Sanken SVCO6, Instruction Manual, Page: 125 / 326

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7-3 Description of Functions
Operation signal
Frequency
equivalent to
the motor speed
Starting frequency
Time
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, by detecting ―the rotational direction‖ together not only the rotational speed, the motor
is now possible to start a shock less than ever before. 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.
Braking mode= free run stop (F1111=3)
Motor rotation direction
Free running Decelerating to stop (flying start)
Same with normal starting
In normal
acceleration
FR
(Forward run)
RR
(Reverse run)
Output frequency
Note 3: In feedback control such as PID control etc., it is possible that the flying start 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 Data Content Setting
Resolution
Factory Presets
F1103 Starting frequency 0.05-60Hz 0.01Hz 1
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).
t=0
F1102=2
F1102=1
O
u
tp
u
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fr
eq
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Forward run
Reverse run
Forward run
Reverse run