Minimum Run Time; Minimum Sleep Time; Wake-Up Speed; Wake-Up Ref./Fb Difference - Danfoss VLT Programming Manual

®
VLT HVAC Drive Programming Guide
No Flow detection (pumps only)
Low speed detection
External signal
Pressure/Temperature (transmit-
ter connected)
Output frequency
NB!
Sleep Mode will not be active when Local Reference is active (set speed manually by means of arrow buttons on the LCP). See
Reference Site
par. 3-13
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]

22-41 Minimum Sleep Time

Range:
10 s* [0 - 600 s]
22-42 Wake-up Speed [RPM]
Range:
Application [Application dependant]
dependent*
22-43 Wake-up Speed [Hz]
Range:
Application [Application dependant]
dependent*

22-44 Wake-up Ref./FB Difference

Range:
10 %* [0 - 100 %]
NB!
If used in application where the integrated PI controller is set for inverse control (e.g. cooling tower applications) in par. 20-71
Performance
, the value set in par. 22-44
Internal PI Controller
(par. 1-00 Configuration Mode : Closed loop)
Sleep mode Wake up
Yes
Yes
Yes
Yes
No
.
Function:
Set the desired minimum running time for the motor after a start command (digital input or Bus)
before entering Sleep Mode.
Function:
Set the desired Minimum Time for staying in Sleep Mode. This will override any wake up conditions.
Function:
To be used if par. 0-02
Only to be used if par. 1-00
by an external controller.
Set the reference speed at which the Sleep Mode should be cancelled.
Function:
To be used if par. 0-02
Only to be used if par. 1-00
by an external controller controlling the pressure.
Set the reference speed at which the Sleep Mode should be cancelled.
Function:
Only to be used if par. 1-00
is used for controlling the pressure.
Set the pressure drop allowed in percentage of set point for the pressure (Pset) before cancelling
the Sleep Mode.
Wake-up Ref./FB Difference
MG.11.C9.02 - VLT ® is a registered Danfoss trademark
External PI Controller or manual control
(par. 1-00 Configuration Mode
Sleep mode
Yes (except manual setting
of speed)
Yes
Yes
Motor Speed Unit
has been set for RPM (parameter not visible if Hz selected).
Configuration Mode
is set for Open Loop and speed reference is applied
Motor Speed Unit
, has been set for Hz (parameter not visible if RPM selected).
Configuration Mode
, is set for Open Loop and speed reference is applied
Configuration Mode
is set for Closed Loop and the integrated PI controller
will automatically be added.
3 Parameter Description
: Open loop)
Wake up
No
Yes
3
PID
209