Danfoss VLT Refrigeration Drive FC 103 Programming Manual page 131

Parameter Description
20-03 Feedback 2 Source
Option: Function:
[4] Pulse input 33
[7] Analog Input X30/11
[8] Analog Input X30/12
[9] Analog Input X42/1
[10] Analog Input X42/3
[11] Analog Input X42/5
[100] Bus Feedback 1
[101] Bus Feedback 2
[102] Bus feedback 3
[110] Air Pres. to Flow
20-04 Feedback 2 Conversion
Option: Function:
See parameter 20-01 Feedback 1
Conversion for details.
[0] Linear
*
[1] Square root
[2] Pressure to
temperature
20-05 Feedback 2 Source Unit
Option: Function:
See parameter 20-02 Feedback 1 Source Unit for details.
20-06 Feedback 3 Source
Option: Function:
See parameter 20-00 Feedback 1
Source for details.
[0] No function
*
[1] Analog Input 53
[2] Analog Input 54
[3] Pulse input 29
[4] Pulse input 33
[7] Analog Input X30/11
[8] Analog Input X30/12
[9] Analog Input X42/1
[10] Analog Input X42/3
[11] Analog Input X42/5
[100] Bus Feedback 1
[101] Bus Feedback 2
[102] Bus feedback 3
[110] Air Pres. to Flow
20-07 Feedback 3 Conversion
Option: Function:
See parameter 20-01 Feedback 1
Conversion for details.
[0] Linear
*
[1] Square root
[2] Pressure to
temperature
MG16H202
Programming Guide
20-08 Feedback 3 Source Unit
Option: Function:
20-12 Reference/Feedback Unit
Option:
[60] °C
*
[160] °F
3.16.2 20-2* Feedback/Setpoint
This parameter group is used to determine how the PID
controller uses the 3 possible feedback signals to control
the output frequency of the frequency converter. This
group is also used to store the 3 internal setpoint
references.
20-20 Feedback Function
Option:
[0] Sum
[1] Difference Sets up the PID controller to use the difference
[2] Average
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See parameter 20-02 Feedback 1 Source Unit for details.
Function:
See parameter 20-02 Feedback 1 Source Unit for details.
Function:
This parameter determines how the 3 possible
feedbacks are used to control the output
frequency of the frequency converter.
Sets up the PID controller to use the sum of
feedback 1, feedback 2, and feedback 3 as the
feedback.
NOTICE
Set any unused feedbacks to [0] No
Function in
•
Parameter 20-00 Feedback 1
Source.
•
Parameter 20-03 Feedback 2
Source.
•
Parameter 20-06 Feedback 3
Source.
The sum of setpoint 1 and any other references
that are enabled (see parameter group 3-1*
References) are used as the PID controller's
setpoint reference.
between feedback 1 and feedback 2 as the
feedback. Feedback 3 is not used with this
selection. Only setpoint 1 is used. The sum of
setpoint 1 and any other references that are
enabled (see parameter group 3-1* References) are
used as the PID controller's setpoint reference.
Sets up the PID controller to use the average of
feedback 1, feedback 2, and feedback 3 as the
feedback.
3 3
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