ABB REO 517 Applications Manual page 46

36
Logic function blocks
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AND function blocks are used to form general combinatory expressions with boolean
variables. The function block (figure 9) has four inputs (one of them inverted), desig-
nated Annn-INPUTm (Annn-INPUT4N is inverted), where nnn presents the serial
number of the block, and m presents the serial number of the inputs in the block. Each
AND circuit has two outputs, Annn-OUT and Annn-NOUT (inverted).
Annn
INPUT1
&
INPUT2
INPUT3
INPUT4
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The output signal (OUT) is set to 1 if the inputs INPUT1-3 are 1 and INPUT4N is 0.
See truth table below.
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0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
0 0
0 0
0 1
OUT
NOUT
1
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0 1
1 1
0 1
1 1
0 1
1 1
0 1
1 1
0 0
1 0
0 0
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0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1