5.3 Description of Function Codes 5.3.1 F codes (Fundamental functions)
Speed sensorless vector control/Vector control 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 reference speed or actual speed (specified by F38 under vector control with speed sensor only) reaches the
stop frequency specified by F25.
Specifying the holding time for the starting frequency compensates for the delay time for the establishment of a
magnetic flux in the motor; specifying that for the stop frequency stabilizes the motor speed at the stop of the inverter.
If using a configuration for which it is necessary to pull in the magnetic pole position under vector control with speed
sensor (permanent magnet synchronous motors), an operation different from this operation is performed. It is not
possible to ensure sufficient torque when the motor starts at this time. Refer to the description for function code
P30.
Starting frequency 1 (F23)
F23 specifies the starting frequency at the startup of an inverter.
• Data setting range: 0.0 to 60.0 (Hz)
Starting frequency 1 (Holding time) (F24)
F24 specifies the holding time for the starting frequency 1.
• Data setting range: 0.00 to 10.00 (s)
Stop frequency (F25)
F25 specifies the stop frequency at the stop of the inverter.
• Data setting range: 0.0 to 60.0 (Hz)
Stop frequency (Holding time) (F39)
F39 specifies the holding time for the stop frequency.
• Data setting range: 0.00 to 10.00 (s)
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