Siemens LOGO! Series Manual page 147

4.2.5 OR
The output status of the OR element is only 1 if at least one input is 1, i.e. at least one of the
contacts is closed.
At an unused block input (x): x = 0.
OR function logic table
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
LOGO!
Manual, 04/2011, A5E03556174-01
2 3
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
LOGO! functions
4.2 Basic functions list - GF
4 Q
0 0
1 1
0 1
1 1
0 1
1 1
0 1
1 1
0 1
1 1
0 1
1 1
0 1
1 1
0 1
1 1
147