Danfoss FC 300 Design Manual page 159

FC 300 Design Guide
functions INCREASE, DECREASE or CLEAR. To ac-
tivate the function, at least one digital input must
be set up to INCREASE or DECREASE.
3-90 Step Size
Value:
0.01 - 200.00%
Function:
Enter the increment size required for INCREASE/
DECREASE, as a percentage of the nominal speed
set in par. 1-25. If INCREASE / DECREASE is ac-
tivated the resulting reference will be increased /
decreased by the amount set in this parameter.
3-91 Ramp Time
Value:
0.000 - 3600.00 s
Function:
Enter the ramp time, i.e. the time for adjustment
of the reference from 0% to 100% of the specified
digital potentiometer function (INCREASE, DE-
CREASE or CLEAR).
If INCREASE / DECREASE is activated for longer
than the ramp delay period specified in par. 3-95
the actual reference will be ramped up / down ac-
cording to this ramp time. The ramp time is de-
fined as the time used to adjust the reference by
the step size specified in par. 3-90 Step Size.
3-92 Power Restore
Value:
Off
factory setting
How to Programme
0.10%
1.00s
[0]
() display text []
MG.33.B7.02 - VLT is a registered Danfoss trademark
On
Function:
Select Off [0] to reset the Digital Potentiometer
reference to 0% after power up.
Select On [1] to restore the most recent Digital
Potentiometer reference at power up.
3-93 Maximum Limit
Value:
-200 - 200 %
Function:
Set the maximum permissible value for the resul-
tant reference. This is advisable if the Digital Po-
tentiometer is used for fine tuning of the resulting
reference.
3-94 Minimum Limit
Value:
-200 - 200 %
Function:
Set the minimum permissible value for the resul-
tant reference. This is advisable if the Digital Po-
tentiometer is used for fine tuning of the resulting
reference.
3-95 Ramp Delay
Value:
0.000 - 3600.00 s
Function:
Enter the delay required from activation of the
digital potentiometer function until the frequency
converter starts to ramp the reference. With a de-
lay of 0 ms, the reference starts to ramp as soon
as INCREASE / DECREASE is activated. See also
par. 3-91 Ramp Time.
value for use in communication via serial communication port
[1]
100%
-100%
1.000s
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