Danfoss VLT Series Programming Manual page 58

Parameter Description
3-90 Step Size
Range: Function:
0.10 % [0.01 - Enter the increment size required for
*
200.00 %] INCREASE/DECREASE, as a percentage of
the synchronous motor speed, n
INCREASE/ DECREASE is activated the
resulting reference will be increased /
decreased by the amount set in this
parameter.
3-91 Ramp Time
Range: Function:
1.00 s [0.00 - Enter the ramp time, i.e. the time for
3600.00 s] adjustment of 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 3-95 Ramp Delay the actual reference will
be 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 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 [ 0.000 - Enter the delay required from activation
related 0.000 ] of 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 3-91 Ramp Time.
®
VLT HVAC Drive Programming Guide
. If
s
®
MG.11.CC.02 - VLT is a registered Danfoss trademark
Speed
P 3-95
Inc
Speed
P 3-95
Dec
Inc
Time (s)
3 3
Time (s)
57