20-07 Feedback 3 Conversion
Option: Function:
See par. 20-01
Feedback 1 Conversion
for details.
[0] * Linear
[1] Square root
[2] Pressure to temperature
[3] Pressure to flow
[4] Velocity to flow
20-08 Feedback 3 Source Unit
Option: Function:
See par. 20-02
Feedback 1 Source Unit
for details.
20-12 Reference/Feedback Unit
Option: Function:
See par. 20-02
Feedback 1 Source Unit
for details.
20-13 Minimum Reference/Feedb.
Range: Function:
0.000 Proc-
essCtrlU-
nit*
[Application dependant] Enter the desired minimum value for the remote reference when operating with par. 1-00
Config-
uration Mode
set for Closed Loop [3] operation. Units are set in par. 20-12
Reference/Feedback
Unit
.
Minimum feedback will be -200% of either the value set in par. 20-13
Minimum Reference/Feedb.
or in par. 20-14
Maximum Reference/Feedb.
, which ever numeric value is the highest.
NB!
If operating with par. 1-00
Configuration Mode
set for Open Loop [0], par. 3-02
Minimum Reference
must be used.
20-14 Maximum Reference/Feedb.
Range: Function:
100.000
ProcessCtr-
lUnit*
[Application dependant] Enter the maximum reference/feedback for closed loop operation. The setting determines the high-
est value obtainable by summing all reference sources for closed loop operation. The setting
determines 100% feedback in open and closed loop (total feedback range: -200% to +200%).
NB!
If operating with par. 1-00
Configuration Mode
set for Open Loop [0], par. 3-03
Maximum Reference
must be used.
NB!
The dynamics of the PID controller will depend on the value set in this parameter. Please see also par. 20-93
PID Proportional Gain
.
Par. 20-13CL-13 and par. 20-14CL-14 also determine the feedback range when using feedback for display readout with
par. 1-00
Configuration Mode
set for Open Loop [0]. Same condition as above.
3.18.3 20-2* Feedback & Setpoint
This parameter group is used to determine how the frequency converter’s PID Controller will use the three possible feedback signals to control the output
frequency of the frequency converter. This group is also used to store the three internal setpoint references.
20-20 Feedback Function
Option: Function:
This parameter determines how the three possible feedbacks will be used to control the output
frequency of the frequency converter.
VLT
®
HVAC Drive Programming Guide 3 Parameter Description
MG.11.C9.02 - VLT
®
is a registered Danfoss trademark
179
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