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VLT Automation VT Drive FC322
Programming Guide
22-81 Square-linear Curve Approximation
Range:
100 %*
[0 - 100 %]
NB!
Please note: Not visible when running in cascade.
22-82 Work Point Calculation
Option:
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Function:
Example 1:
Adjustment of this parameter allows the shape of the control curve to be adjusted.
0 = Linear
100% = Ideal shape (theoretical).
Function:
Example 1: Speed at System Design Working Point is known:
From the data sheet showing characteristics for the specific equipment at different speeds, simply
reading across from the H
point and the Q
DESIGN
System Design Working Point. The pump characteristics at this point should be identified and the
associated speed programmed. Closing the valves and adjusting the speed until H
achieved allows the speed at the no flow point to be identified.
Square-linear Curve Approximation
Adjustment of par. 22-81
curve to be adjusted infinitely.
Example 2:
MG.20.W1.22 - VLT is a registered Danfoss trademark
2 Parameter Description
point allows us to find point A, which is the
DESIGN
MIN
then allows the shape of the control
2
has been
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