Siemens SIPART DR21

3 Functional description of the structure switches
3.6 Controller output structures (S2, S49 to S55)
Manual
104
SIPART DR21
C73000-B7476-C143-08
Si
0/1
2/3
YA
0,1
tP, tM
SES
<
YE
PID
1
2
S51
H
ya
yS
y
ES
y
ES
y
E
N/DDC
yH
ES
y
H
& &
S57
--y B L
+yBL
μ
E
--Δy
+Δy
y
S19
y
R
2,3,4,5S85
y
H
y
N
y
H
y
2,3
1
0
S54
0
1
S55
00
y
AN
external position control circuit
y
-- +
y
N
S18
0
S53
0/(3/4)*
1
(4/5)*
S85
y
N
1
0
S53
YA YE
S29 S30
S57
GND
tP, tM tA tE
* as of software version - A5
Figure 3-27 Block diagram S-controller with external feedback S2 =3
Tracking (DDC) has priority over manual operation S49 = 0