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可编程序控制器在工业控制领域中有着十分广泛的使用,它在工业控制中与计算机分别作为下位机和上位机构成监控系统。这篇文章在介绍与计算机两种通讯方法的基础上,给出了使用这两种方法进行通讯时的上位机和下位机的程序。

(Programmable logic controller is widely used in the field of industrial control. It forms a monitoring system with the computer as the lower computer and the upper computer respectively in the industrial control. Based on the introduction of two communication methods with the computer, this article gives the programs of the upper computer and the lower computer when using these two methods to communicate.)

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