Danfoss VLT CDS302 Operating Instructions Manual page 70

Parameter Descriptions
6-16 Terminal 53 Filter Time Constant
Range:
0.001 s [0.001 -
*
10.000 s]
NOTE
This parameter cannot be adjusted while the motor is
running.
6 6
6.7.3 6-2* Analog Input 2
Parameters for configuring the scaling and limits for
analog input 2 (terminal 54).
NOTE
Analog input 53 is preset for usage with "open loop"
control on 0-10 V. Terminal 54 is preset for "Process Loop"
control using a pressure sensor AKS with a pressure range
of -1 : 12 bar.
6-20 Terminal 54 Low Voltage
Range:
1.00V [-10.0 - par.
*
6-11]
6-21 Terminal 54 High Voltage
Range:
5.00V [6-10 to 10 V] This analog input scaling value should
*
6-22 Terminal 54 Low Current
Range:
4.0mA [0.0 to par. 6-13
*
mA]
6-23 Terminal 54 High Current
Range:
20.0mA [6-12 to 20 mA] This reference signal should
*
6-24 Terminal 54 Low Ref./Feedb.
Range:
-1 (bar) [Value] Enter the analog input scaling value that
70
Operating Instructions VLT
Function:
Enter the time constant. This is a first-
order digital low pass filter time
constant for suppressing electrical noise
in terminal 53. A high time constant
value improves dampening but also
increases the time delay through the
filter.
Function:
This analog input scaling value
should correspond to the minimum
output value of the pressure sensor
Function:
correspond to the maximum output
value of the pressure sensor.
Function:
This reference signal should
correspond to the minimum output
value of the pressure sensor.
Function:
correspond to the maximum output
value of the pressure sensor.
Function:
corresponds to the minimum reference
feedback value set in 3-02 Minimum Reference.
®
MG34M302 - VLT is a registered Danfoss trademark/Commercial Compressor
®
CDS302 and CDS303
6-25 Terminal 54 High Ref./Feedb.
Range: Function:
12 (bar) [Value ] Enter the analog input scaling value that
corresponds to the maximum reference
feedback value set in 3-03 Maximum
Reference.
6-26 Terminal 54 Filter Time Constant
Range: Function:
0.001 s [0.001 - Enter the time constant. This is a first-
*
10.000 s] order digital low pass filter time
constant for suppressing electrical noise
in terminal 54. A high time constant
value improves dampening but also
increases the time delay through the
filter.
NOTE
This parameter cannot be adjusted while the motor is
running.
6-50 Terminal 42 Output
Option: Function:
Select the function of Terminal 42 as an
analog current output. Depending on the
selection the output is either a 0-20 mA or
4-20 mA output. The current value can be
read out in LCP in 16-65 Analog Output 42
[mA].
[0] No There is no signal on the analog output.
operation
[100] Output 0 Hz = 0 mA; 100 Hz = 20 mA.
frequency
0-20 mA
[101] Reference 3-00 Reference Range [Min - Max] 0% = 0 mA;
0-20 mA 100% = 20 mA
3-00 Reference Range [-Max - Max] -100% = 0
mA; 0% = 10 mA; +100% = 20 mA
[103] Motor Value is taken from 16-37 Inv. Max. Current.
current Inverter max. current (160% current) is equal
0-20 mA 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.
mA x 22 A
20
38.4 A
In case the norm motor current is equal to
20 mA, the output setting of 6-52 Terminal 42
Output Max Scale is:
I VLT x 100
Max
I Motor
Norm
[104] Torque rel The torque setting is related to setting in
to lim 0-20 4-16 Torque Limit Motor Mode
mA
mA
= 11.46
38.4 x 100
= = 175 %
22