DP line to transmit the signal to the PLC？ At the same time, the PLC instruction also needs to be transmitted to the output module through the DP communication network？ Realize the control of the equipment？ If communication failure occurs in the DP communication network, the status of the field devices will not be monitored and the devices will lose control, causing the equipment to stop operating and affecting production？ In this article, according to the experience of dealing with the failure of the DP communication network of Siemens 400 PLC system in the work, the author discusses the processing and prevention methods of the DP communication network fault of the Siemens 400 PLC system？