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LOGO! functions
4.2 Basic functions list - GF
LOGO!
Manual, 04/2011, A5E03556174-01
Manual, 04/2011, A5E03556174-01
145
4.2.3
NAND (not AND)
4
3DUDOOHOFLUFXLWZLWKPXOWLSOHEUHDN
FRQWDFWVLQWKHFLUFXLWGLDJUDP
FRQWDFWVLQWKHFLUFXLWGLDJUDP
6\PEROLQ/2*2
The output of the NAND is only 0 if the status at all inputs is 1, i.e. the contacts are closed.
At an unused block input (x): x = 1.
At an unused block input (x): x = 1.
NAND function logic table
1
2
3
4
Q
0
0
0
0
1
0
0
0
1
1
0
0
1
0
1
0
0
1
1
1
0
1
0
0
1
0
1
0
1
1
0
1
1
0
1
0
1
1
1
1
1
0
0
0
1
1
0
0
1
1
1
0
1
0
1
1
0
1
1
1
1
1
0
0
1
1
1
0
1
1
1
1
1
0
1
1
1
1
1
0