User Manual

LOGO! functions
4.2 Basic functions list - GF
LOGO!
Manual, 04/2011, A5E03556174-01
149
4.2.7 XOR (exclusive OR)
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
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4
7KH;25LQDFLUFXLWGLDJUDPVKRZQ
DVVHULHVFLUFXLWZLWKFKDQJHRYHU
FRQWDFWV
6\PEROLQ/2*2
The output status of the XOR is 1 if the inputs are not equivalent.
At an unused block input (x): x = 0.
XOR function logic table
1 2 Q
0 0 0
0 1 1
1 0 1
1 1 0
4.2.8 NOT (Negation, Inverter)
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
4
$EUHDNFRQWDFWLQWKHFLUFXLW
GLDJUDP
6\PEROLQ/2*2
The output status is 1 if the input is 0. The NOT block inverts the input status.
Advantage of the NOT block, for example: LOGO! does not require break contacts. You
simply use a make contact and the NOT block to convert these into a break contact.
NOT function logic table
1 Q
0 1
1 0