Preventing The Motor From Stalling During Acceleration (Stall Prevention During Acceleration Function); Related Parameters - YASKAWA FSDrive-MV1S Instructions Manual

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 placed
on 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

Name
Constant
Number
Display
Stall prevention
selection during accel
L3-01
StallP Accel Sel
Stall prevention level
during accel
L3-02
StallP Accel Lvl
Stall prevention limit
during accel
L3-03
StallP CHP Lvl
* The factory setting will change when the control method is changed.
Setting
Description
Range
0: Disabled (Acceleration as
set. With a heavy load, the
motor may stall.)
1: Enabled (Acceleration
stopped when L3-02 level is
exceeded. Acceleration
starts again when the
0 to 2
current is returned.)
2: Intelligent acceleration
mode (Using the L3-02
level as a basis, acceleration
is automatically adjusted.
Set acceleration time is
disregarded.)
Effective when L3-01 is set to 1
or 2.
Set as a percentage of Inverter
rated current.
Usually setting is not necessary.
The factory setting reduces the
set values when the motor
stalls.
Sets the lower limit for stall
prevention during acceleration,
as a percentage of the Inverter
rated current, when operation is
in the frequency range above
E1-06.
Usually setting is not necessary.
Acceleration and Deceleration Characteristics
Change
Methods
Factory
during
Open-
Setting
Operation
loop
Vector
0 No A
0 to
150% No A
200
0 to
100%
No A
100
*
Control
MEMOBUS
Register
Flux
Vector
No 520H
No 521H
No 522H
13
6-