Trane TR200 Series Programming Manual page 184

20-00 Feedback 1 Source
Option:
[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
NOTE: If a feedback is not used, its source must be set to
how the three possible feedbacks will be used by the PID Controller.
20-01 Feedback 1 Conversion
Option:
[0] * Linear
[1] Square root
[2] Pressure to temperature
20-02 Feedback 1 Source Unit
Option:
[0] *
[1] %
[5] PPM
TR200 Programming Guide
Function:
Up to three different feedback signals can be used to provide the feed-
back signal for the frequency converter's PID Controller.
This parameter defines which input will be used as the source of the first
feedback signal.
Analog input X30/11 and Analog input X30/12 refer to inputs on the op-
tional General Purpose I/O board.
No Function
Function:
This parameter allows a conversion function to be applied to Feedback
1.
Linear
[0] has no effect on the feedback.
Square root
[1] is commonly used when a pressure sensor is used to pro-
flow
vide flow feedback ( (
Pressure to temperature
[2] is used in compressor applications to provide
temperature feedback using a pressure sensor. The temperature of the
refrigerant is calculated using the following formula:
A
Temperature
=
( ln ( Pe + 1 ) −
frigerant-specific constants. The refrigerant must be selected in par.
20-30 Refrigerant. par.20-21
low the values of A1, A2 and A3 to be entered for a refrigerant that is not
listed in par.20-30 Refrigerant.
Function:
This parameter determines the unit that is used for this Feedback Source,
prior to applying the feedback conversion of par.20-01
version. This unit is not used by the PID Controller.
Parameter Description
[0]. par.20-20 Feedback Function
pressure
∝ ) ).
2
A
− 3 , where A1, A2 and A3 are re-
A 1 )
Setpoint 1 through par.20-23
determines
Setpoint 3 al-
Feedback 1 Con-
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