Trane TR200 - Page 203

20-70 Closed-loop Type
Option: 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.
[0] * Auto
[1] Fast Pressure
[2] Slow Pressure
[3] Fast Temperature
[4] Slow Temperature
20-71 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.
20-72 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 speed. This means that if the maximum
output frequency inpar.4-13
Motor Speed High Limit [RPM]/par.4-14 Mo-
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.
20-73 Minimum Feedback Level
Range: Function:
-999999.
000
Proc-
essCtrlU-
nit*
[Application dependant] The minimum allowable feedback level should be entered here in user
units as defined in par.20-12
Reference/Feedback Unit. If the level falls
below par.20-73
Minimum Feedback Level, autotuning is aborted and an
error message will appear on the keypad.
20-74 Maximum Feedback Level
Range: Function:
999999.
000
Proc-
essCtrlU-
nit*
[Application dependant] The maximum allowable feedback level should be entered here in user
units as defined in par.20-12
Reference/Feedback Unit. If the level rises
above par.20-74
Maximum Feedback Level, autotuning is aborted and an
error message will appear on the keypad.
Parameter Description
4-166 TR200 Programming Guide