Machine Protection; Preventing Motor Stalling During Operation - YASKAWA Varispeed E7 Instruction Manual And Parameter Description

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 constant L3-06 for 100 ms or longer, the motor
speed is reduced. Set whether to enable or disable the stall prevention using constant 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 Constants
Con-
stant
Number
Stall prevention selection during
L3-05
running function selection
Stall prevention level during run-
L3-06
ning
-30
6
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Name
0: Disabled (Operates according to the setting. Motor
may stall when the load is too large.)
1: Enabled--Deceleration time 1 (Deceleration time set in
C1-02 is used.)
2: Enabled--Deceleration time 2 (Deceleration time set in
C1-04 is used.)
Enabled when L3-05 is set to 1 or 2. Set as a percentage,
taking Inverter rated current to be 100%.
Normally, there is no need to change this setting.
Lower the set value if the motor stalls at the factory set-
ting.
Setting
Description
Range
0 to 2
30 to 200
Change
Factory during Access
Setting Opera- Level
tion
1 No A
120% No A