6-50 Terminal 42 Output
Option:
Function:
[140]
Bus ctrl. 4-20 mA
0 - 100%
[141]
Bus ctrl t.o.
0 - 100%, (0-20 mA)
[142]
Bus ctrl t.o.
4-20mA
0 - 100%
[143]
Ext. CL 1 4-20mA
0 - 100%
[144]
Ext. CL 2 4-20mA
0 - 100%
[145]
Ext. CL 3 4-20mA
0 - 100%
NOTE
Values for setting the Minimum Reference is found in open
loop
and for closed loop
20-13 Minimum Reference/Feedb.
- values for maximum
reference for open loop is found in
3-03 Maximum
Reference
and for closed loop
6-51 Terminal 42 Output Min Scale
Range:
Function:
0.00 %
*
[0.00 -
200.00 %]
Scale for the minimum output (0 or
4mA) of the analog signal at terminal 42.
Set the value to be the percentage of
the full range of the variable selected in
.
6-52 Terminal 42 Output Max Scale
Range:
Function:
100.00
%
*
[0.00 -
200.00
%]
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
130BA075.12
(mA)
0%
20
0/4
100%
Current
Analogue
output
Min Scale
par. 6-93
Variable
for
output
example:
Speed
(RPM)
Analogue
Output
Max Scale
par. 6-94
It is possible to get a value lower than 20mA
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 = 0-50Hz
Output signal 0 or 4mA is needed at 0Hz (0% of range) -
set
6-51 Terminal 42 Output Min Scale
to 0%
Output signal 20mA is needed at 50Hz (50% of range) - set
6-52 Terminal 42 Output Max Scale
to 50%
0/4 mA
20 mA
50%
100%
0%
50Hz
100Hz
0Hz
130BA858.10
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
6-51 Terminal 42 Output Min Scale
to 50%
Output signal 20mA is needed at 100% (75% of range) -
set
6-52 Terminal 42 Output Max Scale
to 75%
0/4 mA
20 mA
50%
75%
100%
0%
0%
+100%
+200%
-200%
130BA856.10
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
6-51 Terminal 42 Output Min Scale
to 0%
Output signal 10mA is needed at Max ref (100% of range) -
set
6-52 Terminal 42 Output Max Scale
to 200%
(20mA/10mA x 100%=200%).
Parameter Description
VLT
®
HVAC Drive Programming Guide
MG.11.CC.02 - VLT
®
is a registered Danfoss trademark
79
3
3
