Frequency Limit Using Upper and Lower Limit Frequencies - Setting Details
Ad.24 Freq Limit
The initial setting is 0(No). Changing the setting to 1(Yes) allows the setting of
frequencies between the lower limit frequency (Ad.25) and the upper limit
frequency (Ad.26). When the setting is 0(No), codes Ad.25 and Ad.26 are not
Ad.25 Freq Limit Lo,
Ad.26 Freq Limit Hi
Set an upper limit frequency to all speed unit parameters that are expressed in
Hz or rpm, except for the base frequency (dr.18). Frequency cannot be set
higher than the upper limit frequency.
4.18.3 Frequency Jump
Use frequency jump to avoid mechanical resonance frequencies. Jump through frequency bands
when a motor accelerates and decelerates. Operation frequencies cannot be set within the pre-set
frequency jump band.
When a frequency setting is increased, while the frequency parameter setting value (voltage,
current, RS-485 communication, keypad setting, etc.) is within a jump frequency band , the
frequency will be maintained at the lower limit value of the frequency band. Then, the frequency
will increase when the frequency parameter setting exceeds the range of frequencies used by the
frequency jump band.
Ad
28
Jump frequency
lower limit1
Jump Lo 1 10.00
0.00–Jump frequency upper
limit 1
Hz