Trane TR200 - 20-01 Feedback 1 Conversion; 20-02 Feedback 1 Source Unit

[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
[12] Analog Input X49/1
[13] Analog Input X49/3
[14] Analog Input X49/5
[100] Bus feedback 1
[101] Bus feedback 2
[102] Bus feedback 3
NOTE: If a feedback is not used, its source must be set to
No Function [0]. Par. 20-20 Feedback Function deter-
mines how the three possible feedbacks will be used by the PID Controller.
20-01 Feedback 1 Conversion
Option: Function:
This parameter allows a conversion function to be applied to Feedback
1.
[0] * Linear
Linear [0] has no effect on the feedback.
[1] Square root
Square root [1] is commonly used when a pressure sensor is used to
provide flow feedback
(
( flow ∝ pressure )
).
[2] Pressure to temperature
Pressure to temperature [2] is used in compressor applications to pro-
vide temperature feedback using a pressure sensor. The temperature of
the refrigerant is calculated using the following formula:
Temperature =
A 2
(
ln
(
Pe +1
)
− A 1
)
−
A 3
,
where A1, A2 and A3 are refrigerant-specific constants. The refrigerant
must be selected in par. 20-30
Refrigerant. Par. 20-21 Setpoint 1 through
par. 20-23
Setpoint 3 allow the values of A1, A2 and A3 to be entered for
a refrigerant that is not listed in par. 20-30
Refrigerant.
20-02 Feedback 1 Source Unit
Option: Function:
This parameter determines the unit that is used for this Feedback Source,
prior to applying the feedback conversion of par. 20-01
Feedback 1 Con-
version. This unit is not used by the PID Controller.
[0] *
[1] %
[5] PPM
[10] 1/min
[11] RPM
[12] Pulse/s
[20] l/s
[21] l/min
How to program the Frequency Converter
6-44 BAS-SVX19C-EN