Mitsubishi Electric MELSEC iQ-F Series Programming Manual page 92

• The simultaneous sequence allows transitions to up to 32 steps.
• If another block is started by the simultaneous sequence, the START source block and START destination block will be
executed simultaneously.
• A simultaneous convergence is always performed after a simultaneous branch.
■Precautions
• When the steps merged by parallel convergence include HOLD steps that hold operations, the steps are handled as
inactive steps, and the transition to the next step does not occur.
• In the simultaneous convergence, a block start step (with END check) [BC] cannot be created immediately before the
convergence. Use a block start step (without END check) [BS].
Jump sequence
When the transition becomes TRUE, the active state transitions to the specified step in the same block.
(1)
(2)
• There are no restrictions regarding the number of jump sequences.
• A jump sequence in the simultaneous sequence is possible only in the same branch. A jump sequence to another branch
within a simultaneous branch, a jump sequence for exiting from a simultaneous branch, or a jump sequence to a
simultaneous branch from outside a simultaneous branch cannot be created.
Ex.
Example of jump sequence that can be specified in the simultaneous branch
8 SFC PROGRAM
90
8.2 Structure
(3)
When the transition (2) becomes TRUE while the step (1) is active, the step (3)
is activated.
The step (1) becomes inactive. However, if it is a coil HOLD step [SC], the step
holds the coil output or action according to its attribute.