Danfoss VLT AQUA Drive FC 202 Programming Guide

6-50 Terminal 42 Output
Option: Function:
[157] Flow Rate
4-20mA
[254] DC Link
0-20mA
With this parameter selected, the terminal
output shows the scaled DC-link voltage.
Table 3.17 shows the relationship between
the DC-link voltage and the terminal output.
DC-link voltage (V) Terminal
output
V ≤undervoltage limit
0%
V ≥overvoltage limit
100%
Voltage within range:
Undervoltage <V
<overvoltage
Linearly
interpolated
Table 3.17 Relationship between the DC-
link Voltage and the Terminal Output
Table 3.18 shows the undervoltage and
overvoltage limits for dierent frequency
converter sizes.
Frequency
converter
size
Undervoltage
limit [V]
Overvoltage
limit [V]
T2/S2 185 410
T4/S4 373 855
T6/T7 553 1130
Table 3.18 Undervoltage and Overvoltage
Limits for Dierent Frequency Converter
Sizes
130BD613.10
I
20
10
0
400
800 1200
DCV
1
2
3
0
1 Analog output
2 Undervoltage limit
3 Overvoltage limit
Illustration 3.35 Example: The Analog
Output of Terminal 42 on the T4
Frequency Converter with Option [254] DC
Link 0–20 mA Selected
[255] DC Link
4-20mA
The function is the same as [254] DC Link 0–
20 mA.
6-51 Terminal 42 Output Min Scale
Range: Function:
0 %* [0 -
200 %]
Scale for the minimum output (0 mA or 4 mA)
of the analog signal at terminal 42.
Set the value to be the percentage of the full
range of the variable selected in
parameter 6-50 Terminal 42 Output.
6-52 Terminal 42 Output Max Scale
Range: Function:
100
%*
[0 -
200
%]
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
parameter 6-50 Terminal 42 Output.
e30ba075.14
(mA)
0%
20
0/4
100%
Current
Analog
output
min scale
par. 6-51
Variable
for
output
example:
Speed (RPM)
Analog
output
max scale
par. 6-52
Illustration 3.36 Output Current vs Reference
Variable
It is possible to obtain 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 . 10mA: 
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 mA or 4 mA is needed at 0 Hz (0% of
range). Set parameter 6-51 Terminal 42 Output Min Scale to
0%.
Output signal 20 mA is needed at 50 Hz (50% of range).
Set parameter 6-52 Terminal 42 Output Max Scale to 50%.
0/4 mA
20 mA
50% 100%0%
50Hz 100Hz0Hz
130BA858.10
Illustration 3.37 Example 1
Parameter Description
VLT
®
AQUA Drive FC 202
96 Danfoss A/S © 05/2018 All rights reserved. MG20OB02
33

Danfoss VLT AQUA Drive FC 202 Specifications

General

Brand	Danfoss
Model	VLT AQUA Drive FC 202
Category	DC Drives
Language	English