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198 UDC 6300 Process Controller Product Manual 1/03
5.19 Fuzzy Overshoot Suppression
Introduction
Fuzzy Overshoot Suppression minimizes overshoot after 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 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 tuning or
the “SP” tuning algorithm.
Configuration
To configure this item, refer to Section 3 - Configuration:
• Set Up Group “ACCUTUNE
• Function Prompt “FUZZY
• Select “ENABLE” or “DISABLE” ( or )
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