EM8 User's Manual
5.The Concrete Explanation of Function Parameters
46
Remark
● Torque boost setting value is too high, may appear over current protection, or cannot start normally.
Code
Name
Description
Factory setting
b-2
Torque boost mode
0: Manual
1: Auto
0
0: Manual boost: Torque boost voltage entirely set by parameter [b-1], which is characterized by the
fixed
boosted voltage, light-load motor easily meets magnetic saturation.
1: Automatic torque boost
:
Torque boost voltage is changed with the stator current, the stator current is
the greater the boosted voltage is greater.
Automatic torque boost can prevent the motor at light load improved over voltage cause the magnetic
saturation, thereby avoiding motor overheat phenomenon operating at a low frequency.
Code
Name
Description
Factory setting
b-3
Upper limit frequency
Lower limit frequency ~500.0 Hz
50.00
(fu) represents frequency upper limit value in following description:
Code
Name
Description
Factory setting
b-4
Lower limit frequency
0.0~Upper limit frequency
0.50
b-5
Lower limit frequency
running mode
0: Stop
1: Run as the lower-limit frequency
0
(f
L
) represents frequency upper limit value in following description:
When the actual setting frequency is less than the frequency lower limit, inverter will reduce the output
frequency, arrived at the lower frequency, according to the lower limit running mode to determine the
steady output. If the lower frequency running mode selection for 0 (stop mode), inverter will continue to
reduce the output frequency to stop, if lower frequency running mode selection 1 (running mode), inverter
will run according to the frequency of lower limit.
Under the stop mode ([b-5] = 0) , the inverter work at the lower frequency mode as shown in diagram 5-12:
Diagram 5-12: The lower limit frequency running mode under Stop mode ([b-5]=0)
Code
Name
Description
Factory setting
b-6
Start mode
0: Start up from start freq
1: First brake, then restart
2: Speed inspection startup
0
