11.9 L: Protection Functions
256 YASKAWA SIEPYEULA5001C LA500 Technical Manual
11.9 L: Protection Functions
◆ L1: Motor Protection
No.
(Hex.)
Name Description
Default
(Range)
Ref.
L1-01
(0480)
Motor Overload (oL1)
Protection
Sets the motor overload protection with electronic thermal protectors.
0 : No
1 : Variable Torque
2 : Constant Torque 10:1 Speed Range
3 : Constant Torque 100:1 SpeedRange
1
(0 - 3)
327
L1-02
(0481)
Expert
Motor Overload
Protection Time
Sets the operation time for the electronic thermal protector of the drive to prevent
damage to the motor. Usually it is not necessary to change this setting.
1.0 min
(0.1 - 5.0 min)
329
L1-13
(046D)
Expert
Motor Overload Memory
Selection
Sets the function that keeps the current electronic thermal protector value when the
drive stops receiving power.
0 : Disabled
1 : Enabled
1
(0, 1)
329
◆ L2: Power Loss Ride Through (Undervoltage Detection)
No.
(Hex.)
Name Description
Default
(Range)
Ref.
L2-05
(0489)
Expert
Undervoltage Detection
Lvl (Uv1)
Sets the voltage at which a Uv1 [DC Bus Undervoltage] fault is triggered. Usually it is
not necessary to change this setting.
NOTICE: Damage to Equipment. When you set this parameter
to a value lower than the default, you must install an AC
reactor on the input side of the power supply. If you do not
install an AC reactor, it will cause damage to the drive circuitry.
Determined by E1-01
(400 V Class: 300 - 420
V)
329
◆ L3: Stall Prevention
No.
(Hex.)
Name Description
Default
(Range)
Ref.
L3-01
(048F)
Expert
Stall Prevention during
Accel
Sets the method of the Stall Prevention During Acceleration.
0 : Disabled
1 : Enabled
1
(0 - 1)
330
L3-02
(0490)
Expert
Stall Prevent Level
during Accel
Sets the output current level at which the Stall Prevention function operates during
acceleration where the drive rated output current is 100%.
Determined by L8-38
(0 - 165%)
331
L3-03
(0491)
Expert
Stall Prevent Limit
during Accel
Sets the lower limit for the stall prevention level used in the constant output range as a
percentage of the drive rated output current.
50%
(0 - 100%)
331
L3-05
(0493)
Expert
Stall Prevention during
RUN
Sets the function to enable and disable Stall Prevention During Run.
Note:
An output frequency less than 6 Hz disables Stall Prevention during Run. The
setting values of L3-05 and L3-06 [Stall Prevent Level during Run] do not have an
effect.
0 : No
1 : Deceleration Time 1 (C1-02)
1
(0 - 1)
331
L3-06
(0494)
Expert
Stall Prevent Level
during Run
Sets the output current level at which the Stall Prevention function is enabled during run
when the drive rated output current is 100%.
Note:
This parameter is applicable when L3-05 = 1 [Stall Prevention during RUN =
Deceleration Time 1 (C1-02)].
Determined by L8-38
(30 - 165%)
332
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