Danfoss VLT AQUA Drive FC 202 Programming Manual page 63

Parameter Description
3-90 Step Size
Range: Function:
0.10 [0.01 - Enter the increment size required for
% 200 %] INCREASE/DECREASE, as a percentage of the
*
synchronous motor speed, n
DECREASE is activated, the resulting
reference is increased/decreased by the
amount set in this parameter.
3-91 Ramp Time
Range: Function:
1 [0 - Enter the ramp time, i.e. the time for adjustment of
s 3600 s] the reference from 0% to 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 used to adjust the
reference by the step size specified in
parameter 3-90 Step Size.
3-92 Power Restore
Option: Function:
[0] Off Resets the digital potentiometer reference to 0% after
power up.
[1] On Restores the most recent digital potentiometer
reference at power up.
3-93 Maximum Limit
Range: Function:
100 % [-200 - 200 Set the maximum permissible value for
*
%] the resultant reference. This is advisable if
the digital potentiometer is used for fine
tuning of the resulting reference.
3-94 Minimum Limit
Range: Function:
0 % [-200 - 200 Set the minimum permissible value for the
*
%] resultant reference. This is advisable if the
digital potentiometer is used for fine tuning
of the resulting reference.
3-95 Ramp Delay
Range: Function:
Size [ 0 - Enter the delay required from activation of
related 0 ] the digital potentiometer function until the
*
frequency converter starts to ramp the
reference. With a delay of 0 ms, the reference
starts to ramp as soon as INCREASE/DECREASE
is activated. See also parameter 3-91 Ramp
Time.
MG20O702
Programming Guide
Speed
. If INCREASE/
s
Inc
Illustration 3.21 Ramp Delay Case 1
Speed
Dec
Inc
Illustration 3.22 Ramp Delay Case 2
Danfoss A/S © Rev. 2014-01-21 All rights reserved.
P 3-95
Time (s)
P 3-95
Time (s)
3 3
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