End Step - Mitsubishi Electric MELSEC-Q Series Programming Manual

End step

An end step indicates that a series of processings in the corresponding block is all ended.
Operation of end step
When the end step is reached, the following processing is performed to end the block.
• All steps in the block are deactivated. (The held step are also deactivated.)
• The coil outputs turned ON by the OUT instruction are all turned OFF. When the special relay for output mode at end step
execution (SM327) is ON, however, the coil outputs of the held steps all remain ON.
• SM327 is valid only when the end step is reached. When a forced end is made by the block END instruction,
etc., the coil outputs of all steps are turned OFF.
• SM327 is valid for only the HOLD steps being held. The outputs of the HOLD steps that are not held as the
transition conditions are not satisfied are all turned OFF.
Continuing execution of active step
When the special relay for clear processing mode at arrival at end step (SM328) is turned ON, the execution of the active step
other than the one held in the block can be continued when the end step is reached. (The block is not ended if the end step is
executed.) However, when there is only the held step left in the block at arrival at the end step, the held step is deactivated
and the block ends if SM328 is ON.
For the Basic model QCPU, Universal model QCPU, and LCPU, SM328 can be used to continue execution of
active steps other than the one held in the block.
4 SFC PROGRAM CONFIGURATION
4.2 Steps
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