一、概述可编程序控制器(简称PC)是建立在计算机技术上发展起来的一种主要用于顺序控制的装置,它代替了原来的继电器顺序控制装置。虽然PC仍以计算机原理进行工作,但在抗干扰性和操作简易性等方面要优于过程控制计算机。因此,它是一种较理想的工业过程控制设备。二、PC应用于水泥工业的必要性近年来,随着水泥生产规模的扩大,自动控制水平要求也越来越高。从我国新引进的水泥生产线来看,绝大多数都采用了PC进行顺序控制。其原因主要是: First, an overview of programmable logic controller (PC) is based on the computer technology to develop a mainly used for sequential control device, which replaces the original relay sequence control device. Although the PC is still working on computer principles, it is superior to process control computers in terms of anti-interference and ease of use. Therefore, it is a more ideal industrial process control equipment. Second, the PC application of the cement industry in recent years, with the expansion of the scale of production of cement, automatic control level requirements are getting higher and higher. From the newly introduced cement production line in China, the vast majority have adopted the PC for sequential control. The main reason is: