Danfoss Metasys N2 Programming Guide

22-40 Minimum Run Time
Range: Function:
10 s* [0 - 600 s] Set the desired minimum running time for
the motor after a start command (digital
input or bus) before entering sleep mode.
22-41 Minimum Sleep Time
Range: Function:
10 s* [0 - 600 s] Set the desired minimum time for staying in
sleep mode. This setting overrides any wake-
up conditions.
22-42 Wake-up Speed [RPM]
Range: Function:
Size
related*
[ par.
4-11 -
par. 4-13
RPM]
To be used if parameter 0-02 Motor Speed
Unit has been set for [0] RPM (parameter
not visible if [1] Hz is selected). Only to be
used if parameter 1-00 Conguration Mode is
set for open loop and an external controller
applies speed reference.
Set the reference speed at which the sleep
mode should be cancelled.
22-43 Wake-up Speed [Hz]
Range: Function:
Size
related*
[ par.
4-12 -
par.
4-14 Hz]
To be used if parameter 0-02 Motor Speed
Unit has been set for [1] Hz (parameter not
visible if [0] RPM is selected). Only to be
used if parameter 1-00 Conguration 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 cancelled.
22-44 Wake-up Ref./FB Dierence
Range: Function:
10
%*
[0 -
100 %]
Only to be used if parameter 1-00 Conguration
Mode is set for [3] Process 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
set
) before cancelling
the sleep mode.
22-45 Setpoint Boost
Range: Function:
0
%*
[-100
- 100
%]
Only to be used if parameter 1-00 Conguration
Mode is set to [3] Closed Loop and the integrated
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.
22-45 Setpoint Boost
Range: Function:
Set the desired overpressure/temperature in
percentage of setpoint for the pressure (P
set
)/
temperature before entering sleep mode.
If set to 5%, the boost pressure is P
set
*1.05. The
negative values can be used, for example, 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 parameter 1-00 Conguration
Mode is set to [3] Process 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.
3.20.4 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 after the pump causing the pump to operate at the
end of the pump characteristic, valid for the max. speed
set in parameter 4-13 Motor Speed High Limit [RPM] or
parameter 4-14 Motor Speed High Limit [Hz].
If the feedback is 2.5% of the programmed value in
parameter 20-14 Maximum Reference/Feedb. (or numerical
value of parameter 20-13 Minimum Reference/Feedb.
whichever is highest) below the set point for the desired
pressure for a set time (parameter 22-51 End of Curve
Delay), and the pump is running with maximum speed set
in parameter 4-13 Motor Speed High Limit [RPM] or
parameter 4-14 Motor Speed High Limit [Hz], the function
selected in parameter 22-50 End of Curve Function takes
place.
It is possible to get 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
dierent from [0] O. The end-of-curve function can only
be used when operating with the built-in PID controller
([3] Closed loop in parameter 1-00
Conguration Mode).
Parameter Descriptions
Programming Guide
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Danfoss Metasys N2 Specifications

General

Brand	Danfoss
Model	Metasys N2
Category	DC Drives
Language	English