Danfoss VLT FC 100 Operating Instructions Manual page 121

6 How to Programme
6-52 Terminal 42 Output Max Scale
Range:
100.00 %* [0.00 - 200.00 %]
6
mA / desired maximum current × 100 %
20
mA
20
i . e . 10 mA :
× 100 % = 200 %
mA
10
EXAMPLE 1:
Variable value= OUTPUT FREQUENCY, range = 0-100 Hz
Range needed for output = 0-50Hz
Output signal 0 or 4mA is needed at 0Hz (0% of range) - set
par. 6-51 Terminal 42 Output Min Scale to 0%
Output signal 20mA is needed at 50Hz (50% of range) - set
Terminal 42 Output Max Scale to 50%
par. 6-52
20 mA
0/4 mA
0%
0Hz
EXAMPLE 2:
Variable= FEEDBACK, range= -200% to +200%
Range needed for output= 0-100%
Output signal 0 or 4mA is needed at 0% (50% of range) - set
par. 6-51 Terminal 42 Output Min Scale to 50%
Output signal 20mA is needed at 100% (75% of range) - set
Terminal 42 Output Max Scale to 75%
par. 6-52
120
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 par. 6-50
42 Output .
Current
(mA)
20
0/4
0% Analogue
output
Min Scale
par. 6-93
It is possible to get a value lower than 20mA at full scale by programming values >100% by us-
ing a formula as follows:
50% 100%
50Hz 100Hz
MG.11.F3.02 - VLT
VLT HVAC Drive High Power Operating In-
Analogue Variable
100%
Output for
Max Scale output
par. 6-94 example:
Speed
(RPM)
20 mA
0/4 mA
0%
-200%
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 4mA is needed at Min ref - set par. 6-51
Output Min Scale to 0%
Output signal 10mA is needed at Max ref (100% of range) - set
par. 6-52 Terminal 42 Output Max Scale to 200%
(20mA/10mA x 100%=200%).
® is a registered Danfoss trademark
Terminal
50% 75% 100%
0% +100% +200%
Terminal 42
structions