Parameter Group 3-** Reference/Ramps - Danfoss VLT HVAC Drive FC 131 Programming Manual

VLT® HVAC Drive FC 131
Programming Guide
Table 92: Option:
[0] Off
[2] AC brake
2-16 AC Brake, Max current
Default value: 100%
Conversion index: -
Enter the maximum allowed current when using the AC brake to avoid overheating motor windings.
Table 93: Range:
Min: 0%
2-17 Over-voltage Control
Default value: [2] Enabled
Conversion index: -
Select whether to enable OVC during ramp down, which reduces the risk of drive trip due to overvoltage on the DC link caused by
generative power from load.
Table 94: Option:
[0] Disabled
[1] Enabled (not at stop)
[2] Enabled
2-19 Over-voltage Gain
Default value: 100%
Conversion index: -
This parameter enables the user to fine tune the overvoltage gain for parameter 2-17 Over-voltage Control. It is not necessary to
change this parameter for normal applications.
Table 95: Range:
Min: 1%

4.5 Parameter Group 3-** Reference/Ramps

4.5.1 3-0* Reference Limits
Parameters for setting the reference unit, limits, and ranges. Also see parameter group 20-0* Feedback for information on settings in
closed loop.
3-02 Minimum Reference
Default value: 0
Conversion index: -3
Danfoss A/S © 2022.05
The brake resistor is not active.
AC brake is active.
Parameter type: Range
Data type: u_int16
Max: 160%
Parameter type: Option
Data type: u_int8
No OVC required.
Activates OVC when the drive is not in the stop state.
Activates OVC.
The ramp time is automatically adjusted to avoid tripping of the drive.
Parameter type: Range
Data type: u_int16
Max: 500%
Parameter type: Range
Data type: int32
2-setup: All setups
Change during operation: True
Default value: 100%
2-setup: All setups
Change during operation: True
N O T I C E
2-setup: All setups
Change during operation: True
Default value: 100%
2-setup: All setups
Change during operation: True
AU370727746889en-000101 / 130R0994 | 61
Parameters