3050-8010
Einbau- und Betriebsanleitung
Installation and Operating instructions
Instructions de montage et de service
Regeltechnik Kornwestheim
GmbH
Max-Planck Straße 3
D-70806 Kornwestheim
T49 7154 / 13 14 - 0
T49 7154 / 13 14 - 31
Internet www.rtk.de
E-Mail [email protected]
- 39 -
7
Controller characteristics ( PID )
7.1 Three-point-step controller
If the set
Xp1
is to be valid for the control time of the particular actuator, the
motor running time
Tm
must be
set. The smallest adjustment interval is 80ms.
If optimization is to be based on control response, the information in Table 1 must be noted.
Setting the neutral zone
The neutral zone
Xs
h
can be enlarged, if the switch outputs alternate switching with too great a frequency.
However, it should be noted that a larger neutral zone causes weaker responses to adjustments.
For this reason it is advisable to find a reasonable balance between frequent switching (wearing out the actuator) and
responsiveness to adjustments.
Static functioning of the three-step controller
Three-step controllers can be operated with or without position feedback Yp.
Yp is not needed for controls. The illustration shows the static characteristics
of the three- step controller.
Table 1
Setting aids for optimizing control
Characteristic
Control procedure
Problem
Starting procedure
Xp larger
smaller
more attenuated
less attenuated
slower compensation
faster compensation
slower energy reduction
faster energy reduction
Tv larger
smaller
less attenuated
more attenuated
stronger reaction
weaker reaction
earlier energy reduction
later energy reduction
Tn larger
smaller
more attenuated
less attenuated
slower compensation
faster compensation
slower energy reduction
faster energy reduction
100%
0%
100%
0%
Y1
Â
Y2
Â
X 1 0 0
X 0
W 0
W e f f
W 1 0 0
X e f f
X p 1
Xsh
>3s
End
Hold
OStar
Para
TV1
End
Signl
Aux
Input
Contr
Tune
Limit
Setpt
I
D
I
D
I
D
I
D
I
D
+
+
+
+
+
270
Man.
xw____áûô___ 12%
10.5
End
CPara
Para
I
D
+
P
P
P
P
P
P
XP1
TN1
End
30.0
Xsh
TPuls
Tm
End