Acceleration and Deceleration Characteristics
6
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19
Preventing the Motor from Stalling During Acceleration (Stall Prevention During
Acceleration Function)
The Stall Prevention During Acceleration function prevents the motor from stalling if a heavy load is applied
to the motor or sudden rapid acceleration is performed.
If you set L3-01 to 1 (enabled) and the Inverter output current exceeds the -15% level of the set value in L3-
02, the acceleration rate will begin to slow down. When L3-02 is exceeded, acceleration will stop.
If you set L3-01 to 2 (optimum adjustment), the motor current accelerates to the value set in L3-02. With this
setting, the acceleration time setting is ignored.
Related Parameters
Param-
eter-
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Access
Level
LCD Display
L3-01
Stall prevention selection dur-
ing acceleration
0: Disabled (Accelerates according to the setting. Motor
may stall if the load is too high.)
1: Enabled (Acceleration stops when the level set in L3-
02 is exceeded. Acceleration continues when current
value is reduced.)
2: Optimum adjustment (Adjusts acceleration using the
level set in L3-02 as the standard. The acceleration
time setting is ignored.)
0 to 2
1
No
A
StallP Accel Sel
L3-02
Stall prevention level during
acceleration
Set as a percentage taking the Inverter rated current to be
100%.
Normally, it is not necessary to change this setting. Lower
the set value if the motor stalls using the factory setting.
0 to 200
120%
No
A
StallP Accel Lvl
