YASKAWA GA800 Programming Manual page 458

2.9 L: Protection Functions
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L3-11: Overvoltage Suppression Select
No.
Name
(Hex.)
L3-11 Overvoltage Suppression
Select
(04C7)
0 : Disabled
The drive does not adjust the regenerative torque limit or the output frequency. If you apply a regenerative load, the
drive can detect an ov [Overvoltage] fault. Use this setting with a dynamic braking option.
1 : Enabled
When a regenerative load increases the DC bus voltage, the drive decreases the regenerative torque limit and
increases the output frequency to prevent ov
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L3-17: DC Bus Regulation Level
No.
Name
(Hex.)
L3-17 DC Bus Regulation Level
(0462)
Note:
This value is initialized when E1-01 [Input AC Supply Voltage] is changed.
Sets this parameter for any of the following circumstances.
• L3-11 = 1 [OV Suppression Function Select = Enabled].
• L3-04 = 2 [Decel Stall Prevention Selection = Automatic Decel Reduction].
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L3-20: DC Bus Voltage Adjustment Gain
No.
Name
(Hex.)
L3-20 DC Bus Voltage Adjustment
Gain
(0465)
Expert
Set one of these parameters to enable L3-20:
• L2-29 = 1 [KEB Method Selection = Single Drive KEB Ride-Thru 2]
• L3-04 = 2 [Decel Stall Prevention Selection = Automatic Decel Reduction]
• L3-11 = 1 [OV Suppression Function Select = Enabled]
• H1-xx = 7A or 7B [MFDI Function Select = KEB Ride-Thru 2 (N.O./N.C.)]
Note:
• If stall prevention during deceleration function causes ov [Overvoltage] and Uv1 [DC Bus Undervoltage] faults when you start deceleration
and L2-29 = 1, H1-xx = 7A or 7B, or L3-04 = 2, gradually increase this parameter in 0.1-unit increments. If the setting value is too high, it
can cause large speed or current ripples.
• If sudden increases in the regenerative load cause ov faults and L3-11 = 1, gradually increase this parameter in 0.1-unit increments. If the
setting value is too high, it can cause large speed or current ripples.
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L3-21: OVSuppression Accel/Decel P Gain
No.
Name
(Hex.)
L3-21 OVSuppression Accel/Decel
P Gain
(0466)
Expert
Set one of these parameters to enable L3-21:
• L2-29 = 1 [KEB Method Selection = Single Drive KEB Ride-Thru 2]
• L3-04 = 2 [Decel Stall Prevention Selection = Automatic Decel Reduction]
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V/f CL-V/f OLV CLV AOLV
Sets the overvoltage suppression function.
V/f CL-V/f OLV CLV AOLV
Sets the target value for the DC bus voltage when the overvoltage suppression function and the Decel
Stall Prevention function (Intelligent Stall Prevention) are active.
V/f CL-V/f OLV CLV AOLV
Sets the proportional gain used to control the DC bus voltage.
V/f CL-V/f OLV CLV AOLV
Sets the proportional gain to calculate acceleration and deceleration rates.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
YASKAWA TOEPYAIGA8002B GA800 Drive Programming
Default
(Range)
0
(0, 1)
Default
(Range)
200 V Class: 375 V, 400 V:
750 V
(200 V Class: 150 to 400 V,
400 V Class: 300 to 800 V)
Default
(Range)
Determined by A1-02
(0.00 - 5.00)
Default
(Range)
Determined by A1-02
(0.10 - 10.00)