高速逻辑系统的PLC控制系统

可编程控制器是通用的专业工控机，由于它有高可靠、高抗干扰、体积小、价格便宜、使用方便的优点，普遍被使用于工业控制，但是由于速度慢，在高速系统中使用很困难，因此有一定的局限性，本文介绍一种在高速逻辑运行的系统中，采用相位同步的方法，用ＰＬＣ作控制系统，效果较好，在８０００型包装机和获得较大经济效益，本文专题讨如何进行这种用相位来严格与系统同步的方法。

PLC Control System of Speed Logic System

Programmable Logic controller (PLC) is a special computer for industrial control process. It is very stable and anti-distorbance. It is small, cheap and very convenient to use. Therefore it has alread been used widely in industry. But it's speed is slow. So it is difficulty to apply PLC in high-speed system, In this paper we introduce the phase synchronism technique of applying the PLC in high-speed.logic system. In the application of this approch in 8000-packing-machine, it has shown a great advantage.