随着可编程控制器技术的不断发展,其应用领域也在不断的扩大。各种PLC 及其组态软件也应运而生。但为了降低成本,对于在小型的对象上的运用,一般可以使用一些自编的通讯软件和监控界面,实现对工艺对象的自动控制。文章以水处理中某段装置的控制工艺为实例,叙述了通讯实现的编制过程。关键词:通信,PLC,自动控制,水处理,VBAbstract: PLC technology, which has been adopted in more and more fields, has achieved increasing improvement, resulting in the appearance of various types of PLC and its team software. In order to reduce the cost, automatic control can be realized in small-sized technological designs by adopting some self-programmed communication software and monitoring screen By taking the water treatment control in some device in technological designs as example, the thesis relates the programming procedure through communication software.Key words:communication;PLC;automatic control;water treatment;VB;
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