Basic Instructions
2
−
35
Outline
No operation
5
Program example
Ladder Diagram
Boolean
Ladder Diagram
Address
Instruction
X0
0
Y10
X2
X1
・
NOP
0
1
2
3
4
ST
X
0
AN
X
1
NOP
AN/
X
2
OT
Y
10
Description
This instruction has no effect on the operation result to that point.
The same operation takes place without a
NOP
instruction.
The
NOP
instruction can be used to make the program easier to read when checking or correcting.
When you want to delete an instruction without changing addresses, write a
NOP
instruction (overwrite the
previous instruction).
When you want to move the addresses of one part of a program without changing the program, insert a
NOP
instruction.
This is a convenient means of breaking a long program into several blocks.
Example:
To move the starting point of a program block from address 39
to address 40, insert a NOP instruction at address 39.
Address
36
ST X0
・
OR X1
・
OT Y10
39
ST X2
40
AN X3
・
OT R20
・
ST R2
・
DF
44
ST X3
Address
36
ST X0
・
OR X1
・
OT Y10
39
NOP
40
ST X2
41
AN X3
・
OT R20
・
ST R2
・
DF
45
ST X3
Insert a
NOP
instruction.
This moves the
starting point to
address 40.
Deleting a NOP instruction
To delete the
NOP
instruction after editing in the PROG. mode, use the programming tools.
NOP
No operation
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