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本文结合工程实例,采用VB设计上位机的外挂界面和作为数据库管理平台;后台数据库软件采用ACCESS 2003;上位机与PLC之间采用ROCKWELL的RSLink作为OPC协议。将ACCESS 2003与PLC结合起来,弥补了PLC存储、管理大量数据能力不足的缺陷。通过此系统,用户可方便地在上位机中存储、查看和打印下位机(PLC)中的信息,监视PLC的工作状态,并制作生产报表。现场的运行结果显示该系统使用方便,性能可靠。
In this paper, combined with engineering examples, the use of VB design PC plug-in interface and as a database management platform; back-end database software using ACCESS 2003; PC and the PLC using ROCKWELL RSLink as the OPC protocol. ACCESS 2003 and PLC will be combined to make up for the shortcomings of PLC storage, lack of capacity to manage large amounts of data. Through this system, the user can conveniently store, check and print the information in the lower computer (PLC) in the upper computer, monitor the working status of the PLC and make production reports. The operation results of the field show that the system is easy to use and reliable in performance.