L3: Stall Prevention - YASKAWA A1000 Technical Manual

B.8 L: Protection Function
<5> Values shown are specific to 200 V class drives. Double the value for 400 V class drives. Multiply the value by 2.875 for 600 V class drives, but
set the value below 1040 Vdc (overvoltage protection level).
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L3: Stall Prevention

No.
(Addr. Name
Hex)
L3-01 Stall Prevention Selection
(48F) during Acceleration
L3-02 Stall Prevention Level
(490) during Acceleration
L3-03 Stall Prevention Limit
(491) during Acceleration
L3-04 Stall Prevention Selection
(492) during Deceleration
L3-05 Stall Prevention Selection
(493) during Run
L3-06 Stall Prevention Level
(494) during Run
L3-11 Overvoltage Suppression
(4C7) Function Selection
Target DC Bus Voltage for
L3-17
Overvoltage Suppression
(462)
and Stall Prevention
L3-20 DC Bus Voltage Adjustment
(465) Gain
L3-21 Accel/Decel Rate
(466) Calculation Gain
Deceleration Time at Stall
L3-22
Prevention during
(4F9)
Acceleration
Automatic Reduction
L3-23
Selection for Stall
(4FD)
Prevention during Run
L3-24 Motor Acceleration Time for
(46E) Inertia Calculations
216
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.
Used when L3-01 = 1 or 2. 100% is equal to the drive rated current.
Sets Stall Prevention lower limit during acceleration when operating in the
constant power range. Set as a percentage of drive rated current.
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.
Note: Setting 3 is not available in models CIMR-Ao4A0930 and 4A1200.
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.
Enabled when L3-05 is set to 1 or 2. 100% is equal to the drive rated current. Default:
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
Sets the desired value for the DC bus voltage during overvoltage suppression
and Stall Prevention during deceleration.
Sets the proportional gain for KEB Ride-Thru, Stall Prevention, and
overvoltage suppression.
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).
Sets the deceleration time used for Stall Prevention during acceleration in
OLV/PM.
0: Sets the Stall Prevention level set in L3-04 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.
Sets the time needed to accelerate the uncoupled motor at rated torque from
stop to the maximum frequency.
YASKAWA ELECTRIC TOEP C710616 41B YASKAWA AC Drive - A1000 Quick Start Guide
Description Values Page
Default: 1
111
Range: 0 to 2
<1>
Default:
Min.: 0% 112
<1>
Max.: 150%
Default: 50%
Min.: 0 112
Max.: 100
Default: 1
113
<2>
Range: 0 to 5
Default: 1
114
Range: 0 to 2
<1>
Min.: 30% 114
<1>
Max.: 150%
Default: 0
–
Range: 0, 1
Default: 370 Vdc
<3> <8>
–
Min.: 150
<8>
Max.: 400
<4>
Default:
–
Min.: 0.00
Max.: 5.00
Default: 1.00
Min.: 0.10 –
Max.: 10.00
Default: 0.0 s
Min.: 0.0 –
Max.: 6000
Default: 0
–
Range: 0, 1
<5> <6>
Default:
<7>
–
Min: 0.001 s
Max: 10.000 s