Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 102

Block start step (without END check) [BS]
Block start step (without END check) [BS] is a step that activates the specified block.
When the transition becomes TRUE, the active state transitions to the next step.
(2)
The operation to be performed if multiple attempts to start one block are performed simultaneously or if an attempt to start an
already started block is performed follows the operation setting applicable to the block double start. ( Page 135 Act at
block multi-activated)
Only one block can be specified. To start multiple blocks simultaneously, use parallel branches and multiple block start steps.
■ Precautions
• An action cannot be created to the block start step (without END check) [BS].
8 SFC PROGRAM
100
8.2 Structure
(1)
X0
TRAN
After this step starts block (BL1), only the transition (2) is
BL1
checked and, when the transition becomes TRUE, execution
proceeds to the next step without waiting for the start destination
block to end.