Sanken SVCO6, Instruction Manual, Page: 185 / 326

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7
7-3 Description of Functions
V·f separation function
F2001 V
•
f separation function selection
F2002 V
•
f separation command voltage
V
•
f separation function is based on V/f control mode, it can separately control the output frequency and output voltage of
the switcher. A complete separation and proportional separation can be selected by the function codes.
Code No. Function Name Data Content
Setting
Resolution
Factory
Presets
F2001 V•f separation function
selection
1
：
V•f proportional separation
2
：
complete separation
1 1
F2002 V•f separation command
voltage
0
：
no function (command is given by VIF1)
0.01
-
10.00V
0.01V 0
By setting the V
•
f separation control F1001=40, the ―V
•
f separation function‖ is effective.
1) Related control terminals on the inverter
Mark Control terminals on inverter
VIF1 Voltage command input terminal
+V Potentiometer connecting terminal
ACM1 or ACM2 Analog signal common terminal
2) Input method of frequency & voltage command

The frequency command (F1002) is selected according to speed 1, the setting can be made on the operation
panel and from external.
Note: If frequency command F1002 is iteratively set with VIF1 external analog, it will conflict with the output voltage
command during V•f separation. Therefore, the iterative setting of the VIF1 terminal should be avoided.

The output voltage command can input the DC voltage (0
-
10V) into the external control terminals ―VIF1‖ and
―ACM1‖ or ―ACM2‖ on the inverter and input voltage into ―VIF1‖ from internal power supply ―+V‖ and
external potentiometer. For the external potentiometer, please refer to the connection and correct installation of
control circuit terminals.
(Parameters of external potentiometer: resistance =5kΩ, capacity=over 0.3W.)

The output voltage command can input the 0
-
10V voltage into VIF1 and set the V•f separation command
voltage: correspond to VIF1 command voltage in F2002. When the command voltage is set by function code,
please set the V/f separation command voltage: F2002≠0.
3) Gain of output voltage command
①
V•f proportional separation (F1001=40 & F2001=1)

In normal V/f pattern, the voltage command Vin for current frequency is gained through the external
control terminal ―VIF1‖ inputs (0
-
10V), and the output voltage command is sent to the inverter. There is a
proportion between the frequency command and the voltage command. However, the proportion is changed
with the changes of VIF1 inputs.
The relationships between VIF1 voltage input and gain coefficient are as follows:
Gain coefficient
VIF1=0V input
，
Vout = Vin – (Vin×100%) = 0[V]
=5V input
，
Vout = Vin + (Vin×0%) = Vin[V]
=10V input
，
Vout = Vin + (Vin×100%) = 2Vin[V]
Vin= Current voltage command
Vout= Voltage command after processing