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Param-
eter
Number
KEB decel-
eration time
L2-06
KEB Fre-
quency
Momentary
recovery
time
L2-07
UV
RETURN
TIME
Frequency
reduction
gain at KEB
start
L2-08
KEB Decel
Time
* 1. The factory settings depend on the Inverter capacity. The values for a 200 V Class Inverter of 0.4 kW are given.
* 2. These are values for a 200 V Class Inverter. Values for a 400 V Class Inverter are double.
* 3. If the setting is 0, the axis will accelerate to the specified speed over the specified acceleration time (C1-01 to C1-08).
Stall Prevention: L3
User parameters for the stall prevention function are shown in the following table.
Param-
eter
Number
Stall pre-
vention
selection
during accel
L3-01
StallP Accel
Sel
Stall pre-
vention
level during
accel
L3-02
StallP Accel
Lvl
-60
5
Name
Description
Display
Sets in seconds the time
required to decelerate from
the speed where the deceler-
ation at momentary power
loss command (KEB) is
input to zero-speed.
Set in seconds the time to
accelerate to the set speed
after recovery from a
momentary power loss.
Sets as a percent the about to
reduce the output frequency
at the beginning of decelera-
tion at momentary power
loss (KEB).
Reduction = slip frequency
before KEB operation × L2-
08 × 2
Name
Description
Display
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 neces-
sary. The factory setting
reduces the set values when
the motor stalls.
Control Methods
Change
Setting
Factory
during
Range
Setting
Opera-
V/f
tion
0.0 to
0.0 s
No
A
200.0
0.0 to
0.0 s
No
A
25.5
*3
0 to
100%
No
A
300
Control Methods
Change
Setting
Factory
during
Range
Setting
Opera-
V/f
tion
0 to 2
1
No
A
0 to
150%
No
A
200
*1
Regis-
V/f
Open
Flux
Page
ter
with
Loop
Vec-
PG
Vector
tor
A
A
A
48AH
-
A
A
A
48BH
-
A
A
A
48CH
-
Regis-
V/f
Open
Flux
Page
ter
with
Loop
Vec-
PG
Vector
tor
A
A
No
48FH 6-28
A
A
No
490H 6-28
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Troubleshooting
