5-51
F23 to F25 Starting Frequency 1, Starting Frequency 1 (Holding time), Stop Frequency
F38 (Stop Frequency (Detection mode)) F39 (Stop Frequency (Holding time))
H92 (Continuity of Running (P) H93 (Continuity of Running (I)
d24 (Zero Speed Control)
Under V/f control
At the startup of an inverter, the initial output frequency is equal to the starting frequency 1 specified by F23. The
inverter stops its output when the output frequency reaches the stop frequency specified by F25.
Set the starting frequency to a level at which the motor can generate enough torque for startup. Generally, set the
motor's rated slip frequency as the starting frequency.
In addition, F24 specifies the holding time for the starting frequency 1 in order to compensate for the delay time for the
establishment of a magnetic flux in the motor. F39 specifies the holding time for the stop frequency in order to stabilize
the motor speed at the stop of the inverter.
Starting frequency 1 (F23) Data setting range: 0.0 to 60.0 (Hz)
F23 specifies the starting frequency at the startup of an inverter. Under V/f control, even if the starting frequency is set
at 0.0 Hz, the inverter starts at 0.1 Hz.
Starting frequency 1 (Holding time) (F24) Data setting range: 0.00 to 10.00 (s)
F24 specifies the holding time for the starting frequency 1.
Stop frequency (F25) Data setting range: 0.0 to 60.0 (Hz)
F25 specifies the stop frequency at the stop of the inverter. Under V/f control, even if the stop frequency is set at 0.0 Hz,
the inverter stops at 0.1 Hz.
Stop frequency (Holding time) (F39) Data setting range: 0.00 to 10.00 (s)
F39 specifies the holding time for the stop frequency.
If the starting frequency is lower than the stop frequency, the inverter will not output any power as long as the
reference frequency does not exceed the stop frequency.
Under vector control without/with speed sensor
At the startup, the inverter first starts at the “0” speed and accelerates to the starting frequency according to the
specified acceleration time. After holding the starting frequency for the specified period, the inverter again accelerates
to the reference speed according to the specified acceleration time.
The inverter stops its output when the detected speed or reference one (specified by F38) reaches the stop frequency
specified by F25.
In addition, F24 specifies the holding time for the starting frequency 1 in order to compensate for the delay time for the
establishment of a magnetic flux in the motor. F39 specifies the holding time for the stop frequency in order to stabilize
the motor speed at the stop of the inverter.
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