S7-1200PLC在物料混合控制系统中的应用

针对传统的物料混合装置控制精度低、可靠性不足等问题,提出采用西门子S7-1200 PLC和触摸屏来控制与监视物料混合系统的工作过程,实现两种物料从进料、搅拌到出料控制等功能。控制单元基于TIA博途全集成自动化软件平台编制梯形图。触摸屏作为上位机实现人机界面交互的功能,经试验表明,采用模块化程序设计软件代替传统的继电控制,各控制阀能精确实现开启、关闭功能,液位升降模拟过程真实、精准,系统运行稳定,不仅可大大提高生产效率,而且可降低系统故障率。

In situ measurement method for radiation of pantograph arcing

Aiming at the problems of low control accuracy and low reliability of the traditional material mixing device, this paper proposes to use Siemens S7-1200 PLC and touch screen to control and monitor the working process of the material mixing system, so as to realize the control functions of the two materials from feeding, stirring to discharging. Control unit based on TIA Botu fully integrated automation software platform to compile ladder diagram. Touch screen as a function of PC to realize man-machine interface interaction, the test shows that using modular programming software instead of traditional relay control, the control valve to realize opening and closing function accurately, liquid level fluctuation simulation process is true, accurate, the system runs stably, not only can greatly improve the production efficiency, and can reduce the failure rate.