Trane TR200 Series - Page 201

21-00 Closed Loop Type
Option: 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.
[0] * Auto
[1] Fast Pressure
[2] Slow Pressure
[3] Fast Temperature
[4] Slow Temperature
21-01 PID Performance
Option: Function:
[0] * Normal Normal setting of this parameter will be suitable for pressure control in
fan systems.
[1] Fast Fast setting would generally be used in pumping systems, where a faster
control response is desirable.
21-02 PID Output Change
Range: Function:
0.10 N/
A*
[0.01 - 0.50 N/A] 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.
21-03 Minimum Feedback Level
Range: Function:
-999999.
000 N/
A*
[-999999.999 - par. 21-04 N/
A]
The minimum allowable feedback level should be entered here in User
Units as defined in par.21-10
Ext. 1 Ref./Feedback Unit for EXT CL 1, par.
21-30
Ext. 2 Ref./Feedback Unit for EXT CL 2 or par.21-50 Ext. 3 Ref./
Feedback Unit for EXT CL 3. If the level falls below par.21-03 Minimum
Feedback Level, PID autotuning is aborted and an error message will ap-
pear on the keypad.
21-04 Maximum Feedback Level
Range: Function:
999999.
000 N/
A*
[par. 21-03 - 999999.999 N/
A]
The maximum allowable feedback level should be entered here in User
units as defined in par.21-10
Ext. 1 Ref./Feedback Unit for EXT CL 1, par.
21-30
Ext. 2 Ref./Feedback Unit for EXT CL 2 or par.21-50 Ext. 3 Ref./
Feedback Unit for EXT CL 3 If the level rises above par.21-04 Maximum
Feedback Level, PID autotuning is aborted and an error message will ap-
pear on the keypad.
Parameter Description
200 TR200 Programming Guide