Chapter 4 Parameters
4-52
0 1.0 5
0 1.0 3
0 1.0 1
0 1.06
0 1.0 4
0 1.0 2
0 1.0 0
V/f Curve
Vol tage
F requenc y
Mid-point
F req.
(F mid)
Maximum
Output
F requenc y
Maximum
Output
Vol tage
( Vbas e)
Mid-point
Vol tage
( Vmid)
Minimum
Output
Vol tage
(V min)
Minimum
Output
F req.
(F min)
Maximum Voltage
F requenc y
(F base)
01.07
Output Frequency Upper Limit
Unit: %
Settings 0.1 to 120.0%
Factory Setting: 110.0
This parameter must be equal to or greater than the Output Frequency Lower Limit (Pr.01.08).
The Maximum Output Frequency (Pr.01.00) is regarded as 100%.
Output Frequency Upper Limit value = (Pr.01.00 * Pr.01.07)/100.
The max. output frequency of the AC motor drive will be limited by this setting. If the setting of
frequency command is greater than Pr.01.07, the output frequency will be equal to or less than
Pr.01.07.
When enabling Pr.07.03 or Pr.10.00~10.13, the output frequency of the AC motor drive may
exceed the frequency command but it is still limited by this setting.
Related parameters: Pr.01.00(Maximum Output Frequency (Fmax)) and Pr.01.08(Output
Frequency Lower Limit).
01.08
Output Frequency Lower Limit
Unit: %
Settings
0.0 to 100.0%
Factory Setting: 0.0
The Output Frequency Lower Limit value = (Pr.01.00 * Pr.01.08) /100.
This setting will limit the min. output frequency of the AC motor drive. When the frequency
command of the AC motor drive or the frequency calculated by feedback control is less than
this setting, the output frequency of the AC motor drive will be limited by this setting.
After starting running, the AC motor drive will accelerate from Pr.01.05 (Minimum Output
Frequency (Fmin) (Motor 0)) to the setting frequency by V/f curve and won’t be limited by this
setting.
The Upper/Lower Limits are to prevent operation faults and machine damage.
If the Output Frequency Upper Limit is 50Hz and the Maximum Output Frequency is 60Hz, the
Output Frequency will be limited to 50Hz.
If the Output Frequency Lower Limit is 10Hz, and the Minimum Output Frequency (Pr.01.05) is
set to 1.0Hz, then any Command Frequency between 1.0-10Hz will generate a 10Hz output
from the drive. If the command frequency is less than 1.0Hz, drive will be in ready status
without output.
This parameter must be equal to or less than the Output Frequency Upper Limit (Pr.01.07).
