YASKAWA A1000 Technical Manual page 496

B.3 Parameter Table

L3: Stall Prevention
No. (Addr.) Name
L3-01 Stall Prevention Selection during
(48FH) Acceleration
L3-02 Stall Prevention Level during
(490H) Acceleration
L3-03 Stall Prevention Limit during
(491H) Acceleration
L3-04 Stall Prevention Selection during
(492H) Deceleration
L3-05 Stall Prevention Selection during
(493H) Run
L3-06
Stall Prevention Level during Run
(494H)
L3-11 Overvoltage Suppression Function
(4C7H) Selection
Target DC Bus Voltage for
L3-17
Overvoltage Suppression and Stall
(462H)
Prevention
L3-20
DC Bus Voltage Adjustment Gain
(465H)
L3-21
Accel/Decel Rate Calculation Gain
(466H)
L3-22 Deceleration Time at Stall
(4F9H) Prevention during Acceleration
L3-23 Automatic Reduction Selection for
(4FDH) Stall Prevention during Run
L3-24 Motor Acceleration Time for
(46EH) Inertia Calculations
L3-25
Load Inertia Ratio
(46FH)
L3-26
Additional DC Bus Capacitors
(455H)
496
V/f V/f w/PG
OLV/PM AOLV/PM
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.
V/f V/f w/PG
OLV/PM AOLV/PM
Used when L3-01 = 1 or 2. 100% is equal to the drive rated current.
V/f V/f w/PG
OLV/PM AOLV/PM
Sets Stall Prevention lower limit during acceleration when operating in the constant power
range. Set as a percentage of the drive's rated current.
All Modes
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 voltage.
Note: The setting of 3 is not available with models CIMR-A4A0930 and 4A1200.
V/f V/f w/PG
OLV/PM AOLV/PM
0: Disabled. Drive runs at a set frequency. A heavy load may cause stalling.
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.
V/f V/f w/PG
OLV/PM AOLV/PM
Enabled when L3-05 is set to 1 or 2. 100% is equal to the drive rated current.
All Modes
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
All Modes
Sets the desired value for the DC bus voltage during overvoltage suppression and Stall
Prevention during deceleration.
All Modes
Sets the proportional gain for KEB Ride-Thru, Stall Prevention, and overvoltage suppression.
All Modes
Sets the proportional gain used to calculate the deceleration rate during KEB Ride-Thru, ov
suppression function, and Stall Prevention during deceleration (L3-04 = 2).
V/f V/f w/PG
OLV/PM AOLV/PM
Sets the deceleration time used for Stall Prevention during acceleration in OLV/PM.
V/f V/f w/PG
OLV/PM AOLV/PM
0: Sets the Stall Prevention level set in L3-06 that is used throughout the entire frequency range.
1: Automatic Stall Prevention level reduction in the constant output range. The lower limit
value is 40% of L3-06.
All Modes
Sets the time needed to accelerate the uncoupled motor at rated torque from stop to the
maximum frequency.
V/f V/f w/PG
OLV/PM AOLV/PM
Sets the ratio between the motor and machine inertia.
All Modes
When DC bus capacitors have been added externally, be sure to add those values to the internal
capacitor table for proper DC bus calculations.
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Description
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
Setting Page
Default: 1
Min: 0 281
Max: 2

Default:
<35>
Min: 0% 283
Max: 150%
<35>
Default: 50%
Min: 0% 283
Max: 100%
Default: 1
Min: 0 283
Max: 5
<34>
Default: 1
Min: 0 284
Max: 2

Default:
<35>
Min: 30% 285
Max: 150%
<35>
Default: 0
Min: 0 285
Max: 1
Default: 375 Vdc
<18>
<33>
286
Min: 150 Vdc
Max: 400 Vdc
<18>

Default:
<10>
Min: 0.00 286
Max: 5.00

Default:
<10>
Min: 0.10 286
Max: 10.00
Default: 0.0 s
Min: 0.0 s 286
Max: 6000.0 s
Default: 0
Min: 0 287
Max: 1

Default:
<8> <9> <14>
Min: 0.001 s 287
Max: 10.000 s
Default: 1.0
Min: 1.0 287
Max: 1000.0
Default: 0 F
Min: 0 F
288
Max: 65000 F