22-42 Wake-Up Speed [RPM]
Range:
Function:
[par. 4-11 Motor Speed Low Limit -
par. 4-13 Motor Speed High Limit]
To be used if par. 0-02
Motor Speed Unit
has been set for RPM (parameter not visible if Hz selected). Only to be
used if par. 1-00
Configuration Mode
is set for Open Loop and speed reference is applied by an external controller.
Set the reference speed at which the Sleep Mode should be cancelled.
22-43 Wake-up Speed [Hz]
Range:
Function:
[Par. 4-12 (Motor Speed Low Limit)
- Par. 4-14 (Motor Speed High Limit)]
To be used if par. 0-02,
Motor Speed Unit
, has been set for Hz (parameter not visible if RPM selected). Only to
be used if par. 1-00,
Configuration Mode
, is set for Open Loop and speed reference is applied by an external
controller controlling the pressure.
Set the reference speed at which the Sleep Mode should be cancelled.
22-44 Wake-up Ref./FB Difference
Option:
Function:
[10%]
*
0-100%
Only to be used if par. 1-00,
Configuration Mode
, is set for Closed Loop and the integrated PI controller is used
for controlling the pressure.
Set the pressure drop allowed in percentage of set point for the pressure (Pset) before cancelling the Sleep
Mode.
NB!
If used in application where the integrated PI controller is set for inverse control (e.g. cooling tower applications) in par. 20-71,
PID,
Normal/Inverse Control
, the value set in par. 22-44 will automatically be added.
22-45 Set Point Boost
Range:
Function:
0%
*
[-100% - +100%]
Only to be used if par. 1-00,
Configuration Mode
, is set for Closed Loop and the integrated PI controller is used.
In systems with e.g. constant pressure control, it is advantageous to increase the system pressure before the
motor is stopped. This will extend the time in which the motor is stopped and help to avoid frequent start/stop.
Set the desired over pressure/temperature in percentage of set point for the pressure (Pset)/temperature before
entering the Sleep Mode.
If setting for 5%, the boost pressure will be Pset*1.05. The negative values can be used for e.g. cooling tower
control where a negative change is needed.
22-46 Maximum Boost Time
Range:
Function:
60 sec.
*
[0-600 sec.]
Only to be used if par. 1-00,
Configuration Mode
, is set for Closed Loop and the integrated PI controller is used
for controlling the pressure.
Set the maximum time for which boost mode will be allowed. If the set time is exceeded, Sleep Mode will be
entered, not waiting for the set boost pressure to be reached.
3.20.4. 22-5* End of Curve
The End of Curve conditions occur when a pump is yielding a too large volume to ensure the set pressure. This can occur if there is a leakage in the
distribution pipe system after the pump causing the pump to operate at the end of the pump characteristic, valid for the max. speed set in par. 4-13 or
4-14
Motor Speed High Limit
.
In case the feed back is 2.5% of the programmed value in par. 3-03, Maximum Reference (or numerical value of 3-02, Minimum Reference, whichever
is highest) below the set point for the desired pressure for a set time (par. 22-51
End of Curve Delay
), and the pump is running with max. speed set in
par. 4-13 or 4-14
Motor Speed High Limit
, - the function selected in par. 22-50
End of Curve Function
, will take place.
It is possible to get a signal on one of the digital outputs by selecting End of Curve [192] in par. 5-3*
Digital Outputs
and/or par. 5-4*
Relays
. The signal
will be present, when an End of Curve condition occurs and the selection in par. 22-50
End of Curve Function
, is different from Off. The end of curve
function can only be used when operating with the built-in PID controller (Closed loop in par. 1.00
Configuration Mode
).
VLT
®
HVAC Drive Programming Guide
3. Parameter Description
MG.11.C5.02 - VLT
®
is a registered Danfoss trademark
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