Danfoss VLT Series Programming Manual page 153

Parameter Description
p
(Pressure)
P
Set
3 3
f f
(Frequency)
Ref Out
f
Ref /
f
Wake
No/Low Flow
detected
Configuration possibilities, overview:
No Flow detection (pumps
only)
Low speed detection
External signal
Pressure/Temperature
(transmitter connected)
Output frequency
NOTE
Sleep Mode will not be active when Local Reference is
active (set speed manually by means of arrow buttons on
the LCP). See 3-13 Reference Site.
Does not work in Hand-mode. Auto set-up in open loop
must be carried out before setting input/output in closed
loop.
22-40 Minimum Run Time
Range:
10 s [0 - 600 s] Set the desired minimum running time for
*
22-41 Minimum Sleep Time
Range:
10 s [0 - 600 s] Set the desired Minimum Time for staying in
*
152
VLT
p
System
f
Out
f
Ref
t f
1
Out
Sleep mode
activated
P
Ref
Internal PI Controller
(1-00 Configuration Mode: Closed loop)
Sleep mode
Yes
Yes
Yes
Function:
the motor after a start command (digital
input or Bus) before entering Sleep Mode.
Function:
Sleep Mode. This will override any wake up
conditions.
MG.11.CC.02 - VLT
®
HVAC Drive Programming Guide
When low power or low speed is detected the motor is
stopped, but the reference signal (f
controller is still monitored and because of the low
pressure created, the controller will increase the reference
signal to gain pressure. When the reference signal has
reached a set value f
The speed is set manually by an external reference signal
Time
(Remote Reference). The settings (parameter group 22-3*)
for tuning of the No Flow function must be set to default.
Time
= P
Wake
Wake up
Yes
No
22-42 Wake-up Speed [RPM]
Range:
Size
related
*
22-43 Wake-up Speed [Hz]
Range:
Size
related
*
®
is a registered Danfoss trademark
) from the external
ref
the motor restarts.
wake
External PI Controller or manual control
(1-00 Configuration Mode: Open loop)
Sleep mode Wake up
Yes (except manual
setting of speed)
Yes
Yes
No
Yes
Function:
[ par. To be used if 0-02 Motor Speed Unit has
4-11 - par. been set for RPM (parameter not visible
4-13 RPM] if Hz selected). Only to be used if
1-00 Configuration Mode is set for Open
Loop and speed reference is applied by
an external controller.
Set the reference speed at which the
Sleep Mode should be cancelled.
Function:
[ par. To be used if 0-02 Motor Speed Unit, has
4-12 - par. been set for Hz (parameter not visible if
4-14 Hz] RPM selected). Only to be used if
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 the
Sleep Mode should be cancelled.