Sfc Program Operation - Omron SFC - INTRODUCTION GUIDE Introduction Manual

1-3-2 SFC Program Operation

A step can be either active or inactive.
When a step becomes active, actions defined within that step are executed.
When the transition condition is satisfied, the step immediately before the transition becomes
inactive, and the step immediately after the transition becomes active.
The following example illustrates a case in which transition condition "Trans1" is satisfied, and the
active status is transferred from step 1 to step 2.
The bullet symbol indicates the active step.
: Divergence/Convergence
A divergence is a structure in which a single
step is followed by multiple transitions. The
active status is transferred to the transition for
which the condition is satisfied.
A convergence is a structure in which multiple
transitions are each followed by a step. This
structure merges a flow that has been
branched.
For details on SFC elements, refer to CX-
Programmer Operation Manual SFC .
1-3 SFC Operation
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