Trane TR200 - Page 208

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. This means that if
maximum analog output voltage is set to 10 V, 0.10 is 10% of 10 V, which
is 1 V. This parameter should be set to a value resulting in feedback
changes of between 10% and 20% for best tuning accuracy.
21-03 Minimum Feedback Level
Range: Function:
-999999.
000 N/
A*
[Application dependant] 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*
[Application dependant] 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.
21-09 PID Autotuning
Option: Function:
This parameter enables selection of the extended PID controller to be
autotuned and starts the PID autotuning for that controller. Once the au-
totuning has successfully completed and the settings have been accep-
ted or rejected by the user, by pressing [OK] or [Cancel] buttons on the
keypad at the end of tuning, this parameter is reset to [0] Disabled.
[0] * Disabled
[1] Enabled Ext CL 1 PID
[2] Enabled Ext CL 2 PID
[3] Enabled Ext CL 3 PID
Parameter Description
TR200 Programming Guide 4-171