351A3445P001 GE

IB ST ZF 24 AI 4/SF-2750620 PHOENIX
2961192 PHOENIX
R-S108V01-16-24VDC-C10-1 PHOENIX
CB6687-2L PILLAR
P1U-1NB PILZ
301140 PILZ
311041 PILZ
PM1253AL-6-3-Z03 PIONEER MAGNETICS
PM3398BP-6-1-3-E PIONEER MAGNETICS
PM3328BP-6 PIONEER MAGNETICS
PM3398BP-6-1-3-E PIONEER MAGNETICS
PM3328B-6-1-3-E PIONEER MAGNETICS
PRD2-200 POLYSPED
PCIH38F300A1 POSITRONIC

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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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