3.3 OR, OR/ (OR, OR NOT)
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Ladder diagram
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Devices that can be specified (indicated by ●)
Operand
Bit device
Specification of bit of
word device
Index modifier
X Y R L T C P E
S
R
IN
O
T
DT.n LD.n
OR, OR/ bit ● ● ● ● ● ● ● ● ● ● ● ● ● ●
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Outline of operation
Type of
instruction
Operation
OR
Executes an OR operation with the preceding operation result in parallel connection by treating
the input contact specified by the OR instruction as a Form A (normally open).
OR/
Executes an OR operation with the preceding operation result in parallel connection by treating
the input contact specified by the OR/ instruction as a Form B (normally closed).
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Operation Example
Program operation of "OR" and "OR/" in the ladder diagram
If any of the conditions of X100 ON, R1 ON, or R2 OFF is satisfied, the result is output to Y110.
3.3 OR, OR/ (OR, OR NOT)
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