Detailed Function Description
75
Figure 6.28 Over-voltage stall function.
Function
Code
Name Description Setting Range Factory Setting
PB.06
Auto current
limiting threshold
50~200% 50~200
G Model: 160%
P Model: 120%
PB.07
Frequency
decrease rate
when current
limiting
0.00~100.00Hz/s 0.00~100.00 10.00Hz/s
Auto current limiting is used to limit the current of inverter smaller than the value
determined by PB.06 in real time. Therefore the inverter will not trip due to surge
over-current. This function is especially useful for the applications with big load inertia or
step change of load.
PB.06 is a percentage of the inverter’s rated current.
PB.07 defines the decrease rate of output frequency when this function is active. If PB.06
is too small, overload fault may occur. If it is too big, the frequency will change too sharply
and therefore, the feedback energy of motor will be too large and may cause over-voltage
fault. This function is always enabled during acceleration or deceleration.
Notice:
During auto current limiting process, the inverter’s output frequency may
change; therefore, it is recommended not to enable the function when
requires the inverter’s output frequency stable.
During auto current limiting process, if PB.06 is too low, the overload
capacity will be impacted.
Please refer to following figure.
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