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液位控制是工业生产中比较典型的控制任务之一.而PLC和触摸屏在自动化控制中应用越来越广泛。提出了一种基于S7-200 PLC和MCGS触摸屏软件的水箱液位控制系统设计方案,详细介绍7PtD控制算法.系统硬件的设计和S7-200 PLC和触摸屏的通信方法,实际运行表明,该系统能实时调节液位使之平衡,并可记录和存储数据.而且结构简单.还具有在线修改功能,灵活性强。
Liquid level control is one of the typical control tasks in industrial production, while PLC and touch screen are more and more widely used in automation. A design scheme of tank level control system based on S7-200 PLC and MCGS touch-screen software is presented, and the 7PtD control algorithm is introduced in detail.The design of system hardware and the communication method of S7-200 PLC and touch screen show that the system can Real-time adjustment of the liquid level to balance, and record and store data. And simple structure. Also has online modification, flexibility.