Detailed Function Description
100
Function
Code
Name Description
Setting
Range
Factory
Setting
PB.11
Over-current
protection
0: Disabled
1: Enabled
0~1 1
PB.12
Over-current stall
threshold
100~200% 100~200 160%
PB.13
Frequency decrease
rate
0.00~50.00Hz/s 0.00~50.00 1.00Hz/s
During acceleration of inverter, the actual motor speed rise rate may lower than the
output frequency rise rate because of too big load. If no measures to take, inverter will
trip caused by over-current.
The principle of over-current protection is to detect the output current of inverter during
inverter operation and compare it with over-current stall threshold determined by PB.12.
If it exceeds the value of PB.12 during acceleration, inverter will remain output frequency;
if it exceeds the value of PB.12 during constant speed running, inverter will decrease
output frequency. When output current of inverter is lower than the value of PB.12,
inverter will continue to accelerate until output frequency reach frequency reference.
Please refer to following diagram.
Figure 6.38 Over-current stall function.
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