Example Of Convergence Of Control Streams For Lad, Stl, And Fbd - Siemens SIMATIC S7-200 System Manual

SIMATIC Instructions
The convergence of control streams can be implemented in an SCR program by
making the transition from state L to state L' and by making the transition from
state M to state M'. When both SCR bits representing L' and M' are true, state N
can the enabled as shown in Figure 9-62.
Network
Network
. . .
Network
V100.5
Network
Network
Network
. . .
Network
C50
Network
Network
S3.5
Figure 9-62
9-164
LAD
S3.4
SCR
S3.5
SCRT
SCRE
S6.4
SCR
S6.5
SCRT
SCRE
S6.5
S5.0
S
1
S3.5
R
1
S6.5
R
1

Example of Convergence of Control Streams for LAD, STL, and FBD

Network
Beginning of State L
LSCR
control region.
Network
. . .
Network
LD
Transition to State L'.
SCRT
End of SCR region for
Network
State L.
SCRE
Beginning of State M
Network
control region.
LSCR
Network
. . .
Network
LD
Transition to State M'.
SCRT
Network
End of SCR region for
SCRE
State M.
Network
LD
Enable State N.
A
S
R
Reset State L'.
R
Reset State M'.
S7-200 Programmable Controller System Manual
STL
S3.4
V100.5
S3.5
S6.4
C50
S6.5
S3.5
S6.5
S5.0, 1
S3.5, 1
S6.5, 1
A5E00066097-02