Mitsubishi Electric MELSEC-Q Series Programming Manual page 45

■When the SET, basic or application instruction is used
If a transition to the next step occurs and the corresponding step becomes inactive, the device remains ON or the data stored
in the device is held. To turn OFF the ON device or clear the data stored in the device, use the RST instruction, etc. at another
step.
■When the oC instruction is used:
• The counter counts once every time the transition condition is satisfied and the corresponding step that is inactive is
activated.
Example:
Transition
condition n
Step n oC0 K10
• To cause the counter to count once when the input condition turns ON and execution to proceed to the next step when the
counter counts up,
Create a counter ladder in a sequence program; or
Create an SFC diagram using a jump transition on MELSAP-L.
In the program example shown below, the counter counts once every time X10 turns ON, and execution proceeds to the next
step when C0 counts up.
When creating counter ladder in sequence program
When transition condition "n" becomes satisfied at the step "n" operation output where
Y0 is ON (by SET instruction), the Y0 ON status will be maintained even after the
transition to step "n + 1".
Counter C0 counts once when transition condition n is satisfied and execution proceeds
to step n.
When using jump transition on
MELSAP-L
4 SFC PROGRAM CONFIGURATION
When creating program with
MELSAP3
4.2 Steps
4
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