Danfoss vlt FC 102 Programming Guide

22-41 Minimum Sleep Time
Range: Function:
10 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
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 [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
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 canceled.
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 canceling 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
22-45 Setpoint Boost
Range: Function:
motor is stopped and helps to
avoid frequent start/stop.
Set the overpressure/overtem-
perature in percentage of the
setpoint for the pressure (P
set
)/
temperature before entering sleep
mode.
If set to 5%, the boost pressure is
P
set
x1.05. The negative values can
be used, for example, in 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] 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
situation 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
maximum 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 setpoint for the required
pressure for a set time (parameter 22-51 End of Curve
Delay), and the pump runs 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
VLT
®
HVAC Drive FC 102
206 Danfoss A/S © 10/2019 All rights reserved. M0010001
33

Danfoss vlt FC 102 Specifications

General

Brand	Danfoss
Model	vlt FC 102
Category	DC Drives
Language	English