Sanken SVCO6, Instruction Manual, Page: 114 / 326

- 112 -
7-3 Description of Functions
Note: The inverter can not output a voltage higher than the input voltage. Therefore, the automatic regulation range
specified by this function is a range of maximum possible output range determined by input voltage. For example,
F1005= 460V may be set even if used in a 400V class distribution system. However, such a setting will only serve to
make the V/f pattern steeper, the actual output voltage can not reach 460V.
F1007 Upper frequency limit
F1008 Lower frequency limit
Set the upper and lower limits of the output frequency.
Code No. Function Name Data Content Setting Resolution Factory Presets
F1007 Upper frequency limit 5-599Hz 0.01Hz 60
F1008 Lower frequency limit 0.05-200Hz 0.01Hz 0.05
●
Because misoperation of the operation panel or wrong actions of external frequency command signals may cause
over frequency, these functions are used for protection of possible speed range required by the mechanical side.
●
Although a target frequency setting may exceed the upper frequency limit, the output frequency can not rise to a
value higher than the upper frequency limit.
●
Although a target frequency setting may be below the lower frequency limit, an output frequency lower than the
lower limit is not actually output in constant speed operation.
●
In case of lower frequency limit setting, please set it with a value greater than the starting frequency (F1103) and the
operation start frequency (F1104).
Note 1: In vector control mode, the maximum limit of the upper frequency limit is 240Hz. (For 2-pole motor, the
maximum limit is 120Hz.)
Note 2: In speed sensorless vector control mode, the minimum limit of the lower frequency limit is 0.2Hz.
F1009 Carrier frequency adjustment
A function for setting carrier frequency of the inverter.
Code No. Function Name Data Content Setting Resolution Factory Presets
F1009 Carrier frequency
adjustment
0-130 1
※
※
The representative parameters that are suitable for various models have been input.
●
As the value increases, the carrier frequency becomes higher. But, the maximum carrier frequency automatically
varies depending on the operating status and motor capacity.
Note 1 : If the carrier frequency becomes low, the carrier noise from the motor will increase, but the leak current flowing to
earth will decrease.
Note 2 : Raise the setting value of carrier frequency where the inverter is used in high frequency output applications.
O
u
tp
u
t
fr
eq
u
en
cy
Upper frequency limit
Lower frequency limit
Frequency setting signal