Mitsubishi L02CPU User Manual page 142

With "Execute fall instruction" selected for in the Options dialog box of the programming tool, the fall instruction is executed
when the instruction is in the data written to the CPU module in the RUN status, even if the execution condition (on → off) is
not met. (The same operation as High Performance model QCPU)
[Tool]
The corresponding fall instructions are LDF, ANDF, ORF, MEF, PLF, FCALLP, and EFCALLP. The following describes the
operation with and without "Execute fall instruction" selected.
Operation when selecting
"Trailing edge instructions are not executed"
Completion of
X0
online change
A
END 0 END
1 scan
X0 status
ON
X0
OFF
OFF OFF
ON
M0
OFF
ON
X0
OFF
ON OFF
ON
M0
OFF
140
[Options...]
[ PLF M0 ]
A
0 END 0
The fall instruction is executed
even if the execution condition
is off off.
Operation when deselecting
"Trailing edge instructions are not executed"
X0
Completion of
online change
A
END 0 END 0
1 scan
X0 status
ON
X0
OFF
OFF OFF
ON
M0
OFF
ON
X0
OFF
ON OFF
ON
M0
OFF
[ PLF M0 ]
A
END 0
The fall instruction is not executed
even if the execution condition
is off off.
The fall instruction is not executed
when online change is completed
and the execution condition of
on off is met coincidentally.