User Manual

LOGO! functions
4.2 Basic functions list - GF
LOGO!
148 Manual, 04/2011, A5E03556174-01
4.2.6 NOR (not OR)
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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.
NOR function logic table
1 2 3 4 Q
0 0 0 0 1
0 0 0 1 0
0 0 1 0 0
0 0 1 1 0
0 1 0 0 0
0 1 0 1 0
0 1 1 0 0
0 1 1 1 0
1 0 0 0 0
1 0 0 1 0
1 0 1 0 0
1 0 1 1 0
1 1 0 0 0
1 1 0 1 0
1 1 1 0 0
1 1 1 1 0