Danfoss VLT AQUA Programming Manual page 208

2. Parameter Description
Parameter used
Flow Compensation
2
Square-Linear Curve Approximation
Work Point Calculation
Speed at No Flow
Speed at Design Point
Pressure at No Flow
Pressure at Rated Speed
Flow at Design Point
Flow at Rated Speed
22-80 Flow Compensation
Option:
[0]
[1]
22-81 Square-Linear Curve Approximation
Range:
100%
22-82 Work Point Calculation
Option:
[0]
[1]
208
*
Disabled
Enabled
*
[ 0 – 100%]
*
Disabled
Enabled
MG.20.O2.02 - VLT
Parameter
Design Point
number
(Par 22-80)
(Par 22-81)
(Par 22-82)
(Par 22-83/84)
(Par 22-85/86)
(Par 22-87)
(Par 22-88)
(Par 22-89)
(Par 22-90)
Function:
Disabled
[0] : Set-Point compensation not active.
[1] Enabled :Set-Point compensation is active. Enabling this pa-
rameter allows Flow Compensated Setpoint operation.
Function:
Example 1:
Adjustment of this parameter allows the shape of the control
curve to be adjusted.
0 = Linear
100% = Ideal shape (theoretical).
Function:
Disabled [0]
: Work Point Calculation not active. To be used if
speed at design point is known (see table above).
Enabled [1]
: Work Point Calculation is active. Enabling this pa-
rameter allows the calculation of the unknown System Design
Working Point at 50/60 Hz speed, from the input data set in par.
22-83/84, 22-87, 22-88, 22-89 and 22-90.
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VLT AQUA Drive Programming Guide
Speed at Speed at
Design Point
KNOWN UNKNOWN
+ +
+ +
+ +
+ +
+ -
+ +
- +
- +
- +