Trane TR200 Series Programming Manual page 201

Parameter Description
21-00 Closed Loop Type
Option:
[0] * Auto
[1] Fast Pressure
[2] Slow Pressure
[3] Fast Temperature
[4] Slow Temperature
21-01 PID Performance
Option:
[0] * Normal
[1] Fast
21-02 PID Output Change
Range:
0.10 N/ [0.01 - 0.50 N/A]
A*
21-03 Minimum Feedback Level
Range:
-999999. [-999999.999 - par. 21-04 N/
000 N/ A]
A*
21-04 Maximum Feedback Level
Range:
999999. [par. 21-03 - 999999.999 N/
000 N/ A]
A*
200
Function:
This parameter defines the application response. The default mode
should be sufficient for most applications. If the relative application
speed is known, it can be selected here. This will decrease the time nee-
ded for carrying out PID Autotuning. The setting has no impact on the
value of the tuned parameters and is used only for the PID auto-tuning
sequence.
Function:
Normal setting of this parameter will be suitable for pressure control in
fan systems.
Fast setting would generally be used in pumping systems, where a faster
control response is desirable.
Function:
This parameter sets the magnitude of step change during autotuning.
The value is a percentage of full operating range. I.e. if maximum analog
output voltage is set to 10 V, 0.10 is 10% of 10 V, which is 1 V. This pa-
rameter should be set to a value resulting in feedback changes of be-
tween 10% and 20% for best tuning accuracy.
Function:
The minimum allowable feedback level should be entered here in User
Units as defined in par.21-10
21-30 Ext. 2 Ref./Feedback Unit
Feedback Unit for EXT CL 3. If the level falls below par.21-03
Feedback Level, PID autotuning is aborted and an error message will ap-
pear on the keypad.
Function:
The maximum allowable feedback level should be entered here in User
units as defined in par.21-10
21-30 Ext. 2 Ref./Feedback Unit
Feedback Unit for EXT CL 3 If the level rises above par.21-04
Feedback Level, PID autotuning is aborted and an error message will ap-
pear on the keypad.
Ext. 1 Ref./Feedback Unit for EXT CL 1, par.
for EXT CL 2 or par.21-50
Ext. 1 Ref./Feedback Unit for EXT CL 1, par.
for EXT CL 2 or par.21-50
TR200 Programming Guide
Ext. 3 Ref./
Minimum
Ext. 3 Ref./
Maximum