Danfoss FC 100 Series Operating Instructions Manual page 82

How to Programme the Frequ...
6-52 Terminal 42 Output Max Scale
Range:
100.00 [0.00 -
% 200.00
*
%]
7 7
mA desired maximum current
20 /
20
i e mA
. . 10 :
10
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%
EXAMPLE 2:
Variable= FEEDBACK, range= -200% to +200%
Range needed for output= 0-100%
Output signal 0 or 4 mA is needed at 0% (50% of range) - set
par. 6-51 Terminal 42 Output Min Scale to 50%
Output signal 20 mA is needed at 100% (75% of range) - set
par. 6-52 Terminal 42 Output Max Scale to 75%
82
VLT
Function:
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:
× 100 %
mA
× 100 % = 200 %
mA
MG.11.AD.02 - VLT
®
HVAC Drive Operating Instructions
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 4 mA is needed at Min ref - set
par. 6-51 Terminal 42 Output Min Scale to 0%
Output signal 10 mA is needed at Max ref (100% of range) - set
par. 6-52 Terminal 42 Output Max Scale to 200%
(20 mA / 10 mA x 100%=200%).
14-01 Switching Frequency
Option:
[0] 1.0 kHz
®
is a registered Danfoss trademark
Function:
Select the inverter switching frequency. Changing
the switching frequency can help to reduce
acoustic noise from the motor.
NOTE
The output frequency value of the
frequency converter must never exceed
1/10 of the switching frequency. When
the motor is running, adjust the switch-
ing frequency in par. 14-01 Switching
Frequency until the motor is as noiseless
as possible. See also par. 14-00 Switching
Pattern and the section Derating.