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5 SEQUENCE INSTRUCTIONS
PAGE n
(1) This is a no operation instruction that has no impact on any operations up to that point.
(2) Causes processing from step 0 of the designated nth page of the program following the PAGE
n instruction. (Peripheral device display, printers, etc.)
(3) If there is no PAGE n instruction, processing begins from page 0.
[Operation Errors]
(1) There are no errors associated with the NOP, NOPLF, or PAGE instructions.
[Program Example]
NOP
(1) Contact closed .............. Deletes AND or ANI instruction
Before change
[Ladder Mode]
X8
0
4
After change
[Ladder Mode]
X8
0
4
(2) Contact closed .............. LD, LDI changed to NOP (Note carefully that changing the LD and LDI
Before change
[Ladder Mode]
X0
0
X56
2
5
After change
[Ladder Mode]
X0
0
5
5 - 53
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Y97
Y96
Changed to NOP
Y96
instructions to NOP completely changes the nature of the ladder.)
T3
Changed to NOP
T3
[List Mode]
Steps
Instruction
Y12
0
LD
1
AND
END
2
ANI
3
OUT
4
END
[List Mode]
Steps
Instruction
Y12
0
LD
1
NOP
2
ANI
END
3
OUT
4
END
[List Mode]
Steps
Instruction
Y16
0
LD
1
OUT
Y66
2
LD
3
AND
4
OUT
END
5
END
[List Mode]
Instruction
Steps
Y16
0
LD
1
OUT
Y66
2
NOT
3
AND
4
OUT
END
5
END
MELSEC-Q/QnA
Device
X8
Y97
Y96
Y12
Device
X8
Y96
Y12
Device
X0
Y16
X56
T3
Y66
Device
X0
Y16
T3
Y66
5 - 53
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