YASKAWA Varispeed E7 Instruction Manual And Parameter Description page 121

Stall Prevention: L3
Con-
stant
Number
Stall prevention
L3-01 selection during
accel
Stall prevention
L3-02
level during accel
Stall prevention
L3-04 selection during
decel
Stall prevention
L3-05 selection during
running
Stall prevention
L3-06 level during run-
ning
-34
5
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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 has fallen below the
stall prevention level).
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 changing this setting is not
necessary. Reduce the setting when
the motor stalls.
0: Disabled (Deceleration as set. If
deceleration time is too short, a
DC-Bus overvoltage may
result.)
1: Enabled (Deceleration is
stopped when the DC-Bus
voltage exceeds the stall preven-
tion level. Deceleration restarts
when the voltage falls below the
stall prevention level again.)
2: Intelligent deceleration mode
(Deceleration rate is
automatically adjusted so that in
Inverter can decelerate in the
shortest possible time. The set
deceleration time is
disregarded.)
When a braking option (Braking
Resistor Unit, Braking Unit) is
used, always set to 0.
0: Disabled (Runs as set. With a
heavy load, the motor may stall.)
1: Deceleration using deceleration
time 1 (C1-02.)
2: Deceleration using decelera-
tiontime 2 (C1-04.)
Effective when L3-05 is 1 or 2.
Set as a percentage of the Inverter
rated current.
Usually changing this setting is not
necessary.
Reduce the setting when the motor
stalls.
Change
Access
during
Setting Factory
Range Setting Level
Opera-
tion
0 to 2 1 No
0 to 200 120% No
0 to 2 1 No
0 to 2 1 No
30 to
120% No
200
MEMO-
BUS Page
Register
A 48FH 6-18
A 490H 6-18
Q 492H 6-20
A 493H 6-30
A 494H 6-30