22-41 Minimum Sleep Time
Range:
Function:
10 s*
[0 - 600 s]
Set the desired minimum time for staying in sleep mode. This will override any wake-up conditions.
22-42 Wake-up Speed [RPM]
Range:
Function:
0 RPM*
[par. 4-11 - par. 4-13 RPM]
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 sleep mode should be canceled.
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
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 sleep mode should be canceled.
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 con-
troller is used for controlling the pressure.
Set the pressure drop allowed as a percentage of the setpoint for the pressure (Pset) before can-
celing sleep mode.
NOTE!
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
Configuration Mode
, 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 over pressure/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 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 and will not wait for the set boost pressure to be reached.
VLT
®
AQUA Drive
Instruction Manual
8 How to program the adjustable frequency
drive
MG.20.M5.22 - VLT
®
is a registered Danfoss trademark
8-39
8