Danfoss VLT Programming Guide

3.5 Main Menu - Reference/Ramps - Group 3
3.5.1 3-0* Reference Limits
Parameters for setting the reference unit, limits and ranges.
Please see also par. 20-0* for information on settings in closed loop.
3-02 Minimum Reference
Range: Function:
Application
dependent*
[Application dependant] Enter the Minimum Reference. The Minimum Reference is the lowest value obtainable by summing
all references. The Minimum Reference value and unit matches the configuration choice made in
par. 1-00
Configuration Mode and par. 20-12 Reference/Feedback Unit , respectively.
NB!
This parameter is used in open loop only.
3-03 Maximum Reference
Range: Function:
Application
dependent*
[Application dependant] Enter the maximum acceptable value for the remote reference. The Maximum Reference value and
unit matches the configuration choice made in par. 1-00
Configuration Mode and par. 20-12 Ref-
erence/Feedback Unit
, respectively.
NB!
If operating with par. 1-00
Configuration Mode set for Closed Loop [3],
par. 20-14
Maximum Reference/Feedb. must be used.
3-04 Reference Function
Option: Function:
[0] Sum Sums both external and preset reference sources.
[1] External/Preset Use either the preset or the external reference source.
Shift between external and preset via a command on a digital input.
3.5.2 3-1* References
Parameters for setting up the reference sources.
Select the preset reference(s).
Select Preset ref. bit 0 / 1 / 2 [16], [17] or [18] for the corresponding digital inputs in par. group 5-1*.
3-10 Preset Reference
Array [8]
Range: Function:
0.00 %* [-100.00 - 100.00 %] Enter up to eight different preset references (0-7) in this parameter, using array programming. The
preset reference is stated as a percentage of the value Ref
MAX
(par. 3-03 Maximum Reference , for
closed loop see par. 20-14
Maximum Reference/Feedb. ). When using preset references, select Pre-
set ref. bit 0 / 1 / 2 [16], [17] or [18] for the corresponding digital inputs in parameter group 5-1*
Digital Inputs.
VLT
®
HVAC Drive Programming Guide 3 Parameter Description
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®
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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)