L3: Stall Prevention - YASKAWA Z1000 User Manual

B.8 L: Protection Function
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L3: Stall Prevention

No.
(Addr. Name
Hex)
Stall Prevention
L3-01
Selection during
(48F)
Acceleration
L3-02 Stall Prevention Level
(490) during Acceleration
L3-03 Stall Prevention Limit
(491) during Acceleration
Stall Prevention
L3-04
Selection during
(492)
Deceleration
L3-05 Stall Prevention
(493) Selection during Run
L3-06 Stall Prevention Level
(494) during Run
Overvoltage
L3-11
Suppression Function
(4C7)
Selection
Target DC Bus Voltage
L3-17 for Overvoltage
(462) Suppression and Stall
Prevention
L3-20 DC Bus Voltage
(465) Adjustment Gain
L3-21 Accel/Decel Rate
(466) Calculation Gain
Deceleration Time at
L3-22
Stall Prevention during
(4F9)
Acceleration
Automatic Reduction
L3-23
Selection for Stall
(4FD)
Prevention during Run
Motor Acceleration
L3-24
Time for Inertia
(46E)
Calculations
L3-25
Load Inertia Ratio
(46F)
314
LCD Display
0: Disabled.
1: General purpose. Acceleration is paused as long as the
StallP Accel Sel
current is above the L3-02 setting.
0: Disabled
2: Intelligent. Accelerate in the shortest possible time without
1: General purpose
exceeding the L3-02 level.
2: Intelligent
Note:
Used when L3-01 = 1 or 2. 100% is equal to the drive rated
current.
StallP Accel Lvl
Sets Stall Prevention lower limit during acceleration when
StallPAcc LowLim 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.
StallP Decel Sel 1: General purpose. Deceleration is paused when the DC bus
0: Disabled voltage exceeds the Stall Prevention level.
1: General purpose 2: Intelligent. Decelerate as fast as possible while avoiding ov
2: Intelligent faults.
4: High Flux Brake 4: Overexcitation Deceleration. Decelerates while increasing
5: High Flux Brake2 the motor flux
5: Overexcitation Deceleration 2. Adjust the deceleration rate
according to the DC bus voltage.
0: Disabled. Drive runs at a set frequency. A heavy load may
StallP Run Sel cause speed loss.
0: Disabled 1: Decel time 1. Uses the deceleration time set to C1-02 while
1: Decel time Stall Prevention is performed.
2: Decel time 2 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.
StallP Run Level
Enables or disables the ov suppression function, which allows
OV Inhibit Sel the drive to change the output frequency as the load changes to
0: Disabled prevent an ov fault.
1: Enabled 0: Disabled
1: Enabled
Sets the desired value for the DC bus voltage during overvoltage
suppression and Stall Prevention during deceleration.
DC Bus Reg Level
Determines the proportional gain used by overvoltage
suppression (L3-11 = 1), Single drive KEB 2 (L2-29 = 1), KEB
DC Bus P Gain Ride-Thru 2 (H1-oo = 7A or 7B), and Intelligent Stall
Prevention during Deceleration (L3-04 = 2) to control the DC
bus voltage in OLV/PM.
Sets the proportional gain used to calculate the deceleration rate
during KEB Ride-Thru, ov suppression function, and Stall
Acc/Dec P Gain
Prevention during deceleration (L3-04 = 2).
Sets the deceleration time used for Stall Prevention during
PM Acc Stall P T acceleration in OLV/PM.
0: Sets the Stall Prevention level set in L3-04 that is used
CHP Stall P Sel
throughout the entire frequency range.
0: Lv1 set in L3-06
1: Automatic Stall Prevention level reduction in the constant
1: Autom. Reduction
output range. The lower limit value is 40% of L3-06.
OLV/PM OLV/PM
Mtr Accel Time
Sets the time needed to accelerate the uncoupled motor at rated
torque from stop to the maximum frequency.
OLV/PM OLV/PM
Load Inertia Rat
Sets the ratio between the motor and machine inertia.
Description
Setting 2 is not available when using OLV/PM.
YASKAWA ELECTRIC TOEP C710616 45F YASKAWA AC Drive – Z1000 User Manual
Values Page
Default: 1
–
Range: 0 to 2
<1>
Default:
Min.: 0% –
<1>
Max.: 150%
Default: 50%
Min.: 0 –
Max.: 100
Default: 1
Range: 0 to 2; 4,
–
<2>
5
Default: 1
–
Range: 0 to 2
<1>
Default:
Min.: 30% –
<1>
Max.: 150%
Default: 0
–
Range: 0, 1
Default: 370 Vdc
<3> <4>
–
Min.: 150
<4>
Max.: 400
<5>
Default:
–
Min.: 0.00
Max.: 5.00
<5>
Default:
–
Min.: 0.00
Max.: 200.00
Default: 0.0 s
Min.: 0.0 –
Max.: 6000
Default: 0
–
Range: 0, 1
<6> <7>
Default:
–
Min: 0.001 s
Max: 10.000 s
Default: 1.0
Min.: 1.0 –
Max.: 1000.0