Danfoss VLT FC 102 Programming Manual page 643

Programming Guide | VLT® HVAC Drive FC 102
Setup: All setups
Data type: Uint16
The kinetic back-up controller integral time value enables optimizing the DC-link voltage response. If there is external capacitance on
the DC link, increase the value. To obtain fast control response, decrease the value. However, if the value is too low, the process becomes
unstable.
40-12 Kin.Back-up Lead Filter Time
Default value: 0.150 s
Setup:
All setups
Data type: Uint16
This parameter is only valid in VVC+ control.
This parameter specifies the kinetic back-up controller lead filter time. Increase this value to ensure stable DC-link voltage control for
high-inertia applications.
40-13 Kin. Back-up Min Run Time
Default value: Size related
Setup:
All setups
Data type: Uint16
Minimum runtime of the kinetic back-up. Kinetic back-up control must run during this time, even mains voltage can come back
within this time span. The purpose of this function is to avoid that the drive frequently changes in and out of kinetic back-up mode, if
fluctuating mains voltage occurs.
40-14 Mains Loss Duration
Default value: 60.00 s
Setup: All setups
Data type: UInt16
Enter the maximum value of mains loss duration. When parameter 14-10 Mains Failure = [4] Kinetic Back-up, the DC-link voltage boosts
to the value set in parameter 40-10 Kin. Back-up UdcRef. Then the drive returns to normal operation. The drive allows 2 successive mains
faults. A 3rd mains fault triggers a trip. Setting this parameter to 60 s disables the function.
40-15 Kin.Back-up Start Off
Default value:
0.0 V
Setup: All setups
Data type:
Uint16
Set the voltage offset to be added to the kinetic back-up reference to boost the gain when kinetic back-up is activated. This function is
used in low-inertia applications.
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Parameter Descriptions
-3
True
Range, 0.001 - 1000 s
-3
True
Range, 0.005 - 2 s
-3
True
Range, 0.05 - 60.00 s
-2
True
Range, -200.0 - 200.0 V
-1
True
AU430028034214en-001901 / 130R0310 | 643