PLC变频调速恒压控制输油系统

PLC Type Frequency Control of Motor Speed Constant Pressure Controlling Oil Transporting System

介绍了PLC变频调速恒压控制输油系统的工艺要求、运行原理，PLC控制系统的硬件选择及组成，以及自动、手动报警系统的软件设计思路。该系统具有恒压控制输油，自动化程度高，运行可靠、节约电能等特点。

篢he technical process rcqurienient,operating prin-ciple of the Pl,C type frequency control of rnotorspeed oil transporting system of constant pressurecontrolled are discussed,giving Put the method ofcomposing the system, selecting running soft-wares,and the software design method of the autoand manual warning systen1. The PLC controllingsystem features less power consumptlon, high au-tomation,reliable operation as a result of the goodutilization of the bigh and new techno1ogy of fre-quency control of motor speed.