■ L3: Stall Prevention
L2-08
(48CH)
Frequency Gain at KEB Start
Sets the percentage of output frequency reduction at the beginning of deceleration when the
KEB Ride-Thru function is started.
Reduction = (slip frequency before KEB) × L2-08 × 2
Default: 100%
Min: 0%
Max: 300%
255
L2-10
(48EH)
KEB Detection Time (Minimum
KEB Time)
Sets the time to perform KEB Ride-Thru.
Default: 50 ms
Min: 0 ms
Max: 2000 ms
255
L2-11
(461H)
DC Bus Voltage Setpoint during
KEB
Sets the desired value of the DC bus voltage during KEB Ride-Thru.
Default:
<18> <33>
[E1-01] × 1.22
Min: 150 Vdc
Max: 400 Vdc
<18>
255
L2-29
(475H)
KEB Method Selection
0: Single Drive KEB Ride-Thru 1
1: Single Drive KEB Ride-Thru 2
2: System KEB Ride-Thru 1
3: System KEB Ride-Thru 2
Default: 0
Min: 0
Max: 3
255
<9> Default setting is determined by the drive model (o2-04) and duty selection (C6-01).
<12> Setting range value is dependent on the units selected for the accel/decel time (C1-10). When C1-10 = 0 (units of 0.01 s), the setting range
becomes 0.00 to 600.00 s.
<18> Values shown here are for 200 V class drives. Double the value when using a 400 V class drive.
<33> Default setting value is dependent on the setting for the input voltage (E1-01).
No. (Addr.) Name Description Setting Page
L3-01
(48FH)
Stall Prevention Selection during
Acceleration
0: Disabled.
1: General purpose. Acceleration is paused as long as the current is above the L3-02 setting.
2: Intelligent. Accelerate in the shortest possible time without exceeding the L3-02 level.
Note: Setting 2 is not available when using OLV/PM.
Default: 1
Min: 0
Max: 2
256
L3-02
(490H)
Stall Prevention Level during
Acceleration
Used when L3-01 = 1 or 2. 100% is equal to the drive rated current.
Default:
<35>
Min: 0%
Max: 150%
<35>
257
L3-03
(491H)
Stall Prevention Limit during
Acceleration
Sets Stall Prevention lower limit during acceleration when operating in the constant power
range. Set as a percentage of the drive’s rated current.
Default: 50%
Min: 0%
Max: 100%
257
L3-04
(492H)
Stall Prevention Selection during
Deceleration
0: Disabled. Deceleration at the active deceleration rate. An ov fault may occur.
1: General purpose. Deceleration is paused when the DC bus voltage exceeds the Stall
Prevention level.
2: Intelligent. Decelerate as fast as possible while avoiding ov faults.
3: Stall Prevention with braking resistor. Stall Prevention during deceleration is enabled in
coordination with dynamic braking.
4: Overexcitation Deceleration. Decelerates while increasing the motor flux.
5: Overexcitation Deceleration 2. Adjust the deceleration rate according to the DC bus voltage.
Default: 1
Min: 0
Max: 5
<34>
258
L3-05
(493H)
Stall Prevention Selection during
Run
0: Disabled. Drive runs at a set frequency. A heavy load may cause speed loss.
1: Decel time 1. Uses the deceleration time set to C1-02 while Stall Prevention is performed.
2: Decel time 2. Uses the deceleration time set to C1-04 while Stall Prevention is performed.
Default: 1
Min: 0
Max: 2
259
L3-06
(494H)
Stall Prevention Level during Run
Enabled when L3-05 is set to 1 or 2. 100% is equal to the drive rated current.
Default:
<35>
Min: 30%
Max: 150%
<35>
259
L3-11
(4C7H)
Overvoltage Suppression Function
Selection
Enables or disables the ov suppression function, which allows the drive to change the output
frequency as the load changes to prevent an ov fault.
0: Disabled
1: Enabled
Default: 0
Min: 0
Max: 1
260
L3-17
(462H)
<18>
Target DC Bus Voltage for
Overvoltage Suppression and Stall
Prevention
Sets the desired value for the DC bus voltage during overvoltage suppression and Stall
Prevention during deceleration.
Default: 370 Vdc <33>
Min: 150 Vdc
Max: 400 Vdc
<33>
260
L3-20
(465H)
DC Bus Voltage Adjustment Gain
Sets the proportional gain for KEB Ride-Thru, Stall Prevention, and overvoltage suppression.
Default:
<10>
Min: 0.00
Max: 5.00
260
No. (Addr.) Name Description Setting Page
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