Danfoss VLT Refrigeration Drive FC 103 Programming Manual page 62

Parameter Description
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
3 3
clear. To activate the function, at least 1 digital input must
be set to increase or decrease.
3-90 Step Size
Range:
0.10 % [0.01 -
200 %]
*
3-91 Ramp Time
Range:
1 [0 - Enter the ramp time, that is the time for adjustment
s 3600 s] of 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.
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:
100 % [-200 -
*
200 %]
3-94 Minimum Limit
Range:
0 % [-200 -
*
200 %]
60
Function:
Enter the increment size required for
increase/decrease as a percentage of the
synchronous motor speed, n
decrease is activated, the resulting reference
is increased or decreased by the value set in
this parameter.
Function:
Function:
Set the maximum allowed value for the
resulting reference. This is recommended if
the digital potentiometer is used for fine-
tuning of the resulting reference.
Function:
Set the minimum allowed value for the
resulting reference. This is advisable if the
digital potentiometer is used for fine-tuning
of the resulting reference.
Danfoss A/S © 05/2016 All rights reserved.
®
VLT Refrigeration Drive FC 103
3-95 Ramp Delay
Range:
1 [0 -
*
3600]
Speed
. If increase/
s
Inc
Illustration 3.22 Ramp Delay Case 1
Speed
Dec
Inc
Illustration 3.23 Ramp Delay Case 2
Function:
Enter the delay required from activation 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
parameter 3-91 Ramp Time.
P 3-95
P 3-95
Time (s)
Time (s)
MG16H202