S7—200在循环水冷却塔风机自动控制中的应用

摘要

采用S7-200PLC、HMI，配合温度传感器及变频器，实现了多台循环水冷却塔风机成组自动控制，完全不需要人工干预，能实现友好的人机信息互换，节能效果显著。%ST-200PLC, HMI, temperature sensor and inverter are used to implement the automatic control of several cooling tower fan of circulating water. The friendly man-machine information exchange is implemented. The energy-saving effect is remarkable.