Danfoss VLT CDS 303 Operating Instructions Manual page 77

Parameter Descriptions
6-50 Terminal 42 Output
Option: Function:
[108] Torque Torque reference related to 160% torque.
[109] Max Out 0 Hz = 0 mA,parameter 4-19 Max Output
Freq Frequency = 20 mA.
[130] Output freq. 0 Hz = 4 mA, 100 Hz = 20 mA
4-20mA
[131] Reference Parameter 3-00 Reference Range [Min-Max]
4-20mA 0% = 4 mA; 100% = 20 mA
Parameter 3-00 Reference Range [-Max-Max]
-100% = 4 mA; 0% = 12 mA; +100% = 20
mA
[132] Feedback
4-20mA
[133] Motor cur. Value is taken from parameter 16-37 Inv.
4-20mA Max. Current. Inverter max. current (160%
current) is equal to 20 mA.
Example: Inverter norm current (11 kW) =
24 A. 160% = 38.4 A. Motor norm current =
22 A Read-out 11.46 mA.
16 mA x 22 A
38 . 4 A
In case the norm motor current is equal to
20 mA, the output setting of
parameter 6-62 Terminal X30/8 Max. Scale is:
I x 100
VLT
Max =
I
Motor
Norm
[134] Torq.% lim The torque setting is related to setting in
4-20 mA parameter 4-16 Torque Limit Motor Mode.
[135] Torq.% nom The torque setting is related to the motor
4-20 mA torque setting.
[136] Power Taken from parameter 1-20 Motor Power [kW]
4-20mA
[137] Speed Taken from parameter 3-03 Maximum
4-20mA Reference. 20 mA = Value in
parameter 3-03 Maximum Reference.
[138] Torque Torque reference related to 160% torque.
4-20mA
[139] Bus ctrl. 0-20 An output value set from fieldbus process
mA data. The output will work independently of
internal functions in the frequency
converter.
[140] Bus ctrl. 4-20 An output value set from fieldbus process
mA data. The output will work independently of
internal functions in the frequency
converter.
[141] Bus ctrl Parameter 4-54 Warning Reference Low
0-20mA t.o. defines the behavior of the analog output in
case of bus time-out.
[142] Bus ctrl Parameter 4-54 Warning Reference Low
4-20mA t.o. defines the behavior of the analog output in
case of bus time-out.
[150] Max Out Fr 0 Hz = 0 mA,parameter 4-19 Max Output
4-20mA Frequency = 20 mA.
MG34M422
Operating Instructions
+ 4 mA = 13 . 17 mA
38 . 4 x 100
= 175 %
22
Danfoss A/S © Rev. 2013-07-03 All rights reserved.
6-51 Terminal 42 Output Min Scale
Range: Function:
0 % [0 - Scale for the minimum output (0 or 4 mA) of
*
200 %] the analog signal at terminal 42.
Set the value to be the percentage of the full
range of the variable selected in
parameter 6-50 Terminal 42 Output.
6-52 Terminal 42 Output Max Scale
Range: Function:
100 [0 - Scale the maximum output of the selected
% 200 %] 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 20
mA at full scale; or 20 mA at an output below
100% of the maximum signal value. If 20 mA 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% = 20
mA. If a current between 4 and 20 mA is desired
at maximum output (100%), calculate the
percentage value as follows:
20 mA/desired maximum current x 100 %
20
i . e . 10 mA : x 100 = 200 %
10
Current
(mA)
20
0/4
0% Analog
Analog
output Min Output Max
Scale
Scale
par. 6-51 par. 6-52
Figure 6.9 Output Max Scale
6-53 Terminal 42 Output Bus Control
Range: Function:
0 % [0 - 100 %] Holds the level of Output 42 if controlled by
*
bus.
Variable for
100%
output
example: Speed
(RPM)
75
6 6