Machine Protection
6-29
Machine Protection
Preventing Motor Stalling During Operation
Stall prevention during operation prevents the motor from stalling by automatically lowering the Inverter's
output frequency when a transient overload occurs while the motor is operating at a constant speed.
If the Inverter output current continues to exceed the setting in parameter L3-06 for 100 ms or longer, the
motor speed is reduced. Set whether to enable or disable the stall prevention using parameter L3-05. Set the
according deceleration times using C1-02 (Deceleration time 1) or C1-04 (Deceleration Time 2).
If the Inverter output current reaches the set value in L3-06 – 2%, the motor will accelerate again to the set fre-
quency.
Related Parameters
Parameter
Number
Name
Setting
Range
Factory
Setting
Change
during
Operation
Access
Level
L3-05
Stall prevention selection during running function
selection
0 to 2 1 No A
L3-06 Stall prevention level during running 30 to 200 120% No A
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