22-43 Wake-up Speed [Hz]
Range:
Function:
0 Hz
*
[par. 4-12
- par. 4-14
Hz]
To be used if
0-02 Motor Speed Unit
has been
set for Hz (parameter not visible if RPM
selected). Only to be used if
is set for open-loop and speed
reference is applied by an external controller
controlling the pressure.
Set the reference speed at which sleep mode
should be canceled.
22-44 Wake-up Ref./FB Difference
Range:
Function:
10%
*
[0–
100%]
Only to be used if
is
set for closed-loop and the integrated PI
controller is used for controlling the pressure.
Set the pressure drop allowed in percentage
of setpoint for the pressure (Pset) before
canceling sleep mode.
NOTE!
If used in an application where the
integrated PI controller is set for inverse
control in
20-71 Tuning Mode
, the value
set in
22-44 Wake-up Ref./FB Difference
will
automatically be added.
22-45 Setpoint Boost
Range:
Function:
0
%
*
[-100
- 100
%]
Only to be used if
, is set
for closed-loop and the integrated PI controller is
used. For example, in systems with constant
pressure control, it is advantageous to increase
the system pressure before the motor is stopped.
This will extend the time during which the motor
is stopped and help to avoid frequent start/stop.
Set the desired overpressure/temperature as a
percentage of the setpoint for the pressure (Pset)/
temperature before entering sleep mode.
If set at 5%, the boost pressure will be Pset*1.05.
The negative values can be used, for example, for
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
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,
22-46 Maximum Boost Time
Range:
Function:
sleep mode will be entered and will not wait 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 The drive will continue to run, but activate a End
of Curve warning [W94]. A drive digital output or
a serial communication bus can communicate a
warning to other equipment.
[2]
Alarm
The drive will stop running and activate a End of
Curve alarm [A 94]. A drive digital output or a
serial communication bus can communicate an
alarm to other equipment.
NOTE!
Automatic restart will reset the alarm and start the system
again.
NOTE!
Do not set
14-20 Reset Mode
, to [13] Infinite auto reset,
when
is set to [2] Alarm. Doing
so will cause the drive to continuously cycle between
running and stopping when a End of Curve condition is
detected.
NOTE!
If the drive is equipped with a constant speed bypass with
an automatic bypass function that starts the bypass if the
drive experiences a persistent alarm condition, be sure to
disable the bypass’s automatic bypass function, if [2] Alarm
or [3] Man. Reset Alarm is selected as the End of Curve
Function.
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
will be activated. If the condition disappears
before the timer expires, the timer will be reset.
How to program the adjustab...
VLT AQUA 12-Pulse High Power Instruction Manual
6-28
MG.20.Y1.22 - VLT
®
is a registered Danfoss trademark
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