利用S7-200系列PLC联网实现制冷系统实时监测和控制

Use S7-200 Series PLC Network to Realize Real-time Monitoring and Controlling of Cooling System

本文主要介绍了西门子S7-200系列PLC的通讯技术特点以及1000吨制冷装置的系统配置、控制思想。利用S7-200系列PLC的PPI通讯方式实现了4台PLC设备联网通讯。在研华工业控制机的WINDOWS平台上,采用"组态王"软件,利用S7-216端口1的自由口通讯方式,实现了制冷系统的集中监测和控制。

The communication technique features of Siemens S7-200 series PLC is described and the system configuration of 1000t cooling equipment is introduced Using PLC PPI communication,a 4-PLC Network is composed. At win95 platform of Yan Hua IPC,using Zute Wang software and S7-216 port 1.,the concentrated monitoring and controlling of cooling system is realized.