Emerson Tescom ER5000 Series User Manual page 158

ER5000 — The ERTune™ Program: Basic Features
11. If you note a delayed response to a change in setpoint or that
the changes to Integral Limits have re-introduced overshoot
that slowly settles into setpoint, these are signs of Integral
windup. You will need to decrease the Integral Limits to
correct this.
Figure 60: Typical Tuning: Integral Windup
Overshoot with a pronounced settling time in a previously stable response is a sign that
the Integral Limit levels are too high, allowing Integral windup to affect the response.
NOTE NOTE
If you find that you cannot eliminate offset and windup without
increasing instability, you will need to reduce the Integral Term.
CAUTION CAUTION
WARNING WARNING
To add Integral Deadband
1. Allow the ER5000 to cycle through the Plot Screen several
times at the current setpoint.
2. If the ER5000 activates repeatedly while the setpoint
remains at the same level, move the Deadband slider to the
right or enter a number in the field next to the slider.
3. Increase the value slowly, in one percent increments, until
the unwanted activation stops.
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