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PLC是以计算机技术为核心的通用自动控制装置，也可以说它是一种用程序来改变控制功能的计算机。随着微处理器、计算机和通信技术的飞速发展，可编程序控制器PLC已在工业控制中得到广泛应用，而且所占比重在迅速的上升。PLC主要由CPU模块、输入模块、输出模块和编程装置组成。它应用于工业混合搅拌设备，使得搅拌过程实现了自动化控制、并且提升了搅拌设备工作的稳定性，为搅拌机械顺利、有序、准确的工作创造了有力的保障。本文所介绍的多种液体混合的PLC控制程序可进行单周期或连续工作，具有断电记忆功能，复电后可以继续运行。另外，PLC还有通信联网功能，再通过WINCC组态，可直接对现场监控、更方便工作和管理。
关键词：可编程序控制器PLC；液位传感器； 定时器；
Abstract
Computer technology as the core of PLC in the general automatic control equipment, it is a kind of program to change control function of the computer. As microprocessors, computer and communication technology, the rapid development of PLC programmable controller has widely applied in industrial control, and the proportion of the rapid rise in. PLC mainly consists of CPU module, input and output module and programming module device. It is applied in industry, mixing equipment mixing process realized automation control, and improved the stability, agitate equipment work for the mixing machine smoothly, orderly, accurate working creates powerful guarantee. This paper introduces various liquid mixture of PLC control procedures can be a single cycle or continuous working memory function, can continue running after, wired back. In addition, PLC and communications, networking WINCC configuration, but through direct to site monitoring and management, and more convenient.
Key words: PLC programmable controller, Level sensor, The timer,