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More Advanced Programming
The example above checks whether the contents of data registers D10 and D11 are greater
than the contents of registers D250 and D251.
More examples:
Ladder Diagram
0
Relay M12 is set to "1" when the value of counter C0 is equal to or greater than the contents of D20.
Ladder Diagram
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Output Y003 is switched on when the contents of D10 is greater than -2,500 and timer T52 has
finished running.
Ladder Diagram
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Relay M53 is set to "1" if either the value of counter C200 is less than 182,547 or relay M110 is
set to "1".
Compare as a logical AND operation
Ladder Diagram
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³ Compare condition
· First comparison value
» Second comparison value
An AND comparison can be used just like a normal AND instruction (see chapter 3).
The comparison options are the same as those described above for a comparison at the begin-
ning of an operation. Here too, you can also compare 32-bit values with an AND operation:
Ladder Diagram
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FX Beginners Manual
>= C0 D20
T52
> D10 K-2500
D< C200 K182547
M110
<= D40 D50
D= D30 D400
This "D" specifies 32-bit data
Instruction List
0 LD>=
M12
5 OUT
Instruction List
0 LD>
5 AND
Y003
6 OUT
Instruction List
0 LDD<
M53
9 OR
10 OUT
Instruction List
0 LD
1 AND<= D40
Instruction List
0 ANDD= D30
Compare Instructions
C0
D20
M12
D10
K-2500
T52
Y003
C200
K182547
M110
M53
...
D50
D400
5 – 19
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