Danfoss VLT AutomationDrive FC 301 Programming Manual page 79

Parameter Descriptions
3.4.9 3-9* Digital Pot.Meter
The digital potentiometer enables increase or decrease of
the actual reference by adjusting the set-up of the digital
inputs using the functions increase, decrease, or clear. To
activate the function, set at least 1 digital input to increase
or decrease.
Speed
P 3-95
Inc
Illustration 3.29 Increase Actual Reference
Speed
P 3-95
Dec
Inc
Illustration 3.30 Increase/Decrease Actual Reference
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 or decreased by the value set in
this parameter.
3-91 Ramp Time
Range: Function:
1.00 [0.00 - Enter the ramp time, that is the time for
s 3600.00 s] adjustment 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 used to adjust the reference by the step
size specified in parameter 3-90 Step Size.
MG33MO02
Programming Guide
3-92 Power Restore
Option: Function:
[0] Off Resets the digital potentiometer reference to 0% after
*
[1] On
3-93 Maximum Limit
Range:
100 %
*
Time (s)
3-94 Minimum Limit
Range:
-100 %
*
3-95 Ramp Delay
Range:
Time (s)
0
N/A N/A]
*
. If increase/
s
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power-up.
Restores the most recent digital potentiometer
reference at power-up.
Function:
[-200 - Set the maximum allowed value for the
200 %] resulting reference. This is recommended if
the digital potentiometer is used for fine-
tuning of the resulting reference.
Function:
[-200 - Set the minimum allowed value for the
200 %] resulting reference. This is recommended if
the digital potentiometer is used for fine-
tuning of the resulting reference.
Function:
[0 - 0 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 when increase/decrease is activated. See
also parameter 3-91 Ramp Time.
3 3
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