Danfoss VLT AQUA Drive FC 200 Programming Manual page 62

Parameter Description
3-85 Check Valve Ramp Time
Range:
Motor Speed Low Limit to the Check Valve End
3 3
Speed in 3-86 Check Valve Ramp End Speed [RPM] or
3-87 Check Valve Ramp End Speed [HZ]. See
Figure 3.19.
Speed
Motor Speed
High
Motor Speed
Low
Figure 3.19 Check Valve Ramp
3-86 Check Valve Ramp End Speed [RPM]
Range:
Size related
*
4-11 RPM]
3-87 Check Valve Ramp End Speed [HZ]
Range:
Size related
*
Hz]
3-88 Final Ramp Time
Range:
0 s [0 -
*
60 s]
3-36
Function:
Normal
Ramp
Check valve
End Speed
Function:
[ 0 - par. Set the speed in [RPM] below Motor
Speed Low Limit where the Check
Valve is expected to be closed and
the Check Valve no longer shall be
active. See Figure 3.19.
Function:
[ 0 - par. 4-12 Set the speed in [Hz] below Motor
Speed Low Limit where the Check
Valve Ramp will no longer be
active. See Figure 3.19.
Function:
Enter the Final Ramp Time to be used when
ramping down from Motor Speed Low Limit,
4-11 Motor Speed Low Limit [RPM] or 4-12 Motor
Speed Low Limit [Hz], to zero speed.
Submersible deep well pumps can be damaged by
running below minimum speed. A fast ramp time
below minimum pump speed is recommended.
This parameter may be applied as a fast ramp rate
from Motor Speed Low Limit to zero speed. See
Figure 3.18.
MG20O622 - VLT
®
VLT AQUA Drive Programming Guide
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:
0.10 %
*
3-91 Ramp Time
Range:
1 s [0 -
3600 s]
Time
3-92 Power Restore
Option: Function:
[0] Off Resets the Digital Potentiometer reference to 0% after
[1] On Restores the most recent Digital Potentiometer
3-93 Maximum Limit
Range:
100 %
*
3-94 Minimum Limit
Range:
0 %
*
®
is a registered Danfoss trademark
[0.01 - 200 %]
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,
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.
power-up.
reference at power-up.
Function:
[-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.
[-200 - 200 %]
Function:
Function: