Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 111

Transition types
The following table lists the types of transition.
Item
Series sequence
Selective sequence
(divergence/convergence)
Simultaneous sequence
(divergence/convergence)
Jump sequence
For the operation of transition to the step which is already activated, refer to the following.
Page 145 Behavior when an active step is activated
Description
When the transition becomes TRUE, the active state transitions from the
preceding step to the subsequent step.
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.
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.
When the transition becomes TRUE, the active state transitions to the specified
step in the same block.
8 SFC PROGRAM
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8.2 Structure
8