5-60
Stall Prevention: L3
User constants for the stall prevention function are shown in the following table.
Con-
stant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO-
BUS
Regis-
ter
Page
Display
V/f
V/f
with
PG
Open
Loop
Vec-
tor
1
Flux
Vec-
tor
Open
Loop
Vec-
tor
2
L3-01
Stall pre-
vention
selection
during accel
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.)
0 to 2 1 No A A A No No 48FH
4-21
6-23
加速防止失
速选择
L3-02
Stall pre-
vention
level dur-
ing accel
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.
0 to
200
150% No A A A No No 490H
4-21
6-23
加速防止
失速值
L3-03
Stall pre-
vention
limit dur-
ing accel
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.
0 to
100
50% No A A A No No 491H
4-21
6-23
加速防止失
速极限
L3-04
Stall pre-
vention
selection
during
decel
0: Disabled (Deceleration as
set. If deceleration time is
too short, a main circuit
overvoltage may result.)
1: Enabled (Deceleration is
stopped when the main
circuit voltage exceeds the
overvoltage level.
Deceleration restarts when
voltage is returned.)
2: Intelligent deceleration
mode (Deceleration rate is
automatically adjusted so
that the Inverter can
decelerate in the shortest
possible time. Set
deceleration time is
disregarded.)
3: Enabled (with Braking
Resistor Unit)
When a braking option (Brak-
ing Resistor, Braking Resistor
Unit, Braking Unit) is used,
always set to 0 or 3.
0 to 3
*1
1 No Q Q Q Q Q 492H
4-6
4-21
6-25
减速防止失
速选择
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