Honeywell UDC2500 ユーザーズマニュアル

When Accutune is complete, the calculated tuning parameters are stored in their proper 
memory location and can be viewed in the TUNING Set up Group, and the controller 
will control at the local setpoint using these newly calculated tuning constants. 

Fuzzy Overshoot Suppression minimizes Process Variable overshoot following a setpoint 
change or a process disturbance.  This is especially useful in processes which experience 
load changes or where even a small overshoot beyond the setpoint may result in damage 
or lost product. 

The fuzzy logic observes the speed and direction of the PV signal as it approaches the 
setpoint and temporarily modifies the internal controller response action as necessary to 
avoid an overshoot.  There is no change to the PID algorithm, and the fuzzy logic does 
not alter the PID tuning parameters.  This feature can be independently Enabled or 
Disabled as required by the application to work with “TUNE” (On-Demand) Accutune 
III tuning algorithm. 

To configure this item, refer to Section 3 - Configuration: 

Set Up Group “ATUNE” 
Function Prompt “FUZZY” 
Select “ENAB”(enable) or “DIS” (disable) - Use 

or

. 

 

You can use two sets of tuning constants for single output types and choose the way they 
are to be switched. (Does not apply for Duplex control.) 

The sets can be: 

•  keyboard selected, 
•  automatically switched when a predetermined process variable value is reached,  
•  automatically switched when a predetermined setpoint value is reached.