Sanken SVCO6, Instruction Manual, Page: 127 / 326

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7-3 Description of Functions
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In the F1106, if a value other than 0 is set, when the frequency set by F1107 is reached by acceleration, the
frequency increase can be locked only by using the time set by F1106 (output frequency standby)
Note 1: This function is inactive when the acceleration/deceleration curve is S-shaped curve (F1010 = 2).
Note 2: If the starting frequency setting is higher than standby frequency, use the starting frequency to realize standby.
Note 3: If target frequency is lower than the standby frequency, standby action will not be executed.
Note 4: Standby action will not be executed during deceleration.
Target frequency
During deceleration
During acceleration During acceleration
Standby frequency
Standby time Standby time
Starting frequency
F1103 Time
F1108 Restart after momentary power failure
Whether the inverter resumes operation after it stops due to a momentary power failure can be specified using this
function. This function works properly only after a momentary power failure. If the duration of the power failure is longer,
correct action can not be made as the control power supply is lost, as shown in the following table.
Code No. Function Name Data Content Setting Resolution Factory Presets
F1108 Restart after momentary
power failure
0: Do not restart
1: Restart
2: Compensation for
momentary power failure
1 0
F1108
Short time power failure (momentary failure) Long power failure (Re-start of the inverter)
Operation
panel
External terminals
Operation
panel
External terminals
Operation signal
No operation
signal
Operation signal No operation signal
0: No restart No restart No restart No restart No restart Restart No restart
1: Restart Restart
※
1 Restart
※
1 No restart No restart Restart No restart
2: Restart Restart
※
1 Restart
※
1 No restart No restart Restart No restart
The restart marked with
※
1 means that the inverter starts in the flying start mode after a momentary power failure.
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When ―F1108=2‖ is selected, the Momentary Power Failure Compensation function is enabled to prolong the
operation time of the inverter even in the event of a power failure. The Momentary Power Failure Compensation
function detects a drop in the input voltage, and reduces the output frequency and voltage of the inverter before any
alarm trip, and uses the energy regenerated from the motor to keep it operating for longer.
Note 1: The Momentary Power Failure Compensation function works when F1001: the motor control mode is V/f control
or speed control (F1001=1, 2, 3).
Note 2: While the Momentary Power Failure Compensation function is working, the output frequency of the inverter is
reduced. Use this function for loads, of which the frequency reduction is allowable.
Note 3: Restart after momentary power failure for F1108 = 2 has the same ―restart‖ effect as for F1108 = 1.
Note 4: In the PID control, sometimes the Momentary Power Failure Compensation function can not be fully functional
as a result of the effects of PID gain setting value and the system response speed.
Note 5: Output voltage AVR function is needed to execute the Momentary Power Failure Compensation function in V/f
control mode. Therefore, to use this function, please set the base voltage to F1005≠0
.
F1107
F1106
F1106