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Danfoss VLT Programming Guide

Danfoss VLT
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6-51 Terminal 42 Output Min Scale
Range: Function:
0.00 %* [0.00 - 200.00 %] Scale for the minimum output (0 or 4 mA) of the analogue signal at terminal 42.
Set the value to be the percentage of the full range of the variable selected in par. 6-50
Terminal
42 Output
.
6-52 Terminal 42 Output Max Scale
Range: Function:
100.00 %* [0.00 - 200.00 %] Scale for the maximum output (20 mA) of the analog signal at terminal 42.
Set the value to be the percentage of the full range of the variable selected in par. 6-50
Terminal
42 Output
.

It is possible to get a value lower than 20 mA at full scale by programming values >100% by using
a formula as follows:
20
mA
/
desired
maximum
current
× 100 %
i
.
e
. 10
mA
:
20
mA
10
mA
× 100 % = 200 %
EXAMPLE 1:
Variable value= OUTPUT FREQUENCY, range = 0-100 Hz
Range needed for output = 0-50 Hz
Output signal 0 or 4 mA is needed at 0 Hz (0% of range) - set par. 6-51
Terminal 42 Output Min Scale
to 0%
Output signal 20 mA is needed at 50 Hz (50% of range) - set par. 6-52
Terminal 42 Output Max Scale
to 50%

EXAMPLE 2:
Variable= FEEDBACK, range= -200% to +200%
Range needed for output= 0-100%
Output signal 0 or 4 mA is needed at 0% (50% of range) - set par. 6-51
Terminal 42 Output Min Scale
to 50%
Output signal 20 mA is needed at 100% (75% of range) - set par. 6-52
Terminal 42 Output Max Scale
to 75%
VLT
®
HVAC Drive Programming Guide 3 Parameter Description
MG.11.C9.02 - VLT
®
is a registered Danfoss trademark
99
3

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Danfoss VLT Specifications

General IconGeneral
Frequency50/60 Hz
EnclosureIP20, IP21, IP55, IP66
SeriesVLT
Control TechniqueFlux Vector Control
Output Voltage0-Vinput
Control MethodFieldbus
Communication InterfacePROFIBUS, CANopen
Protection FeaturesOverload, Overvoltage, Undervoltage, Short Circuit, Ground Fault
Cooling MethodLiquid Cooled
Storage Temperature-25°C to +70°C
Relative Humidity5-95% non-condensing
AltitudeUp to 1000m (3280ft) without derating, up to 4000m (13120ft) with derating
Operating Temperature-10°C to +50°C (14°F to 122°F)

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