Trane TR200 Programming Manual page 203

Parameter Description
20-70 Closed-loop Type
Option:
[0] * Auto
[1] Fast Pressure
[2] Slow Pressure
[3] Fast Temperature
[4] Slow Temperature
20-71 PID Performance
Option:
[0] * Normal
[1] Fast
20-72 PID Output Change
Range:
0.10 N/ [0.01 - 0.50 N/A]
A*
20-73 Minimum Feedback Level
Range:
-999999. [Application dependant]
000
Proc-
essCtrlU-
nit*
20-74 Maximum Feedback Level
Range:
999999. [Application dependant]
000
Proc-
essCtrlU-
nit*
4-166
Function:
This parameter defines the application response. The default mode
should be sufficient for most applications. If the application response
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 autotuning se-
quence.
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 speed. This means that if the maximum
output frequency inpar.4-13
tor Speed High Limit [Hz] is set to 50 Hz, 0.10 is 10% of 50 Hz, which is 5
Hz. This parameter should be set to a value resulting in feedback changes
of between 10% and 20% for best tuning accuracy.
Function:
The minimum allowable feedback level should be entered here in user
units as defined in par.20-12
below par.20-73 Minimum Feedback
error message will appear on the keypad.
Function:
The maximum allowable feedback level should be entered here in user
units as defined in par.20-12
above par.20-74 Maximum Feedback
error message will appear on the keypad.
Motor Speed High Limit [RPM]/par.4-14
Reference/Feedback Unit. If the level falls
Level, autotuning is aborted and an
Reference/Feedback Unit. If the level rises
Level, autotuning is aborted and an
TR200 Programming Guide
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