Siemens SIPART DR21 - Page 100

3 Functional description of the structure switches
3.6 Controller output structures (S2, S49 to S55)
Manual
100
SIPART DR21
C73000-B7476-C143-08
1
0
2, 3
S54
1
S55
2
S51
1
H
2
S51
1
H
+
Δy
H
-Δy
H
N
N
Si
Si
y
S
>50
+yBL -yBL
+
-
PID
+
-
tP, tM
tA, tE
internal position control circuit
+
ΔY
a
yn
ya
0/(3/4)*
S30S29
* as of software version –A5
0/(3/4)*
y
S
≤50
-
Δy
y
R
+Δy
S19
S57 S57
μ
E
y
GND
0
Y
An
00
A=H
∧N∧Si
H=Hi∨He
1
1
1 00 00
0
Figure 3-25 Block diagram
S-controller with internal feedback S2 =2
Tracking (DDC) has priority over manual operation S49 = 0