[139] Bus ctrl. 0 - 100%, (0-20 mA)
[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%
NB!
Values for setting the Minimum Reference is found in open loop par. 3-02
Minimum Reference
and for closed loop par. 20-13
Minimum Reference/
Feedb.
- values for maximum reference for open loop is found in par. 3-03
Maximum Reference
and for closed loop par. 20-14
Maximum Reference/
Feedb.
.
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%
6 How to Programme the Low Harmonic Drive
VLT HVAC Low Harmonic Drive Operating In-
structions
108 MG.16.A1.02 - VLT
®
is a registered Danfoss trademark
6
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