8 SFC PROGRAM
8.2 Structure
87
8
Transition types
The following table lists the types of transition.
For the operation of transition to the step which is already activated, refer to the following.
Page 110 Behavior when an active step is activated
Item Description
Series sequence When the transition becomes TRUE, the active state transitions from the
preceding step to the subsequent step.
Selective sequence
(divergence/convergence)
Divergence: A step branches to multiple transitions, and only the step in the line
where the transition becomes TRUE first is activated.
Convergence: The next step is activated when the transition immediately before
convergence, which is in the line where the transition becomes TRUE first,
becomes TRUE.
Simultaneous sequence
(divergence/convergence)
Divergence: All the steps branched from one step are activated simultaneously.
Convergence: When all the steps immediately before convergence are activated
and the common transition becomes TRUE, the active state transitions to
the next step.
Jump sequence When the transition becomes TRUE, the active state transitions to the specified
step in the same block.
To Next Page
Loading...
