S7-200PLC在逻辑无环流可逆直流调速系统中的应用

Application of S7-200PLC in logical non-circulating-current DC reversible speed system

运用S7-200PLC控制技术,构建逻辑无环流可逆直流调速系统,利用PLC编程实现系统逻辑无环流换向、两级PID运算及保护功能。所构建的调速系统与相关拖动设备联机,其运行调试结果证明该系统可实现无环流可逆调速的目的,并具有较高的稳定性、快速性和抗干扰能力,因而对改造传统设备具有现实意义。

By using S7-200 PLC control technology,we construct logical non-circulating DC reversible speed adjusting system,and realize the function of logic commutation without circulating current,two stage logic PID calculation and protection functions by using PLC programm.The system is connected with driving equipment.The debugging on-line certificated that the system can realize the purpose of regulating speed reversible without circulating current and has high stability,reliability and rapidity.There is realistic significance to the transformation of the traditional equipment.