5-20
Batch
flexible
, Manual
C79000-G7076-C650-02
During recipe execution, batch control interrogates objects as to their
topological information in order to decide what should happen next. At this
time it receives information about the concurrents and successors of each
object. With the aid of this information, batch control can determine whether
it is possible to continue with execution of the following object or to wait
until the concurrents finish.
Concurrents are those steps at the ends of the branches of a parallel branch
or those transitions at the start of an alternative branch. In the following
diagram steps S1, S2 and S3 are in each case concurrents. The same applies
to transitions T1, T2 and T3.
Successors are all sequentially accessible objects. In the following diagram
(Figure 5-7) all of the steps S1, S2 and S3 have all of the transitions as
successors.
S1 S2 S3
T1 T2 T3
Figure
5-7
Example of a complex concurrents and successors arrangement
Concurrents and
successors
Batch control
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