5-62
F codes
E codes
C codes
P codes
H codes
A codes
b codes
r codes
J codes
d codes
U codes
y codes
Chap. 5 FUNCTION CODES
Torque limiter (Operating conditions) (H73)
H73 specifies whether the torque limiter is enabled or disabled during acceleration/deceleration and running at constant
speed.
Data for H73 During accelerating/decelerating During running at constant speed
0 Enable Enable
1 Disable Enable
2 Enable Disable
The torque limiter and current limiter are very similar function each other. If both are activated concurrently,
they may conflict each other and cause hunting in the system. Avoid concurrent activation of these limiters.
F42 Drive Control Selection 1 H68 (Slip Compensation 1 (Operating conditions))
F42 specifies the motor drive control.
Data for
F42
Drive control Basic control Speed feedback Speed control
0 V/f control with slip compensation inactive Frequency control
1
Dynamic torque vector control
(with slip compensation and auto torque boost)
2 V/f control with slip compensation active
Disable
Frequency control
with slip compensation
3 V/f control with speed sensor
4 Dynamic torque vector control with speed sensor
V/f control
Enable
Frequency control
with automatic speed
regulator (ASR)
5 Vector control without speed sensor
Estimated speed
6 Vector control with speed sensor
Vector control
Enable
Speed control
with automatic speed
regulator (ASR)
V/f control with slip compensation inactive
Under this control, the inverter controls a motor with the voltage and frequency according to the V/f pattern specified
by function codes. This control disables all automatically controlled features such as the slip compensation, so no
unpredictable output fluctuation, enabling stable operation with constant output frequency.
V/f control with slip compensation active
Applying any load to an induction motor causes a rotational slip due to the motor characteristics, decreasing the motor
rotation. The inverter’s slip compensation function first presumes the slip value of the motor based on the motor torque
generated and raises the output frequency to compensate for the decrease in motor rotation. This prevents the motor
from decreasing the rotation due to the slip.
That is, this function is effective for improving the motor speed control accuracy.
Function code Operation
P12 Rated slip frequency Specify the rated slip frequency.
P09 Slip compensation gain for driving
Adjust the slip compensation amount for driving.
Slip compensation amount for driving =
Rated slip x Slip compensation gain for driving
P11 Slip compensation gain for braking
Adjust the slip compensation amount for braking.
Slip compensation amount for braking =
Rated slip x Slip compensation gain for braking
P10 Slip compensation response time
Specify the slip compensation response time.
Basically, there is no need to modify the default setting.
To improve the accuracy of slip compensation, perform auto-tuning.
H68 enables or disables the slip compensation function according to the motor driving conditions.
Motor driving conditions Motor driving frequency zone
Data for H68
Accel/Decel
Constant speed Base frequency or below Above the base frequency
0 Enable Enable Enable Enable
1 Disable Enable Enable Enable
2 Enable Enable Enable Disable
3 Disable Enable Enable Disable
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