Siemens SIMATIC BATCH Operating Manual page 1139

SFC
Sequential Function Chart (SFC): A graphic representation of a sequential program consisting
of interconnected steps, actions and specific links with step enabling conditions.
SFC is a suitable method of representation (description of the processing sequence) of the
entire procedural rules with sequential and parallel steps providing clarity in the process
controls.
Simultaneous branch
Structure element of a recipe that implements an AND branch or an AND divergence. A
simultaneous branch consists of at least two horizontally arranged sequences joined at top
and bottom by double lines. A simultaneous branch results in the simultaneous execution of
more than one sequence. This allows processes to be executed at the same time.
Site recipe
A site-specific recipe type. Site recipes can be derived from general recipes taking into account
regional constraints such as language or available materials.
Step
A step is the smallest functional unit of an SFC chart. The smallest structural unit in a recipe
is known as a recipe step.
Structure element
Structure elements of a recipe consist of an arrangement of basic elements. The following are
examples: "simultaneous branch", "alternative branch" and "loop".
SUIR
Software update in run (software update during operation)
Synchronization line
The synchronization lines coordinate the execution of recipe sequences in the units or of the
recipe operations (ROPs) between the units.
Synchronization point
At each synchronization point, it is possible to decide whether the execution of the recipe
sequence should be held.
Transition
A transition contains conditions that must be satisfied so that the controller can move on from
one state to the next or pass control from one step to the next.
SIMATIC BATCH V8.2
Operating Manual, 02/2016, A5E35958174-AA
Glossary
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