*种利用外接电位器进行频率设置,FR-500系列变频器的10端子提供标准的10V直流电压,2端子是频率设定输入端,5端子是模拟量输入公共端子。通过调整外接电位器R的2端输出电压,改变了变频器2端的输入电压值,也就改变了变频器的频率设定值,达到了频率设置的目的,该方法有以下优点:
(3) 安装灵活,可以根据实际需要,将外接电位器安装到任何位置,进行远距离操作。
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