EM12 User’s Manual
5. Description of Function Codes
73
may occur.
If the overvoltage stall gain is set to 0, the overvoltage stall function is disabled. The overvoltage stall protective
voltage setting 100% corresponds to the base values in the following table:
Voltage Class
Corresponding Base Value
Single-phase 220 V
290 V
Three-phase 220 V
290 V
Three-phase 380 V
530 V
Three-phase 480 V
620 V
Three-phase 690 V
880 V
bb-06
Over current stall gain
Default
20
Setting Range
0~100
bb-07
Over current stall protective current
Default
180%
Setting Range
100%~200%
Over current stall: When the output current exceeds the over current stall protective current (bb-07) during
acceleration/deceleration of the frequency inverter, the frequency inverter stops acceleration/deceleration and keeps
the present running frequency. After the output current declines to below bb-07, the frequency inverter continues to
accelerate/decelerate.
bb-07 (over current stall protective current) is used to select the current protection value of over current stall function.
This function will be carried out by frequency inverter, when the current exceeds bb-07. This value is the percentage
of motor rated current.
bb-06 (over current stall gain) is used to adjust the over current suppression capacity of the frequency inverter. The
larger the value is, the greater the over current suppression capacity will be. In condition of no over current
occurrence, should set bb-06 to a small value.
For small-inertia load, the value should be small. Otherwise, the system dynamic response will be slow. For
large-inertia load, the value should be large. Otherwise, the suppression result will be poor and over current fault may
occur. If the over current stall gain is set to 0, the over current stall function is disabled.
Diagram 5-23 Diagram of the overcurrent stall protection function
Summary of Contents for EM12 Series
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