基于组态软件的液位控制系统设计

Design for Level Control System Basing on Configuration Software

随着计算机技术的发展,计算机控制技术在过程控制中占有十分重要的地位。液位控制系统是PLC在工业控制中的重要应用,本文阐述了PLC及MCGS的基本工作原理,详细介绍了基于PLC和MCGS的液位控制系统的设计和实现,主要包括系统的实现原理、结构框图、控制界面、软件程序等。本系统是基于PLC的双容水箱的液位自动控制系统,即当液位低于设定的下限值时,系统自动打开泵上水;当水位到达设定值时,系统自动关闭水泵。利用现场相关的硬件设施如变送器等配合上位机MCGS组态软件完成现场数据的采集、报表输出和曲线显示,提高液位控制系统的控制精度和控制界面的友好性。

With the development of computer technology, computer control plays a significant role in process control. Liquid level control is the important application of PLC in industrial control. The general information about the PLC and the MCGS design and realization of the liquid height control based on the PLC and the MCGS are mainly introduced in this article, and the theory of realization, structure diagram and the programmer of the control are presented. This system is a two-volumes water tank liquid level control system based on PLC, that is, when the liquid level is under initialization, the system can turn on the pump automatically; when the water level reaches the set value, the system will shut down the pump automatically. Using the site-related hardware such as the transmitter, transducer, etc combine with the upper computer MCGS configuration software to complete field data collection, report output and curve display. It improves the control accuracy and the interfaces friendliness.