Burkert 8205 Notice D'utilisation page 93

APPENDIX
dY
dt
Control range
Characteristic
Characteristics :
A pure I controller eliminates the effects of occuring disturbances completely. Therefore, it has
a favorable static response. Owing to its finite manipulating speed, it operates more slowly than
the P controller and tends to oscillate. Therefore, it is relatively unfavorable from the dynamic point
of view.
D component :
Function : Y= Kd
Kd ist the derivative action coefficient.
The higher Kd is, the stronger the D influence is.
X
Xd
Y
Step response
Characteristics :
A controller with a D component reacts to changes in the controlled variable and is accordingly
capable of dissipating occurring deviations faster.
Xd
Ymin
Xd
t
t
E-43-
PH CONTROLLER 8205
X
Xd
Y
Ymax
Ti
Manipulating
time
Step response
t
range ∆Y
t