YASKAWA GA700 Technical Manual page 849

0 : Disabled
The regenerative torque limit and the output frequency are not adjusted. An ov [DC Bus Overvoltage] may be
detected when regenerative loads are applied. Use this setting if the dynamic braking options are installed.
1 : Enabled
When the DC bus voltage rises due to regenerative load, an ov is prevented by decreasing the regenerative torque
limit and increasing the output frequency.
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L3-17: DC Bus Reg Level
No.
Name
(Hex.)
L3-17 DC Bus Reg 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)
This parameter is enabled when any of the following settings are made.
• 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 faults such as ov [Overvoltage] and Uv1 [DC Bus Undervoltage] occur when deceleration is started due to the stall prevention
during deceleration function when L2-29 = 1, H1-xx = 7A or 7B, or L3-04 = 2, gradually increase the setting value in increments of
0.1. Speed or current ripples become significant if the setting value is too high.
• Gradually increase the setting value in increments of 0.1 when ov issues occur due to sudden increases in regenerative load while L3-11
= 1. Speed or current ripples become significant if the setting value is too high.
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L3-21: Accel/Decel Rate Calculate Gain
No.
Name
(Hex.)
L3-21 Accel/Decel Rate
Calculate Gain
(0466)
This parameter is enabled when any of the following settings are made.
• 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.)]
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
V/f CL-V/f OLV CLV AOLV
Set the target value for the DC bus voltage used when the overvoltage
suppression function and the Decel Stall Prevention function (Intelligent
Stall Prevention) are running.
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 used 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
11.9 L: Protection Function
Default Setting
(Range)
200 V Class: 375 V,
400 V Class: 750 V
(200 V Class: 150 -
400 V, 400 V Class:
300 - 800 V)
Default Setting
(Range)
Determined by A1-02
(0.00 - 5.00)
Default Setting
(Range)
Determined by A1-02
(0.10 - 10.00)
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