Acceleration and Deceleration Characteristics
6-17
Setting Example
The S-curve characteristic when switching operation (forward/reverse) is shown in the following diagram.
Fig 6.19 S-curve Characteristic during Operation Switching
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 L3-01 is set to 1 (enabled) and the Inverter output current reaches 85 % of the set value in L3-02, the accel-
eration rate will begin to slow down. When L3-02 is exceeded, the acceleration will stop.
If L3-01 is set to 2 (optimum adjustment), the motor accelerates so that the current is held at a level of 50 % of
the inverter rated current. With this setting, the acceleration time setting is ignored.
Related Parameters
Parameter
Number
Name
Setting
Range
Factory
Setting
Change
during
Operation
Access
Level
L3-01 Stall prevention selection during acceleration 0 to 2 1 No A
L3-02 Stall prevention level during acceleration 0 to 200 120% No A
Forward
Reverse
Output frequency
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