Convergence Of Control Streams - Siemens SIMATIC S7-200 System Manual

Convergence Control
A similar situation arises when two or more streams of sequential states must be
merged into a single stream. When multiple streams merge into a single stream,
they are said to converge. When streams converge, all incoming streams must be
complete before the next state is executed. Figure 9-61 depicts the convergence of
two control streams.
Figure 9-61
S7-200 Programmable Controller System Manual
A5E00066097-02
State L

Convergence of Control Streams

State M
Transition Condition
State N
SIMATIC Instructions
9-163