Danfoss VLT HVAC Operating Instructions Manual page 76

6. How to programme the frequency converter
6-20
Value:
0.00 – par. 6-21
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
Value:
Par. 6-20 to 10.0 V
Function:
Enter the high voltage value. This analog input
6
scaling value should correspond to the high
reference/feedback value set in par. 6-25.
6-24
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.
6-25
Value:
Par. 6-24 to 1000000.000
Function:
Enter the analog input scaling value that cor-
responds to the high voltage/high current val-
ue set in par. 6-21/6-23.
6-26
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
76
Terminal 54 Low Voltage
0.07V
Terminal 54 High Voltage
10.0V
Terminal 54 Low Ref./Feedb.
Value
0.000 Unit
Terminal 54 high ref./feedb.
value
100.000 Unit
Terminal 54 Filter Time Con-
stant
0.001s
MG.11.A4.02 - 09.10.06. VLT
®
VLT HVAC Drive Operating Instructions
also increases the time delay through the fil-
ter.
This parameter cannot be adjusted while the
motor is running.
6-27 Terminal 54 Live Zero
Value:
Disabled
Enabled
Function:
This parameter makes it possible to disable
the Live Zero monitoring. E.g. to be used if the
analog outputs are used as part of a decentral
I/O system (e.g. when not part of any fre-
quency converter related control functions,
but feeding a Building Management System
with data)
6-50 Terminal 42 Output
Value:
No operation
Output frequency
Reference
Feedback
Motor current
Torque rel to lim
Torque rel to rated
Power
Speed
Torque
Ext. closed loop 1
Ext. closed loop 2
Ext. closed loop 3
Output freq. 4-20mA
Reference 4-20mA
Feedback 4-20mA
Motor cur. 4-20mA
Torque % lim. 4-20mA
Torque % nom 4-20mA
Power 4-20mA
Speed 4-20mA
Torque 4-20mA
Bus ctrl. 0-20 mA
Bus ctrl. 4-20 mA
Bus ctrl. 0-20 mA, timeout
Bus ctrl. 4-20 mA, timeout
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