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An Introduction to Programming
3.4.5
OR operations
Instruction
OR
ORI
An OR operation is logically the same as the
parallel connection of multiple switches in an
electrical circuit. As soon as any of the
switches is closed current will flow. Current will
only stop flowing when all the switches are
open.
Example of an OR instruction
Ladder Diagram
X000
0
X001
In the example output Y0 is switched on when either input X0 or input X1 is on:
FX Beginners Manual
Function
Logical OR (OR operation with poll for
signal state "1" or ON)
Logical OR NOT (OR operation with poll
for signal state "0" or OFF)
Y000
OR instruction
ON
(1)
X0
OFF
(0)
ON
(1)
X1
OFF
(0)
ON
(1)
Y0
(0)
OFF
The Basic Instruction Set
Symbol
GX Works2 FX
Instruction List
0
LD
X000
1
OR
X001
2
OUT
Y000
t
F5
F6
3 – 11
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