Danfoss VLT HVAC Drive FC 102 - Page 89

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 3.31 Example 1
Example 2:
Variable=FEEDBACK, range=-200% to +200%.
Range needed for output=0–100%.
Output signal 0 mA 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%.
0/4 mA
20 mA
50% 75% 100%0%
0% +100% +200%-200%
130BA856.10
Illustration 3.32 Example 2
Example 3:
Variable value=REFERENCE, range=Minimum ref–maximum
ref.
Range needed for output=Minimum ref (0%)–Maximum ref
(100%), 0–10 mA.
Output signal 0 mA or 4 mA is needed at minimum ref. Set
parameter 6-51 Terminal 42 Output Min Scale to 0%.
Output signal 10 mA is needed at maximum 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
100% 200%
0%
Max ref Max ref X 20/10Min ref
130BA857.10
Illustration 3.33 Example 3
6-53 Terminal 42 Output Bus Control
Range: Function:
0 %* [0 - 100 %] Holds the level of output 42 if controlled by
bus.
6-54 Terminal 42 Output Timeout Preset
Range: Function:
0 %* [0 - 100
%]
Holds the preset level of output 42.
If a time-out function is selected in
parameter 6-50 Terminal 42 Output, the output
is preset to this level if a bus time-out occurs.
6-55 Analog Output Filter
Option: Function:
The following readout analog parameters from
selection in 6-50 Terminal 42 Output have a lter
selected when parameter 6-55 Analog Output Filter is
on:
Selection 0-20 mA 4-20 mA
Motor current (0–I
max
) [103] [133]
Torque limit (0–T
lim
) [104] [134]
Rated torque (0–T
nom
) [105] [135]
Power (0–P
nom
) [106] [136]
Speed (0–Speed
max
) [107] [137]
Table 3.14 Readout Analog Parameters
[0] * O Filter o
[1] On Filter on
Parameter Descriptions Programming Guide
MG11CE02 Danfoss A/S © 03/2015 All rights reserved. 87
3 3