VFD Contoller screen flashing numbers

Hi Everybody,
I have a 65mm spindle. The controller screen is flashing numbers like 172.0, 171.2. It keeps changing. The machine is powered up but not doing anything so I’m wondering what these numbers mean. The machine works fine, there is no issue. Just curious.

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I don’t know what those numbers mean either but if you press the >> button 3 times the display will cycle to Hz. There you’ll see the spindle RPM when it’s running. That’s a bit more interesting to see.

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