End Step - Mitsubishi MELSEC-Q Series Programming Manual

4 SFC PROGRAM CONFIGURATION

4.2.10 End step

An end step indicates that a series of processings in the corresponding block is all ended.
(1) When the end step is reached, the following processing is performed to end the block.
(a) All steps in the block are deactivated.
(The held step are also deactivated.)
(b) 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.
POINTS
(1) 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.
(2) 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.
(2) 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. *1
(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.
When there is normal active step left
When SM328 is turned ON,
processing of active step is
continued.
REMARKS
*1: 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.
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When there is HOLD step, whose
transition condition is not satisfied
(which is not held), left
Transition
When SM328 is turned ON,
processing of HOLD step is continued.
When there is held active step left
SE
Transition
Block is ended independently
of whether SM328 is ON or OFF.
SE
Transition
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