Main Menu - Fc Closed Loop - Group - Trane TR150 Programming Manual

Parameters

3.14 Main Menu - FC Closed Loop - Group

20
This parameter group is used for configuring the closed-
loop PI controller, that controls the output frequency of
the frequency converter.
3 3
3.14.1 20-0* Feedback
This parameter group is used to configure the feedback
signal for the closed-loop PI control of the frequency
converter.
20-00 Feedback 1 Source
Option:
[0] No function
*
[1] Analog Input 53
[2] Analog Input 54
[3] Pulse input 29
[100] Bus Feedback 1
[101] Bus Feedback 2
20-01 Feedback 1 Conversion
Option:
[0] Linear
*
[1] Square
root
20-03 Feedback 2 Source
Option:
[0] No function
*
[1] Analog Input 53
[2] Analog Input 54
[3] Pulse input 29
[100] Bus Feedback 1
[101] Bus Feedback 2
20-04 Feedback 2 Conversion
Option:
[0] Linear
*
[1] Square root
3.14.2 20-2* Feedback/Setpoint
Parameter group for feedback function and setpoints.
Select which setpoint and feedback to use. The setpoint
and feedback can be a fixed pair or selected separately
based on logic comparisons.
84
TR150 and TR170
Function:
This parameter defines which input is
used as the source of the feedback
signal.
Function:
This parameter allows a conversion function to
be applied to feedback 1.
[0] Linear has no effect on the feedback.
[1] Square root is commonly used when a
pressure sensor is used to provide flow
feedback.
( ( flow ∝ pressure) ).
Function:
Function:
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20-20 Feedback Function
Select how the feedback should be calculated. The feedback can
be either a single feedback source or a combination of several
feedbacks.
Option:
[0] Sum
[1] Difference
[2] Average
[3] Minimum
*
[4] Maximum
3.14.3 20-8* PI Basic Settings
Parameters for configuring the process PI control.
20-81 PI Normal/ Inverse Control
Option: Function:
[0] Normal Causes the frequency converter output frequency
*
to decrease when the feedback is greater than the
setpoint reference. This behavior is common for
pressure-controlled supply fan and pump
applications.
[1] Inverse Causes the frequency converter output frequency
to increase when the feedback is greater than the
setpoint reference. This behavior is common for
temperature-controlled cooling applications, such
as cooling towers.
20-83 PI Start Speed [Hz]
Range: Function:
0 Hz [ 0 - Enter the motor speed to be attained as a
*
200.0 Hz] start signal for commencement of PI control.
After power-up, the frequency converter
operates using speed open-loop control.
When the process PI start speed is reached,
the frequency converter changes to PI control.
20-84 On Reference Bandwidth
Range: Function:
5 % [0 - When the difference between the feedback and
*
200 %] the setpoint reference is less than the value of
this parameter, the frequency converter display
shows Run on Reference. This status can be
communicated externally by programming the
function of a digital output for [8] Run on
Reference/No Warning. In addition, for serial
communications, the on-reference status bit of
the frequency converter status word is high (1).
The on-reference bandwidth is calculated as a
percentage of the setpoint reference.
Function:
BAS-SVP16B-EN