Manual
1 Technical Description
1.5 Functional description of the structure switches
1.5.4 Controller types (S1, S49 to S53)
52
SIPART DR22 6DR2210
C79000-G7476-C154-03
xd
I
S101
2/3/4/5
0/1
1
0
0
c4, c5
wi1
wi2
c1, c2, c3
x
I
x
w
I
W
FE1
FE2
FE3
factory setting
c1=c2=c3=0
x=x1+c1 · (x2 - c2 · x3+c3)
x2
x1
x3
tF
I
tS
S5
2
w - c5
c4
SA,SE
wi1
n
o
1
S50
wi1 · c4+c5
Adaptation
Int
∧
CB
SES
wi1
ES
Int
∧
CB
Int
∧
CB
A
A
x1
factory setting
c4=1, c5=0
x
I
A=H
∨
N
∨
Si
d
*
I
d
*
I
d
*
I
x
II
0000
I
0000
w
H = Hi
∨
He
d
*
I
II
0000
I
0000
+
--
see
Fig. 1-5,
page 24
see
Fig.
1-50,
pg. 90
Figure 1-27
Block diagram S1 = 1, fixed setpoint controller with 2 dependent setpoints
1.5.4.4 S1 = 2:
DDC fixed setpoint controller
The DDC controller has the job of taking over the control circuit as bumpless as possible in the
case of a computer failure. During the DDC operation the process computer takes over the
control function, the controller is on standby, i.e. it is followed up to the computer manipulated
variable; the control difference is reset to zero for absolutely bumpless switching by x-tracking if
necessary.
In K-controller circuits, the actuating current can be output parallel by the computer periphery to
achieve full redundancy. In this case the actuating current of the K-controller is switched off
during computer operation (S66 = 1). If the actuating current of the computer is also to be
switched off during controller operation, the two currents simply need to be added by OR
diodes. This OR diode is integrated in the current outputs of the SIPART controllers.
If the UI-converter of the K-controller is to be used during computer operation to feed the final
control element, the actuating current cutoff must be canceled (S66 = 0).
The DDC mode corresponds to follow-up mode of the other controller types with the difference
that the switching to follow-up mode takes place not via the control signal N but as a function of
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Страница 236: ...Manual 6 Ordering data 234 SIPART DR22 6DR2210 C79000 G7476 C154 03 ...
Страница 242: ...Manual 7 Application examples for configuring the controller 240 SIPART DR22 6DR2210 C79000 G7476 C154 03 ...
Страница 260: ...Manual 9 Explanation of abbreviations 258 SIPART DR22 6DR2210 C79000 G7476 C154 03 ...
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