Danfoss VLT FC 102 Programming Manual page 82

Parameter Descriptions
3-82 Starting Ramp Up Time
Range:
Size
related s]
*
3 3
3.5.6 3-9* Digital Pot.Meter
Use the digital potentiometer function to increase or
decrease the actual reference by adjusting the set-up of
the digital inputs using the functions increase, decrease, or
clear. To activate the function, at least 1 digital input must
be set to increase or decrease.
3-90 Step Size
Range:
0.10 %
*
200 %]
3-91 Ramp Time
Range:
1 s
3-92 Power Restore
Option:
[0] Off
*
[1] On
80
Function:
[0.01 - 3600 The ramp-up time is the
acceleration time from 0 RPM to
the nominal motor speed set in
parameter 3-82 Starting Ramp Up
Time when [0] Compressor Torque is
active in parameter 1-03 Torque
Characteristics.
Function:
[0.01 - Enter the increment size required
for increase/decrease as a
percentage of the synchronous
motor speed, n . If increase/
s
decrease is activated, the resulting
reference is increased or decreased
by the value set in this parameter.
Function:
[0 - 3600 s] Enter the ramp time, that is, the
time for adjusting the reference 0–
100% of the specified digital
potentiometer function (increase,
decrease, or clear).
If increase/decrease is activated for
longer than the ramp delay period
specified in parameter 3-95 Ramp
Delay, the actual reference is
ramped up/down according to this
ramp time. The ramp time is
defined as the time spent to adjust
the reference by the step size
specified in parameter 3-90 Step
Size.
Function:
Resets the digital potentiometer
reference to 0% after power-up.
Restores the most recent digital
potentiometer reference at power-
up.
Danfoss A/S © 10/2019 All rights reserved.
®
VLT HVAC Drive FC 102
3-93 Maximum Limit
Range:
100 %
*
3-94 Minimum Limit
Range:
0 %
*
3-95 Ramp Delay
Range:
Size
related
*
Speed
Inc
Illustration 3.23 Ramp Delay Case 1
Speed
Dec
Inc
Illustration 3.24 Ramp Delay Case 2
Function:
[-200 - Set the maximum allowed value for
200 %] the resulting reference. This is
recommended if the digital potenti-
ometer is used for fine-tuning of
the resulting reference.
Function:
[-200 - Set the minimum allowed value for
200 %] the resulting reference. This is
recommended if the digital potenti-
ometer is used for fine-tuning of
the resulting reference.
Function:
[ 0.000 - Enter the delay required from
0.000 ] activation of the digital potenti-
ometer function until the frequency
converter starts to ramp the
reference. With a delay of 0 ms, the
reference starts to ramp when
increase/decrease is activated. See
also parameter 3-91 Ramp Time.
P 3-95
P 3-95
Time (s)
Time (s)
M0010001