Santerno Sinus Penta - INTEGRAL ACTION (I)

SINUS PENTA
PROGRAMMING GUIDE
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When Kp is increased, the error is reduced at constant rate, but the transient can also be adversely affected. Adverse
effects can be a longer transient with stronger oscillations due to the damping reduction, or even instability. This is
shown in the figure below:
Figure 28: Response to the step when Kp is too large
24.3.2. INTEGRAL ACTION (I)
Symbol
Tuning function
Main goal
Ti
As soon as an input variance occurs (Error), an
output variance occurs. The variation rate is
proportional to the error magnitude.
Sets the tuning point (eliminates the offset from
the proportional action).
PI Regulator
Response to the step
Response time
Small Kp
Overshoot
Shorter
Optimum Kp
Optimum
Optimum
Large Kp
Undershoot
Longer