Siemens SIMATIC S7-200 - Example of Divergence of Control Streams for LAD, STL, and FBD

SIMATIC Instructions
9-162
S7-200 Programmable Controller System Manual
A5E00066097-02
The divergence of control streams can be implemented in an SCR program by
using multiple SCRT instructions enabled by the same transition condition, as
shown in Figure 9-60.
SCRT
SCR
S3.5
S3.4
SCRE
LAD STL
Network
LSCR S3.4
Network
Network
Network
Beginning of State L
control region
Transition to State M
End of SCR region for
State L
M2.3
Network
Network
LD M2.3
A I2.1
SCRT S3.5
SCRT S6.5
Network
SCRE
Network
. . .
. . .
I2.1
SCRT
S6.5
Transition to State N
FBD
Network
S3.4
SCR
AND
M2.3
I2.1
Network
SCRT
S3.5
SCRT
S6.5
Network
SCRE
Figure 9-60 Example of Divergence of Control Streams for LAD, STL, and FBD