
B–61863E/15
3. CONFIGURATION AND OPERATION
OF STEP–SEQUENCE
PROGRAMS
STEP SEQUENCE FUNCTION
993
A selective sequence branches to two or more sequences. When the
transition evaluates true, the corresponding step is activated.
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[Contents]
D Transitions are placed after a divergence of selective sequence.
D The step connected to the transition for which the conditions are true
is first activated.
D When the conditions for any transition are true simultaneously, the
leftmost step is activated.
D A selective sequence can create up to 16 paths.
[Example]
[ ]
S1
P100
S2
P101
S3
When the conditions for P101 are
satisfied earlier than those of P102,
step S3 is activated.
It combines two or more divergent paths to the main sequence.
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The number of divergent paths must match that of the convergent
paths.
[Example]
S2
P102
S4
P103
S3
While step S3 is executed, the transition
P103 evaluates true, thus step S4 is
activated.
3.4
DIVERGENCE OF
SELECTIVE
SEQUENCE
3.5
CONVERGENCE OF
SELECTIVE
SEQUENCE