Danfoss VLT AQUA Drive FC 202 Programming Manual page 88

Parameter Description
6-52 Terminal 42 Output Max Scale
Range:
100 [0 -
% 200
*
%]
3 3
20 mA / desired maximum current × 100%
20 mA
i . e . 10 mA :
10 mA
Example 1:
Variable value= OUTPUT FREQUENCY, range = 0-100 Hz
Range needed for output = 0-50 Hz
Output signal 0 or 4mA 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%
20 mA
0/4 mA
0%
0Hz
Illustration 3.33 Example 1
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 parameter 6-51 Terminal 42 Output Min Scale to 50%
Output signal 20 mA is needed at 100% (75% of range) -
set parameter 6-52 Terminal 42 Output Max Scale to 75%
86
Function:
Scale for the maximum output (20mA) 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.
Current
(mA)
20
0/4
0% Analogue Analogue 100% Variable
output Output for
Min Scale Max Scale output
par. 6-93 par. 6-94 example:
Speed
(RPM)
Illustration 3.32 Output Current vs Reference
Variable
It is possible to get a value lower than 20mA at
full scale by programming values >100% by using
a formula as follows:
× 100% = 200%
50%
50Hz
Danfoss A/S © Rev. 2014-01-21 All rights reserved.
Programming Guide
20 mA
0/4 mA
0%
-200%
Illustration 3.34 Example 2
Example 3:
Variable value= REFERENCE, range= Min ref - Max ref
Range needed for output= Min ref (0%) - Max ref (100%),
0-10 mA
Output signal 0 or 4 mA is needed at Min ref - set
parameter 6-51 Terminal 42 Output Min Scale to 0%
Output signal 10 mA is needed at Max ref (100% of range)
- set parameter 6-52 Terminal 42 Output Max Scale to 200%
(20 mA/10 mA x 100%=200%).
20 mA
10 mA
0/4 mA
0%
Min ref
Illustration 3.35 Example 3
6-53 Terminal 42 Output Bus Control
100%
Range:
0 %
*
100Hz
6-54 Terminal 42 Output Timeout Preset
Range:
0 %
*
%]
50%
0%
100%
Max ref
Function:
[0 - 100 %] Holds the level of Output 42 if controlled by
bus.
Function:
[0 - 100 Holds the preset level of Output 42.
In case of a bus timeout and a timeout
function is selected in parameter 6-50 Terminal
42 Output, the output is preset to this level.
75% 100%
+100% +200%
200%
Max ref X 20/10
MG20O702