Danfoss VLT AutomationDrive FC 300 Programming Manual page 93

Parameter Descriptions
6-51 Terminal 42 Output Min Scale
Range:
0.00 % [0.00 - 200.00
*
%]
3 3
6-52 Terminal 42 Output Max Scale
Range:
100.00 [0.00 -
% 200.00 %]
*
20 mA / desired maximum current x 100 %
20
i . e . 10 mA : x 100 = 200 %
10
6-53 Terminal 42 Output Bus Control
Range:
0.00 % [0.00 - 100.00 %] Holds the level of Output 42 if
*
6-54 Terminal 42 Output Timeout Preset
Range:
0.00 % [0.00 - 100.00
*
%]
92
Function:
Scale for the minimum output (0 or 4mA)
of the analogue signal at terminal 42.
Set the value to be the percentage of the
full range of the variable selected in
6-50 Terminal 42 Output.
Function:
Scale the maximum output of the selected
analog signal at terminal 42. Set the value to
the maximum value of the current signal
output. Scale the output to give a current
lower than 20mA at full scale; or 20mA at an
output below 100% of the maximum signal
value. If 20mA is the desired output current
at a value between 0 - 100% of the full-scale
output, programme the percentage value in
the parameter, i.e. 50% = 20mA. If a current
between 4 and 20mA is desired at maximum
output (100%), calculate the percentage
value as follows:
Current
(mA)
20
0/4
0%
Analogue Analogue 100% Variable
output Output for
Min Scale Max Scale output
par. 6-51 par. 6-52 example:
Speed
(RPM)
Function:
controlled by bus.
Function:
Holds the preset level of Output 42.
In case of a bus timeout and a timeout
function is selected in 6-50 Terminal 42
Output the output will preset to this
level.
MG.33.MB.02 - VLT
FC 300 Programming Guide
6-55 Analog Output Filter
Option:
[0] Off Filter off
*
[1] On Filter on
3.8.7 6-6* Analog Output 2 MCB 101
Analog outputs are current outputs: 0/4 - 20mA. Common
terminal (terminal X30/8) is the same terminal and electrical
potential for analog common connection. Resolution on
analog output is 12 bit.
6-60 Terminal X30/8 Output
Option:
[0] No
*
operation
[52] MCO
0-20mA
[100] Output
frequency
[101] Reference
[102] Feedback
[103] Motor
current
®
is a registered Danfoss trademark
Function:
The following readout analogue parameters from
selection in 6-50 Terminal 42 Output have a filter selected
when 6-55 Analog Output Filter is on:
Selection
Motor current (0 - I )
max
Torque limit (0 - T )
lim
Rated torque (0 - T )
nom
Power (0 - P )
nom
Speed (0 - Speedmax)
Function:
Select the function of Terminal X30/8 as an
analog current output. Depending on the
selection the output is either a 0-20mA or
4-20mA output. The current value can be read
out in LCP in 16-65 Analog Output 42 [mA].
When no signal on the analog output.
0hz = 0mA; 100hz = 20mA.
3-00 Reference Range [Min - Max] 0% = 0mA;
100% = 20mA
3-00 Reference Range [-Max - Max] -100% =
0mA; 0% = 10mA; +100% = 20mA
Value is taken from 16-37 Inv. Max. Current.
Inverter max. current (160% current) is equal to
20mA.
Example: Inverter norm current (11kW) = 24 A.
160% = 38.4 A. Motor norm current = 22 A
Read-out 11.46mA.
20 mA x 22 A
= 11.46 mA
38.4 A
In case the norm motor current is equal to
20mA, the output setting of 6-62 Terminal
X30/8 Max. Scale is:
I VLT x 100
Max 38.4 x 100
=
I Motor 22
Norm
0-20mA 4-20mA
[103] [133]
[104] [134]
[105] [135]
[106] [136]
[107] [137]
= 175 %