Danfoss VLT AQUA High Power Operation Instructions Manual page 130

5 How to programme the frequency converter
22-43 Wake-up Speed [Hz]
Range:
0 Hz* [par. 4-12 - par. 4-14 Hz]
22-44 Wake-up Ref./FB Difference
Range:
10%* [0-100%]
5
22-45 Setpoint Boost
Range:
0 %* [-100 - 100 %]
22-46 Maximum Boost Time
Range:
60 s* [0 - 600 s]
22-50 End of Curve Function
Option:
[0] * Off
[1] Warning
[2] Alarm
NB!
Automatic restart will reset the alarm and start the system again.
22-51 End of Curve Delay
Range:
10 s* [0 - 600 s]
130
Function:
Motor Speed Unit
To be used if par. 0-02
Configuration Mode
Only to be used if par. 1-00
by an external controller controlling the pressure.
Set the reference speed at which the Sleep Mode should be cancelled.
Function:
Configuration Mode
Only to be used if par. 1-00,
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
in par. 20-71, PID, Normal/Inverse Control
tomatically be added.
Function:
Configuration Mode
Only to be used if par. 1-00
troller 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)/tem-
perature 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
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.
Function:
End of Curve monitoring not active.
A warning is issued in the display [W94].
An alarm is issued and the frequency converter trips. A message [A94] appears in the display.
Function:
When an End of Curve condition is detected, a timer is activated. When the time set in this parameter
expires, and the End of Curve condition has been steady in the entire period, the function set in
par. 22-50 End of Curve Function will be activated. If the condition disappears before the timer
expires, the timer will be reset.
®
MG.20.P3.02 - VLT is a registered Danfoss trademark
VLT AQUA High Power Operation Instructions
, has been set for Hz (parameter not visible if RPM selected).
, is set for Open Loop and speed reference is applied
, is set for Closed Loop and the integrated PI
, the value set in par. 22-44 will au-
, is set for Closed Loop and the integrated PI con-
is set for Closed Loop and the integrated PI controller