Nor (Not Or); Table Of The Nor Logic - Siemens Logo! Manual

LOGO! functions

4.2.6 NOR (NOT OR)

Circuit diagram of a series cir-
cuit with several break contacts:
The output status of the NOR is only 1 if all inputs are 0,
i.e. if switched off. The NOR output is set to 0 when one of
the inputs is switched on (logical 1 status).
At an unused block input (x): x = 0.

Table of the NOR logic

1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
122
2 3 4
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
Symbol in LOGO!:
Q
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
LOGO! Manual
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