Sanken SVCO6, Instruction Manual, Page: 244 / 326

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7-3 Description of Functions
F6017 Starting torque
F6018 Starting torque duration time
F6119 Lower torque limit value in speed
limiting
This function is used to separately set the starting torque command value for torque control in vector control mode
(speed sensor and speed sensorless). It is used in the occasions when the motor cannot start because the command value
is too small. Furthermore, it can set the lower torque limit value (as the speed limit value) (F6119) in speed limiting.
However, the starting torque (F6017) and starting torque duration time (F6018) will share the same function code in
speed control.
Code No. Function Name Date Content
Setting
Resolution
Factory
Presets
F6017 Starting torque 0-100% 0.1% 30
F6018 Starting torque duration time 0-6500 second(s) 0.1s 1
F6119 Lower torque limit value in speed limiting 0-100% 0.1% 30

The starting torque setting value (F6017) is a ratio related to rated torque.

When torque control is started at the status of motor stop or low-speed running below 20Hz, it will be effective
from the beginning to starting torque duration time (F6018). However, when it is started during the status of
high-speed running (20Hz and above), the torque will be controlled according to the normal torque command
value even when the starting torque setting is effective.

During running with starting torque, the starting torque setting value will become into torque command when the
torque is smaller than the starting torque setting value. But during running of starting torque, the torque will be
controlled according to the torque command value when torque command value is larger than starting torque.

After the starting torque duration time is finished, the torque will be controlled according to the command value.
During this time, the torque command value is effective even when the command value is smaller than the setting
value of starting torque.

When any function code of F6017 or F6018 is set to 0, the starting torque is noneffective. The torque will be
controlled according to the torque command value from the beginning of the operation.

During torque control mode (F1001=4 or 5) and the speed is controlled by speed limit value, the settings of F6119
will be used for torque control when torque command value is smaller than the settings of F6119. Contrarily, the
torque command value will become into the torque limit value in speed control.

In the torque control when speed limit value is not reached, the setting value of F6119 is noneffective; the torque
command can be set from the beginning of 0%.

During running with starting torque, the lower torque limit value in speed limiting (F6119) is effective as the
torque limit value when speed limiting value is used for speed control.

When speed control is not stable in the speed limiting with the initialized value, please enlarge the setting values of
F6119.
Note 1: If the setting value of starting torque is set too large, the motor may accelerate rapidly. Therefore, please set the
starting torque carefully.
Note 2: If the lower torque limit in speed limiting (F6119) is too small, the speed control under speed limiting may be
unstable. Therefore, sufficient allowance must be remained for the setting value.
Speed limit value
Torque command
Starting torque mode
Torque control
Torque command = F6017
Speed curve
Speed control
using speed limit value
Torque limit value = F6119
(F6119 will prevail even under
starting torque mode)
Control according to
torque command
F6119
F6017
0s
t=F6018