172
Type 8692, 8693
english
General Rules - Appendix
2.3 D Portion
Function:
(6)
t d
d X d
dK Y ⋅=
Kd is the derivative action coeffficient. 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
Fig. 3: 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 differences more
quickly.
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