Chapter 5 Function parameter
85
Torque limit source under speed
control mode
Function code F5.08 setting
Panel potentiometer setting
Upper limit digital setting for lower
torque under speed control mode
In speed control mode, the maximum value of inverter output torque is controlled by the
torque upper limit source.
F5.07 is used to select the setting source of torque upper limit, when it is set by analog, high-
speed pulse or communication, the set 100% corresponds to F5.08, the 100% of F5.08 is the
inverter's rated torque.
Vector control differential gain
For the sensorless vector control, the parameter can be used to adjust the motor speed and
stability: if the speed of motor with load is low, increases the parameter and vice versa decreases.
Speed loop filter time constant
Under vector control mode, properly increases the filter time when speed fluctuate wildly; but
do not excessively increases, or the lag effect will cause shock.
Vector control overexcitation gain
In the process of the inverter's deceleration, the over-excitation control can suppress the rise
of bus voltage to avoid overvoltage fault. The greater overexcitation gain, the stronger the
inhibitory effect.
For the occasions that the inverter's deceleration easily cause over pressure alarm , the
overexcitation gain needs to be improved. But if overexcitation gain is too large, which easily lead
to the increase of output current, you need to weigh in practical applications.
For the small inertia occasions that the inverter's deceleration will not cause voltage rise, it is
recommended to set overexcitation gain as 0; the set value is also suitable for the occasions with
braking resistor.
Excitation regulator proportional gain
Excitation regulator integral gain
Torque regulator proportional gain
Torque regulator integral gain
The regulator parameters of vector control current loop PI, the parameter will be obtained
automatically after performing asynchronous motor parameters comprehensive auto tunning or
synchronous motor parameters comprehensive auto tunning and generally do not need to modify it.
It is reminded that the dimension that this current loop integral gain adopted is not the
integration time, but the direct set integral gain. Therefore, if the setting of current loop PI gain is
too large, which may cause the oscillation of entire control loop, in the event of oscillation, you
can manually reduce PI proportional gain and integral gain.
5-2-8.Keyboard and display: F6.00-F6.19
STOP/RESET key is enabled only
under keyboard operation mode
STOP/RESET key is enabled under
any operation mode
Running status display
parameters 1
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