Danfoss VLT AQUA Operating Instructions Manual page 118

6 How to Programme the Low Harmonic Drive
[0] * Disabled
6
[1] Enabled
22-84 Speed at No-Flow [Hz]
Range:
Application [Application dependant]
dependent*
22-85 Speed at Design Point [RPM]
Range:
Application [Application dependant]
dependent*
22-86 Speed at Design Point [Hz]
Range:
Application [Application dependant]
dependent*
22-87 Pressure at No-Flow Speed
Range:
0.000 N/A* [Application dependant]
Please see also par. 22-82 Work Point Calculation point D.
118
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 parameter allows the calculation of the
unknown System Design Working Point at 50/60 Hz speed, from the input data set in
Speed at No-Flow [RPM] par. 22-84 Speed at No-Flow [Hz] , par. 22-87 Pressure at No-
par. 22-83
Flow Speed , par. 22-88 Pressure at Rated Speed , par. 22-89 Flow at Design Point and
Flow at Rated Speed .
par. 22-90
Function:
Resolution 0.033 Hz.
The speed of the motor at which flow has effectively stopped and minimum pressure H
should be entered here in Hz. Alternatively, the speed in RPM can be entered in par. 22-83
at No-Flow [RPM] . If it has been decided to use Hz in par. 0-02 Motor Speed Unit then
Speed at Design Point [Hz] should also be used. Closing the valves and reducing the
par. 22-86
speed until minimum pressure H is achieved will determine this value.
MIN
Function:
Resolution 1 RPM.
Work Point Calculation is set to Disable . The speed of the motor at
Only visible when par. 22-82
which the System Design Working Point is achieved should be entered here in RPM. Alternatively,
the speed in Hz can be entered in par. 22-86
use RPM in par. 0-02 Motor Speed Unit then par. 22-83 Speed at No-Flow [RPM] should also be
used.
Function:
Resolution 0.033 Hz.
Work Point Calculation is set to Disable . The speed of the motor at
Only visible when par. 22-82
which the System Design Working Point is achieved should be entered here in Hz. Alternatively, the
speed in RPM can be entered in par. 22-85
use Hz in par. 0-02 Motor Speed Unit , then par. 22-83 Speed at No-Flow [RPM] should also be used.
Function:
Enter the pressure H corresponding to Speed at No Flow in Reference/Feedback Units.
MIN
®
MG.20.T1.02 - VLT is a registered Danfoss trademark
VLT AQUA Low Harmonic Drive Operating In-
Speed at Design Point [Hz] . If it has been decided to
Speed at Design Point [RPM] . If it has been decided to
structions
is achieved
MIN
Speed