Preventing The Motor From Stalling During Acceleration (Stall Prevention During Acceleration Function); Related Parameters - YASKAWA CIMR-F7A Instruction 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

Con-
stant
Number
Stall preven-
L3-01 tion selection
during accel
Stall preven-
L3-02 tion level dur-
ing accel
Stall preven-
L3-03 tion limit dur-
ing accel
* C6-01=1: 120%, C6-01=0: 150%
-30
6
Name Description
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 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 pre-
vention 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.
Control Methods
Change
Setting Factory during
Range Setting Opera-
V/f
tion
0 to 2 1 No A
120%
*
0 to 200 No A
150%
*
0 to 100 50% No A
MEMO
Open
BUS
V/f Flux
Loop
Regis-
with Vec-
Vec-
ter
PG tor
tor
A A No 48FH
A A No 490H
A A No 491H