Sanken SVCO6, Instruction Manual, Page: 198 / 326

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7-3 Description of Functions
Disturbed operation function(F2201=2)
Disturbed operation function (F2201=2)
F2236 Disturb modulation analog input switching
F2237 Disturb modulation rate
● The function to periodically set the frequency change and repeat the actions through the pre-set
acceleration/deceleration time. According to the difference between the shaft diameters of front end and terminal end,
it is effective for the system desiring to change the rotating speed.
● For the frequency set in disturbed operation, since it is freely modulated according to external analog command, the
setting value of repeated frequency can be adjusted in conjunction with load status.
Code
No.
Function Name Date Content
Setting
Resolution
Factory
Presets
F2236 Disturb modulation
analog input switching
0: No analog input
1: External analog VIF1 voltage (0-5V)
2: External analog VIF1 voltage (0-10V or potentiometer)
3: External analog VIF2 voltage (0-5V)
4: External analog VIF2 voltage (0-10V or potentiometer)
5: External analog VIF3 voltage (0-5V)
6: External analog VIF3 voltage (0-10V or potentiometer)
7: External analog VIF1 current (4-20mA)
8: External analog VIF2 current (4-20mA)
9: External analog VIF3 current (4-20mA)
1 0
F2237 Disturb modulation rate 0-50% 1% 0
1) Use of inverter terminal
Control terminal Content Function code setting
VIF1-VIF3 Modulation signal input F2236
ACM1, ACM2 Analog signal common terminal
2) Basic actions of disturbed operation
● Please set F2201=2 (disturbed operation). No matter what is the control mode of the motor, the disturbed
operation is always effective.
● Since there are two settings of frequency value, it must be set according to 1st speed frequency (F2101) and
2nd speed frequency (F2102).
● When an operation command is input, the both frequencies will be repeated with a sequence of 1st speed
frequency→2nd speed frequency→1st speed frequency…Also, when output frequency reaches the preset
frequency, in order to prevent twining, an increase/decrease (
△
F) will be made to the instantaneously set
frequency. When 1st speed frequency is reached, 8th speed frequency (F2108) will be used to subtract the
preset frequency from 1st speed frequency; when 2nd speed frequency is reached, this value will be added to
act as the set frequency.
The next set frequency when 1st speed frequency is reached→1st speed frequency – 8th speed frequency
(
△
F).
The next set frequency when 2nd speed frequency is reached→2nd speed fre 8th speed frequency
(
△
F).
● For start (from operation command ON to the 1st speed frequency is reached) and stop (from stop command
ON to stop) of the acceleration and deceleration time during disturbed operation, the frequency is changed
through 1st acceleration/deceleration time, furthermore, it can also be changed through 2nd
acceleration/deceleration time.