手动控制。电位器信号输入plc后,plc程序怎么处理才能输出到变频器?

2025-03-16 06:29:03
推荐回答(5个)
回答1:

你所说的2中方式我都做过,基于你公司的机器工作方式,我觉得用通讯的方式比较好,但是你一定要用模拟量来控制也是可以的,你在PLC中程序中控制4DA,让此模块输出0-5或0-10的模拟电压,然后将此模拟电压接到变频器上的COM和10V的端子上,然后通过设置变频器,用外部模拟电压控制频率,这样你的目的就达到了,你可以通过PLC对变频器的调速了,当然你也可以通过人机界面,(触摸屏,操作屏)来随时控制,变频器的频率了.

回答2:

如果PLC与变频器是以通信方式进行连接的,则可以将电位器的信号直接转换成频率写入变频器的控制字里面进行控制;如果是用模拟量通道控制的则直接把输入信号输出给模拟量通道就行了。

回答3:

可以通过PLC输出继电器的触点,来控制变频器控制端就可以了

回答4:

看变频器需要什么信号。有些有PWM。那就输出个脉宽信号。有要电压信号的就给个电压过去。也有要毫安电流的。

回答5:

这个要看你PLC是怎么控制变频器的罗
外部还是通讯
外部的话,就信号输入后直接驱动变频器接线的那个输出就OK了
通讯就要写通讯格式哦。

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