Mitsubishi MELSEC Q Series, Руководство по программированию

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5.6 End Instructions
5.6.1 Ending main routine program
FEND
(3) Even sequence programs following the FEND instruction can be displayed in ladder display
at a peripheral.
(Peripherals continue to display ladders until encountering END.)
O p erat i on E rror
In any of the following cases, an operation error occurs, the error flag (SM0) is turned ON, and
the corresponding error code is stored to SD0.
• The FEND instruction is executed after the execution of the CALL instruction, and before
the execution of the RET instruction. (Error code: 4211)
• The FEND instruction is executed after the execution of the FOR instruction, and before
the execution of the NEXT instruction. (Error code: 4200)
• The FEND instruction is executed during an interrupt program, and before the execution
of the IRET instruction. (Error code: 4221)
• The FEND instruction is executed within the CHKCIR and CHKEND instruction loop.
(Error code: 4230)
• The FEND instruction is executed within the IX and IXEND instruction loop.
(Error code: 4231)
CJ
FEND
FEND
END
0
P
(a) W h en t h e CJ instruction is used
CALL
FEND
Interru p t p rogram
END
P
P
I
P
O p eration
p er f ormed
wh en t h e CJ
instruction is
not executed
Main routine
p rogram
Main routine
p rogram
Main routine
p rogram
Main routine
p rogram
Su b routine
p rogram
Jum p caused
b y t h e CJ instruction
O p eration
p er f ormed
wh en t h e CJ
instruction is
executed
( b ) W h en t h ere are su b routine and
interru p t p rograms