Danfoss VLT AQUA Drive FC 202 Programming Manual page 187

Parameter Description
22-41 Minimum Sleep Time
Range: Function:
30 s [0 - 600 s] Set the minimum time for staying in sleep
*
mode. This setting overrides any wake-up
conditions.
22-42 Wake-up Speed [RPM]
Range: Function:
Size [ 0 - To be used if parameter 0-02 Motor Speed
related par. Unit has been set for [0] RPM (parameter
*
4-13 not visible if [1] Hz is selected). Only to be
RPM] used if parameter 1-00 Configuration Mode is
set for [0] Open loop and an external
controller applies speed reference.
Set the reference speed at which the sleep
mode should be canceled.
22-43 Wake-up Speed [Hz]
Range: Function:
Size [ 0 - To be used if parameter 0-02 Motor Speed
related par. Unit has been set for [1] Hz (parameter not
*
visible if [0] RPM is selected). Only to be used
4-14
Hz] if parameter 1-00 Configuration Mode is set
for [0] 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 canceled.
22-44 Wake-up Ref./FB Difference
Range: Function:
10 [0 - Only to be used if parameter 1-00 Configuration
% 100 %] Mode is set to [3] 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 (P
the sleep mode.
NOTICE
If used in applications where the integrated
PI controller is set for inverse control in
parameter 20-71 Controller Performance, the
value set in parameter 22-44 Wake-up
Ref./FB Difference is automatically added.
22-45 Setpoint Boost
Range: Function:
0 % [-100 Only to be used if parameter 1-00 Configuration
- Mode is set to [3] Closed Loop and the integrated
*
100 %] PI controller is used. In systems with, for example,
constant pressure control, it is advantageous to
increase the system pressure before the motor is
stopped. This extends the time in which the motor
is stopped and helps to avoid frequent start/stop.
MG20OB02
Programming Guide
22-45 Setpoint Boost
Range:
22-46 Maximum Boost Time
Range:
60
s
*
3.19.5 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.
The frequency converter initiates the function selected in
parameter 22-50 End of Curve Function in the following
conditions:
) before canceling
set
It is possible to obtain a signal on 1 of the digital outputs
by selecting [192] End of Curve in parameter group 5-3*
Digital Outputs and/or parameter group 5-4* Relays. The
signal is present when an end-of-curve condition occurs
and the selection in parameter 22-50 End of Curve Function
is different from [0] Off. The end-of-curve function can only
be used when operating with the built-in PID controller
([3] Closed Loop in parameter 1-00 Configuration Mode).
Danfoss A/S © 05/2018 All rights reserved.
Function:
Set the overpressure/overtemperature in
percentage of setpoint for the pressure (P
temperature before entering sleep mode.
If set to 5%, the boost pressure is P
negative values can be used, for example, in
cooling tower control where a negative change is
needed.
Function:
[0 - Only to be used if parameter 1-00 Configuration
600 s] Mode is set to [3] Closed Loop and the integrated
PI controller is used for controlling the pressure.
Set the maximum time for which boost mode is
allowed. If the set time is exceeded, sleep mode is
entered, not waiting for the set boost pressure to
be reached.
•
The frequency converter is running at maximum
speed (parameter 4-13 Motor Speed High Limit
[RPM] or parameter 4-14 Motor Speed High Limit
[Hz]).
•
The feedback signal is less than the pressure
setpoint by a value that is equal to or exceeds
2.5% of the value in parameter 3-03 Maximum
Reference.
•
The conditions are active for a time set in
parameter 22-51 End of Curve Delay.
)/
set
3 3
x1.05. The
set
185