Danfoss vlt series Operating Instructions Manual page 27

5 Parameter Set-up
[137] Speed 4-20 mA
[138] Torque 4-20 mA
[139] Bus ctrl. 0-20 mA
[140] Bus ctrl. 4-20 mA
[141] Bus ctrl. 0-20 mA, timeout
[142] Bus ctrl. 4-20 mA, timeout
[150] Max Out Freq 4-20 mA
6-71 Terminal X45/1 Output Min Scale
5
Range:
0.00%* [0.00 - 200.00%]
6-72 Terminal X45/1 Output Max Scale
Range:
100%* [0.00 - 200.00%]
6-73 Terminal X45/1 Output Bus Control
Range:
0.00%* [0.00 - 100.00%]
6-74 Terminal X45/1 Output Timeout Preset
Range:
0.00%* [0.00 - 100.00%]
26
Taken from par. 3-03 Maximum Reference . 20 mA = Value in par. 3-03 Maximum Reference .
Torque reference related to 160% torque.
An output value set from fieldbus process data. The output will work independently of internal
functions in the frequency converter.
An output value set from fieldbus process data. The output will work independently of internal
functions in the frequency converter.
Par. 4-54 Warning Reference Low defines the behaviour of the analog output in case of bus time-
out.
Warning Reference Low defines the behaviour of the analog output in case of bus time-
Par. 4-54
out.
Max Output Frequency .
In relation to par. 4-19
Function:
Scale the minimum output of the selected analog signal at terminal X45/1, as a percentage of the
maximum signal value. E.g. if 0 mA (or 0 Hz) is desired at 25% of the maximum output value, then
programme 25%. Scaling values up to 100% can never be higher than the corresponding setting
in par. 6-72 Terminal X45/1 Max. Scale .
Function:
Scale the maximum output of the selected analog signal at terminal X45/1. 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 (example where desired max. output is
10 mA):
I RANGE mA
x 100 % =
I DESIRED MAX mA
Current
[mA]
20
0/4
Analogue Analogue
0%
output Min Output Max
Scale Scale
par. 6-71 par. 6-72
Function:
Holds the level of Analog Output 3 (terminal X45/1) if controlled by bus.
Function:
Holds the preset level of Analog Output 3 (terminal X45/1).
In case of a bus timeout and a timeout function is selected in par. 6-70
output will preset to this level.
MI.33.G3.02 - VLT® is a registered Danfoss trademark
FC 300 Extended Relay Card Operating In-
mA
20 − 4
x 100 % = 160 %
mA
10
Variable for
100%
output
example:Speed
[RPM]
structions
Terminal X45/1 Output the