Danfoss VLT HVAC Drive FC 102 Operating Instructions Manual page 94

How to Programme
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%.
20 mA
0/4 mA
6 6
0%
-200%
Illustration 6.15 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
0%
Min ref
Illustration 6.16 Example 3
92
Operating Instructions
50% 75% 100%
0% +100% +200%
100% 200%
Max ref Max ref X 20/10
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14-01 Switching Frequency
Option: Function:
Select the inverter switching frequency. Changing
the switching frequency can help reduce acoustic
noise from the motor.
NOTICE
The output frequency value of the
frequency converter must never exceed
1/10 of the switching frequency. When the
motor is running, adjust the switching
frequency in parameter 14-01 Switching
Frequency until the motor is as noiseless as
possible. See also 14-00 Switching Pattern
and the section Derating in the relevant
design guide.
[0] 1.0 kHz
[1] 1.5 kHz
[2] 2.0 kHz
[3] 2.5 kHz
[4] 3.0 kHz
[5] 3.5 kHz
[6] 4.0 kHz
[7] 5.0 kHz
[8] 6.0 kHz
[9] 7.0 kHz
[10] 8.0 kHz
[11] 10.0 kHz
[12] 12.0kHz
[13] 14.0 kHz
[14] 16.0kHz
20-00 Feedback 1 Source
Option: Function:
Up to 3 different feedback signals
can be used to provide the feedback
signal for the frequency converter's
PID controller.
This parameter defines which input
is used as the source of the first
feedback signal.
Analog input X30/11 and analog
input X30/12 refer to inputs on the
optional general purpose I/O board.
[0] No function
[1] Analog Input 53
[2] Analog Input 54
*
[3] Pulse input 29
[4] Pulse input 33
[7] Analog Input X30/11
[8] Analog Input X30/12
[9] Analog Input X42/1
[10] Analog Input X42/3
[11] Analog Input X42/5
MG11F502