80
8 SFC PROGRAM
8.2 Structure
Reset step [R]
Reset step [R] is a step that deactivates the specified step.
• The reset step [R] deactivates the specified step in the current block before executing the output of every scan. Except for
resetting the specified step, the reset step is the same as a normal step (without step attributes).
• The step No. of the coil HOLD step [SC] or S999 can be specified as specified step No. When the specified step No. is
S999, the coil HOLD steps [SC] that hold operations in the current block are all deactivated.
Block start step (with END check) [BC]
A step that activates the specified block.
When the specified block becomes inactive and the transition becomes TRUE, the active state transitions to the next step.
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 depends on "Act at block Multi-Activated." (Page 100 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 (with end check) [BC].
• The block start step (with END check) [BC] cannot be created immediately before convergence of a parallel convergence.
To create the step immediately before the convergence of a parallel convergence, use a block start step (without END
check) [BS].
When this step is activated, the block start step (with END check) [BC] starts
block (BL1).
No processing is performed until the execution of the start destination block
(BL1) ends and becomes inactive and the transition (2) is not checked.
When the execution of block (BL1) ends and becomes inactive, only the
transition (2) check is performed and, when the transition (2) becomes TRUE,
the transition to the next step occurs.
To Next Page
Loading...
