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3-87 Check Valve Ramp End Speed [Hz]
Range:
Function:
0 [Hz]*
[0 – Motor Speed Low Limit [Hz]]
Set the speed in [Hz] below Motor Speed Low Limit where the Check Valve Ramp will no longer be
active.
3-88 Final Ramp Time
Range:
Function:
0 [s]*
[0 – 60 [s]]
Enter the Final Ramp Time to be used when ramping down from Motor Speed Low Limit, par. 4-11
or 4-12, 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.
2.5.6 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 - 200.00 %]
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.
2 Parameter Description
VLT
®
AQUA Drive Programming Guide
56
MG.20.O4.02 - VLT
®
is a registered Danfoss trademark
2