Programming the Structure of the Sequencer
S7-GRAPH for S7-300/400 Programming Sequential Control Systems
C79000-G7076-C526-01
6-9
6.9 Branch Stop
A branch stop at the end of a linear sequencer (1) or at the end of a path of an
alternative branch (2) terminates the sequencer. The sequencer is not executed
cyclically.
A branch stop at the end of a path of a simultaneous branch (3) terminates only
this path. Execution of the other simultaneous branch paths is continued.
A branch stop always follows a transition.
T4T2
T1
T3
T2
T1
T3
T5
T6
T4
T2
T1
T3
T5
1 2 3
S1
S2
S3
S4
S5
T3
S1
S2
S3
S1
S2
S3
S1
S1
S4
S5
T3
6.10 New Sequencer
An S7-Graph FB consists of a maximum of 8 sequencers.
Each sequencer can
• be executed independent of the other sequencers and therefore at the same
time.
• be used with a jump to continue it or connect it as the branch of another
sequencer. This allows you to represent technically complicated functions in
one block providing you with a clearer structure for the program.
In every sequencer, an initial step can identify the first active step.
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