Burkert Type 8693 - Manual (Page 236)

236
General Rules (Appendix)
57.3. d portion
Function:
(6)
t d
d X d
d K Y ⋅ =
Kd is the derivative action coefficient. The larger Kd is, the greater the D-effect is.
Characteristic.and.step.response.of.the.I.portion.of.a.PID.controller
Step response Ramp response
X
Xd
Y Y
X
t
t
Figure 135: Characteristic and step response of the D portion of a PID controller
Properties
A controller with a D portion responds to changes in the control variable and may therefore reduce any control dif-
ferences more quickly.
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Type 8692,8693