Danfoss VLT Programming Guide

5-50 Term. 29 Low Frequency
Range: Function:
100 Hz* [0 - 110000 Hz] Enter the low frequency limit corresponding to the low motor shaft speed (i.e. low reference value)
in par. 5-52
Term. 29 Low Ref./Feedb. Value . Refer to the diagram in this section.
5-51 Term. 29 High Frequency
Range: Function:
100 Hz* [0 - 110000 Hz] Enter the high frequency limit corresponding to the high motor shaft speed (i.e. high reference
value) in par. 5-53
Term. 29 High Ref./Feedb. Value .
5-52 Term. 29 Low Ref./Feedb. Value
Range: Function:
0.000 N/A* [-999999.999 - 999999.999 N/A] Enter the low reference value limit for the motor shaft speed [RPM]. This is also the lowest feedback
value, see also par. 5-57
Term. 33 Low Ref./Feedb. Value .
5-53 Term. 29 High Ref./Feedb. Value
Range: Function:
100.000 N/
A*
[-999999.999 - 999999.999 N/A] Enter the high reference value [RPM] for the motor shaft speed and the high feedback value, see
also par. 5-58
Term. 33 High Ref./Feedb. Value .
5-54 Pulse Filter Time Constant #29
Range: Function:
100 ms* [1 - 1000 ms] Enter the pulse filter time constant. The pulse filter dampens oscillations of the feedback signal,
which is an advantage if there is a lot of noise in the system. A high time constant value results in
better dampening but also increases the time delay through the filter.
This parameter cannot be adjusted while the motor is running.
5-55 Term. 33 Low Frequency
Range: Function:
100 Hz* [0 - 110000 Hz] Enter the low frequency corresponding to the low motor shaft speed (i.e. low reference value) in
par. 5-57
Term. 33 Low Ref./Feedb. Value .
5-56 Term. 33 High Frequency
Range: Function:
100 Hz* [0 - 110000 Hz] Enter the high frequency corresponding to the high motor shaft speed (i.e. high reference value) in
par. 5-58
Term. 33 High Ref./Feedb. Value .
5-57 Term. 33 Low Ref./Feedb. Value
Range: Function:
0.000 N/A* [-999999.999 - 999999.999 N/A] Enter the low reference value [RPM] for the motor shaft speed. This is also the low feedback value,
see also par. 5-52
Term. 29 Low Ref./Feedb. Value .
VLT
®
HVAC Drive Programming Guide 3 Parameter Description
MG.11.C9.02 - VLT
®
is a registered Danfoss trademark 89
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)