Danfoss VLT FC 100 Series Programming Manual page 181

®
VLT HVAC Drive Programming Guide
22-42 Wake-Up Speed [RPM]
Range:
[par. 4-11 Motor Speed Low Limit -
par. 4-13 Motor Speed High Limit]
22-43 Wake-up Speed [Hz]
Range:
[Par. 4-12 (Motor Speed Low Limit)
- Par. 4-14 (Motor Speed High Limit)]
22-44 Wake-up Ref./FB Difference
Option:
* 0-100%
[10%]
NB!
If used in application where the integrated PI controller is set for inverse control (e.g. cooling tower applications) in par. 20-71,
Normal/Inverse Control
22-45 Set Point Boost
Range:
*
0% [-100% - +100%]
22-46 Maximum Boost Time
Range:
*
60 sec. [0-600 sec.]
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
Motor Speed High Limit
par. 4-13 or 4-14
It is possible to get a signal on one of the digital outputs by selecting End of Curve [192] in par. 5-3*
will be present, when an End of Curve condition occurs and the selection in par. 22-50
function can only be used when operating with the built-in PID controller (Closed loop in par. 1.00
Function:
Motor Speed Unit
To be used if par. 0-02
Configuration Mode
used if par. 1-00 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.
Function:
Motor Speed Unit
To be used if par. 0-02,
Configuration Mode
be used if par. 1-00,
controller controlling the pressure.
Set the reference speed at which the Sleep Mode should be cancelled.
Function:
Only to be used if par. 1-00, Configuration Mode
for controlling the pressure.
Set the pressure drop allowed in percentage of set point for the pressure (Pset) before cancelling the Sleep
Mode.
, the value set in par. 22-44 will automatically be added.
Function:
Only to be used if par. 1-00, Configuration Mode
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.
Function:
Only to be used if par. 1-00, Configuration Mode
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.
, - the function selected in par. 22-50
MG.11.C5.02 - VLT ® is a registered Danfoss trademark
has been set for RPM (parameter not visible if Hz selected). Only to be
, has been set for Hz (parameter not visible if RPM selected). Only to
, is set for Open Loop and speed reference is applied by an external
, is set for Closed Loop and the integrated PI controller is used
, is set for Closed Loop and the integrated PI controller is used.
, is set for Closed Loop and the integrated PI controller is used
End of Curve Delay
), and the pump is running with max. speed set in
End of Curve Function
, will take place.
Digital Outputs
End of Curve Function , is different from Off. The end of curve
Configuration Mode
3. Parameter Description
PID,
Relays
and/or par. 5-4* . The signal
).
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