2-17 Over-voltage Control
Option: Function:
Overvoltage control (OVC) reduces the risk of the adjustable frequency drive tripping due to over-
voltage on the DC link caused by generative power from the load.
[0] Disabled No OVC required.
[2] * Enabled Activates OVC.
NOTE!
The ramp time is automatically adjusted to avoid tripping of the adjustable frequency drive.
3.5 Main Menu - Reference/Ramps - Group 3
3.5.1 3-0* Reference Limits
Parameters for setting the reference unit, limits and ranges.
Please also see par. 20-0* for information on settings in closed-loop.
3-02 Minimum Reference
Range: Function:
0.000 Ref-
erenceFeed-
backUnit*
[-999999.999 - par. 3-03 Referen-
ceFeedbackUnit]
Enter the Minimum Reference. The minimum reference is the lowest value obtainable by summing
all references. The minimum reference value and unit matches the configuration choice made in
par.1-00
Configuration Mode
and par.20-12
Reference/Feedback Unit
, respectively.
NOTE!
This parameter is used in open-loop only.
3-03 Maximum Reference
Range: Function:
50.000 Ref-
erenceFeed-
backUnit*
[par. 3-02 - 999999.999 Referen-
ceFeedbackUnit]
Enter the maximum acceptable value for the remote reference. The Maximum Reference value and
unit matches the configuration choice made in par.1-00
Configuration Mode
and par.20-12
Refer-
ence/Feedback Unit
, respectively.
NOTE!
If operating with par. 1-00, Configuration Mode set for Closed-loop [3], par.
20-14, Maximum Reference/Feedb. must be used.
3-04 Reference Function
Option: Function:
[0] * Sum Sums both external and preset reference sources.
[1] External/Preset Use either the preset or the external reference source.
Shift between external and preset via a command on a digital input.
VLT
®
HVAC Drive Programming Guide 3 Parameter Description
MG.11.C6.22 - VLT
®
is a registered Danfoss trademark
3-33
3
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