PLC control scheme of cation exchanger, which has application in the desalted water process, is presented in this paper. The design of software and hardware is also described.

• 从工程角度介绍可编程控制器（PLC）用于脱盐水处理中阳离子交换器的控制方案，并给出了有关硬件及软件的设计要点。