3-82 Starting Ramp Up Time
Range: Function:
Size related* [0.01 -
3600
s]
The ramp-up time is the acceleration
time from 0rpm to the nominal motor
speed set in 3-82 Starting Ramp Up
Time when Compressor Torque is
active in 1-03 Torque Characteristics.
3.5.6 3-9* Digital Pot.Meter
The digital potentiometer function allows the user to
increase
or decrease the actual reference by adjusting the
set-up of the digital inputs using the functions INCREASE,
DECREASE or CLEAR. To activate the function, at least one
digital input must be set up to INCREASE or DECREASE.
3-90 Step Size
Range: Function:
0.10 %* [0.01 -
200
%]
Enter the increment size required for
INCREASE/DECREASE, as a percentage of
the synchronous motor speed, n
s
. If
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 s [0 -
3600
s]
Enter the ramp time, i.e. the time for 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:
1 * [0 - 3600 ] 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 3-91 Ramp Time.
Speed
Time (s)
Inc
130BA158.11
P 3-95
Illustration 3.18
Speed
Time (s)
Dec
Inc
130BA159.11
P 3-95
Illustration 3.19
Parameter Description
VLT
®
Refrigeration Drive Programming Guide
54 MG16H102 - VLT
®
is a registered Danfoss trademark
33
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