Danfoss VLT Programming Guide

Internal PI Controller
(par. 1-00
Configuration Mode : Closed loop)
External PI Controller or manual control
(par. 1-00
Configuration Mode : Open loop)
Sleep mode Wake up Sleep mode Wake up
No Flow detection (pumps only) Yes Yes (except manual setting
of speed)
Low speed detection Yes Yes
External signal Yes Yes
Pressure/Temperature (transmit-
ter connected)
Yes No
Output frequency No Yes
NB!
Sleep Mode will not be active when Local Reference is active (set speed manually by means of arrow buttons on the LCP). See
par. 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: 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 will override any wake up conditions.
22-42 Wake-up Speed [RPM]
Range: Function:
Application
dependent*
[Application dependant] To be used if par. 0-02 Motor Speed Unit has been set for RPM (parameter not visible if Hz selected).
Only to be used if par. 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.
22-43 Wake-up Speed [Hz]
Range: Function:
Application
dependent*
[Application dependant] To be used if par. 0-02 Motor Speed Unit , has been set for Hz (parameter not visible if RPM selected).
Only to be used if par. 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.
22-44 Wake-up Ref./FB Difference
Range: Function:
10 %* [0 - 100 %] Only to be used if par. 1-00 Configuration Mode is set for Closed Loop and the integrated PI controller
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.
NB!
If used in application where the integrated PI controller is set for inverse control (e.g. cooling tower applications) in par. 20-71
PID
Performance
, the value set in par. 22-44 Wake-up Ref./FB Difference will automatically be added.
VLT
®
HVAC Drive Programming Guide 3 Parameter Description
MG.11.C9.02 - VLT
®
is a registered Danfoss trademark 209
3

Danfoss VLT Specifications

General

Frequency	50/60 Hz
Enclosure	IP20, IP21, IP55, IP66
Series	VLT
Control Technique	Flux Vector Control
Output Voltage	0-Vinput
Control Method	Fieldbus
Communication Interface	PROFIBUS, CANopen
Protection Features	Overload, Overvoltage, Undervoltage, Short Circuit, Ground Fault
Cooling Method	Liquid Cooled
Storage Temperature	-25°C to +70°C
Relative Humidity	5-95% non-condensing
Altitude	Up to 1000m (3280ft) without derating, up to 4000m (13120ft) with derating
Operating Temperature	-10°C to +50°C (14°F to 122°F)