140DDO88500 SCHNEIDER 现货

EE-4583-050
EE-4583-401
EE-4583-402-001
EE-4596-211-009 210-000
EE-4596-223-018
EE-4696-212-012
EE-4696-224-018
EE-4696-253-012
EE-4696-256-012
EE-4696-365-001

分类:

描述

PLC(MR型或MT型)的输出点、COM点直接与变频器的STF(正转启动)、RH(高速)、RM(中速)、RL(低速)、输入端SG等端口分别相连。PLC可以通过程序控制变频器的启动、停止、复位;也可以控制变频器高速、中速、低速端子的不同组合实现多段速度运行。但是,因为它是采用开关量来实施控制的,其调速曲线不是一条连续平滑的曲线,也无法实现精细的速度调节。这种开关量控制方法,其调速精度无法与采用扩展存储器通讯控制的相比。

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