Fuzzy Overshoot Suppression - Honeywell UDC2800 Product Manual

Chapter 5 - Monitoring and Operating the Controller
Completing Accutune
When Accutune is complete, the calculated tuning parameters are
stored in their proper memory location and can be viewed in the
Tunning Set up Group, and the controller will control at the local
setpoint using these newly calculated tuning constants.

Fuzzy Overshoot Suppression

Introduction
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.
How it works
The Fuzzy Logic in the controller 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 the Accutune algorithm. Fuzzy Tune should not be enabled
for processes that have an appreciable amount of deadtime.
Configuration
To configure this item, refer to Accutune Set Up Group:
Go to Function Prompt
Fuzzy Suppression
Select or using Increment key or Decrement key.
Enable Disable
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