Burkert Type 8693 - Manual (Page 235)

235
General Rules (Appendix)
57.2. i portion
Function:
(5) t d d X
i T
1
Y
∫ =
Ti is the integral action time or actuating time. It is the time which passes until the actuating variable has run
through the whole adjustment range.
Characteristic.and.step.response.of.the.I.portion.of.a.PID.controller
Characteristic Step response
X
Xd
Ymax
Ymin Adjustment range
∆Y
Xd
dY
dt
Figure 134: Characteristic and step response of the I portion of a PID controller
Properties
A pure I-controller completely eliminates the effects of any malfunctions which occur. It therefore has a favorable
static behavior. On account of its final actuating speed control it operates slower than the P-controller and has a
tendency to oscillate. It is therefore dynamically relatively unfavorable.
english
Type 8692,8693