Danfoss VLT HVAC Drive Instruction Manual page 87

VLT ® HVAC Drive Instruction Manual
6-15
Value:
Par. 6-14 to
1000000.000
Function:
Enter the analog input scaling value that cor-
responds to the high voltage/high current val-
ue set in par. 6-11/6-13.
6-16
Value:
0.001 - 10.000 s
Function:
Enter the time constant. This is a first-order
digital low pass filter time constant for sup-
pressing electrical noise in terminal 53. A high
time constant value improves dampening but
also increases the time delay through the fil-
ter.
This parameter cannot be adjusted while the
motor is running.
6-17
Value:
Disabled
Enabled
Function:
This parameter makes it possible to disable
Live Zero monitoring. For example, it is to be
used if the analog outputs are used as part of
a decentral I/O system (such as when they are
not part of any adjustable frequency drive-re-
lated control functions, but feeding a building
management system with data).
6-20
Value:
0.00 – par. 6-21
Terminal 53 High Ref./Feedb.
Value
100.000 Unit
Terminal 53 Filter Time Con-
stant
0.001s
Terminal 53 Live Zero
Terminal 54 Low Voltage
0.07V
MG.11.A4.22 - VLT ® is a registered Danfoss trademark
6. How to program the adjustable frequency
Function:
Enter the low voltage value. This analog input
scaling value should correspond to the low
reference/feedback value set in par. 6-24.
6-21 Terminal 54 High Voltage
Value:
Par. 6-20 to 10.0 V
Function:
Enter the high voltage value. This analog input
scaling value should correspond to the high
reference/feedback value set in par. 6-25.
Terminal 54 Low Ref./Feedb.
6-24
Value
Value:
-1000000.000 to par. 6-25
Function:
Enter the analog input scaling value that cor-
responds to the low voltage/low current value
set in par. 6-20/6-22.
Terminal 54 high ref./feedb.
6-25
value
Value:
[0]
Par. 6-24 to 1000000.000
[1]
Function:
Enter the analog input scaling value that cor-
responds to the high voltage/high current val-
ue set in par. 6-21/6-23.
Terminal 54 Filter Time Con-
6-26
stant
Value:
0.001 - 10.000 s
Function:
Enter the time constant. This is a first-order
digital low pass filter time constant for sup-
pressing electrical noise in terminal 54. A high
time constant value improves dampening but
drive
10.0V
6
0.000 Unit
100.000 Unit
0.001s
87