22-43 Wake-up Speed [Hz]
Range:
Function:
0 Hz*
[par. 4-12 - par. 4-14 Hz]
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
, 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
Range:
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
in par. 20-71,
PID, Normal/Inverse Control
, the value set in par. 22-44 will au-
tomatically be added.
22-45 Setpoint Boost
Range:
Function:
0 %*
[-100 - 100 %]
Only to be used if par. 1-00
, is set for Closed Loop and the integrated PI con-
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.
22-46 Maximum Boost Time
Range:
Function:
60 s*
[0 - 600 s]
Only to be used if par. 1-00
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.
22-50 End of Curve Function
Option:
Function:
[0] *
Off
End of Curve monitoring not active.
[1]
Warning
A warning is issued in the display [W94].
[2]
Alarm
An alarm is issued and the frequency converter trips. A message [A94] appears in the display.
NB!
Automatic restart will reset the alarm and start the system again.
22-51 End of Curve Delay
Range:
Function:
10 s*
[0 - 600 s]
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
will be activated. If the condition disappears before the timer
expires, the timer will be reset.
8. How to programme the frequency converter
VLT
®
AQUA Drive
Operating Instructions
100
MG.20.M5.02 - VLT
®
is a registered Danfoss trademark
8
