
There are two methods which can be employed, depending upon whether or not the Speed at System design Working Point is known.
Parameter used
Parameter
number
Speed at
Design Point
KNOWN
Speed at
Design Point
UNKNOWN
Flow Compensation
(Par 22-80)
+
+
Square-Linear Curve Approximation
(Par 22-81)
+
+
Work Point Calculation
(Par 22-82)
+
+
Speed at No Flow
(Par 22-83/84)
+
+
Speed at Design Point
(Par 22-85/86)
+
-
Pressure at No Flow
(Par 22-87)
+
+
Pressure at Rated Speed
(Par 22-88)
-
+
Flow at Design Point
(Par 22-89)
-
+
Flow at Rated Speed
(Par 22-90)
-
+
22-80 Flow Compensation
Option:
Function:
[0] *
Disabled
[0]
Disabled
: Set-Point compensation not active.
[1]
Enabled
[1]
Enabled
:Set-Point compensation is active. Enabling this parameter allows the Flow Compensated
Setpoint operation.
22-81 Square-linear Curve Approximation
Range:
Function:
100 %*
[0 - 100 %]
Example 1:
Adjustment of this parameter allows the shape of the control curve to be adjusted.
0 = Linear
100% = Ideal shape (theoretical).
NB!
Please note: Not visible when running in cascade.
2 Parameter Description
VLT
®
AQUA Drive Programming Guide
194
MG.20.O4.02 - VLT
®
is a registered Danfoss trademark
2