Feedback 1 Conversion; Feedback 2 Source; Feedback 2 Conversion; Feedback 3 Source - Danfoss vlt FC 102 Operating Instructions Manual

6. How to programme the frequency converter
[0]
[1]
*
[2]
[3]
[4]
[7]
[8]
[9]
[10]
[100]
[101]
[102]
NB!
6
If a feedback is not used, its source must be set to
will be used by the PID Controller.

20-01 Feedback 1 Conversion

This parameter allows a conversion function to be applied to Feedback 1.
* Linear
[0]
[1] Square root
[2] Pressure to tempera-
ture

20-03 Feedback 2 Source

Option:

20-04 Feedback 2 Conversion

Option:

20-06 Feedback 3 Source

Option:
20-07 Feedback 3 Conversion
Option:
94
No Function
Analog Input 53
Analog Input 54
Pulse Input 29
Pulse Input 33
Analog Input X30/11
Analog Input X30/12
Analog Input X42/1
Analog Input X42/3
Bus Feedback 1
Bus Feedback 2
Bus Feedback 3
Linear
[0] has no effect on the feedback.
Square root [1] is commonly used when a pressure sensor is used to provide flow feedback
(
flow pressure
∝
(
Pressure to temperature
sensor. The temperature of the refrigerant is calculated using the following formula:
Temperature
refrigerant must be selected in parameter 20-30. Parameters 20-21 through 20-23 allow the values of A1, A2
and A3 to be entered for a refrigerant that is not listed in parameter 20-30.
Function:
Feedback 1 Source
See
Function:
Feedback 1 Conversion
See
Function:
See Feedback 1 Source
Function:
Feedback 1 Conversion
See
MG.11.A6.02 - VLT
No Function [0]. Parameter 20-10 determines how the three possible feedbacks
)
).
[2] is used in compressor applications to provide temperature feedback using a pressure
A
2
= − A 3
, where A1, A2 and A3 are refrigerant-specific constants. The
( ( + 1 ) − 1 )
ln Pe A
, par. 20-00 for details.
par. 20-01 for details.
, par. 20-00 for details.
, par. 20-01 for details.
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VLT HVAC Drive Operating Instructions