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  • No : 21525
  • Release Date : 2018/08/22 16:28
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FR-E520 operation mode (Pr.79) selection

Normally, I use the panel potentiometer to vary the frequency. However, once I use the operation panel button to change the frequency (for fine tuning), the potentiometer becomes unavailable for setting the frequency.
Do I have to set the parameter again to enable the potentiometer for setting the frequency?
How can I use both the operation panel potentiometer and frequency setting button?
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Answer

The FR-E500 manufactured before May 1998 behaved as you mentioned, and the potentiometer becomes unavailable once you set the frequency on the operation panel.
Since the operation panel has a built-in potentiometer, you can use this built-in potentiometer and digital way (UP/DOWN key) to set the frequency.  
However, since it is not clear which setting value should be used with the inverter, the following condition is provided.   
To enable the built-in potentiometer, the digital frequency setting must be 0 Hz.
Therefore, while the digital frequency is set, the potentiometer is disabled.

If you press the UP (or DOWN) key while operating the inverter with the built-in potentiometer, the current potentiometer operation command is reflected on the setting value of the digital frequency, the potentiometer is disabled according to the condition above. (To enable the potentiometer again, set the digital frequency to 0 Hz.)
There is no method to individually disable the built-in potentiometer and UP/DOWN key.
Also, you cannot use the potentiometer on the operation panel and digital frequency setting simultaneously.  

Starting from the FR-E500 manufactured in June 1998 and later, the new parameter Pr.146 (Frequency setting command selection) allows for enabling and disabling the built-in potentiometer and digital frequency setting value.
Determine if your FR-E500 is the upgraded version from the following serial number.

A 8 6 ○○○○○○  
Made in June 1998
Product Name
Inverter, magnet motor drive
Product Category
Inverter
Series
FR-E500

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