Sanken S06-4A005-B Instruction Manual page 81

Note 1: The flying start function may not be effective when the capacity of the inverter is much larger than that of the motor or
when the free-running speed of the motor is very low or in an environment tends to be disturbed.
Note 2: If the inverter starts a free-running motor with a low frequency, an excessive current may be generated and trip the circuit
breakers. Thus, whether current startup will cause impact can be determined not only by checking the rotation speed but
also the direction of rotation. This function can start the motor in a predetermined rotation direction without any shock
even when the motor is free-running in reverse, for example due to a back wind.
Motor rotation direction
FR (Forward run)
RR (Reverse run)
Output frequency
Note 3: In feedback control such as PID control etc., it is possible that the speed tracking does not happen when configuring the
gain setting value or when affected by response speed of the system.
F1103 Starting frequency
The inverter starts to operate with this frequency. If the set frequency is lower than starting frequency, the inverter does not start.
Code No. Function Name
F1103 Starting frequency
Example 1) When setting F1103=20Hz for 50Hz operation, if operation signal is turned on, the inverter outputs 20Hz as the output
frequency, and then goes up to 50Hz according to the specified acceleration slope.
Example 2) When setting F1103=20Hz for 15Hz operation, if operation signal is turned on, the inverter remains in standby and does
not output.
● Once the inverter starts, it continues to run even if a frequency lower than the starting frequency (but higher than operation start
frequency) is set..
● When inputting a stop signal, if the output frequency is below starting frequency, the inverter will stop outputting. (When DC
braking function is disabled).
Operation start frequency
F1104
This frequency value is used to determine whether the inverter can operate or not.
Code No. Function Name
F1104 Operation start frequency
● If the set frequency equals or exceeds the levels of the operation start frequency and the starting frequency, the inverter starts
operating at the starting frequency. And, if a frequency below the operation start frequency is set during operation, the inverter
enters a standby state. And the output frequency drops to the starting frequency and then output stops. In this case, the operation
mode indicator on the operation panel flashes, indicating the standby state. This function is useful for starting or stopping the
inverter using only an external frequency command.
Example) F1104=20Hz, F1002=3 for the frequency setting using the quick knob. By adjusting the quick knob, the output starts
when the command frequency is 20Hz or higher. At a frequency lower than 20Hz, the output frequency goes down to the
starting frequency, and output stops.
Braking mode= free-running stop (F1111=3)
Forward run Free running
Reverse run
Forward run
Reverse run
0.05～60Hz
0～20Hz
Decelerating to stop (speed tracking)
Same with normal starting
In normal
acceleration
Data Content
Data Content
- 80 -
Setting Resolution Factory Presets
0.01Hz
Setting Resolution Factory Presets
0.01Hz
1
1