Parameters: 3-** Main Menu - Reference/Ramps - Danfoss VLT FC 102 Programming Manual

Parameter Descriptions
2-17 Over-voltage Control
Overvoltage control (OVC) reduces the risk of the frequency
converter tripping due to an overvoltage on the DC link caused
by generative power from the load.
Option:
3 3
[0] Disabled
[2] Enabled
*
2-19 Over-voltage Gain
Range:
100 %
*
3.5 Parameters: 3-** Main Menu -
Reference/Ramps
3.5.1 3-0* Reference Limits
Parameters for setting the reference unit, limits, and
ranges.
See also parameter group 20-0* FC Closed Loop for
information on settings in closed loop.
3-02 Minimum Reference
Range:
Size
related - par. 3-03
*
Reference-
FeedbackUnit]
3-03 Maximum Reference
Range:
Size
related 999999.999
*
Reference-
FeedbackUnit]
74
Function:
NOTICE
The ramp time is automatically
adjusted to avoid tripping of
the frequency converter.
No OVC required.
Activates OVC.
Function:
[10 - 200 %] Select overvoltage gain.
Function:
[ -999999.999 Enter the minimum reference. The
minimum reference is the lowest
value obtainable by summing all
references. The minimum reference
value and unit match the configu-
ration made in
parameter 1-00 Configuration Mode
and parameter 20-12 Reference/
Feedback Unit.
NOTICE
This parameter is used in open
loop only.
Function:
[ par. 3-02 - Enter the maximum reference. The
maximum reference is the highest
value obtainable by summing all
references.
The maximum reference unit
matches:
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®
VLT HVAC Drive FC 102
3-03 Maximum Reference
Range:
3-04 Reference Function
Option:
[0]
[1]
3.5.2 3-1* References
Select the preset references. Select Preset ref. bit 0/1/2 [16],
[17], or [18] for the corresponding digital inputs in
parameter group 5-1* Digital Inputs.
3-10 Preset Reference
Array [8]
Range:
0 %
*
Function:
•
The configuration selected
in parameter 1-00 Configu-
ration Mode: For [1] Speed
closed loop, RPM; for [2]
Torque, Nm.
•
The unit selected in
parameter 3-00 Reference
Range.
If [9] Positioning is selected in
parameter 1-00 Configuration Mode,
this parameter defines the default
speed for positioning.
Function:
Sum Sums both external and preset
reference sources.
External/Preset Use either the preset or the
external reference source.
Shift between external and preset
via a command on a digital input.
Function:
[-100 - Enter up to 8 different preset
100 %] references (0-7) in this parameter,
using array programming. The
preset reference is stated as a
percentage of the value Ref
(parameter 3-03 Maximum Reference,
for closed loop, see
parameter 20-14 Maximum
Reference/Feedb.). When using
preset references, select preset
reference bit 0/1/2 [16], [17], or [18]
for the corresponding digital inputs
in parameter group5-1* Digital
Inputs.
MAX
M0010001