6 nor (not or), Nor (not or) – IDEC FL1E SmartRelay User Manual
Page 133
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IDEC SmartRelay functions
IDEC SmartRelay Manual
119
4.2.6
NOR (not OR)
Circuit diagram of a series circuit with
several normally closed contacts:
Symbol in IDEC
SmartRelay:
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
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