Fail-Safe Blocks
8.7
Logic Blocks with the BOOL Data Type
Block
F_AND4
F_OR4
F_XOR2
F_NOT
F_2OUT3
F_XOUTY
8.7.1
F_AND4
Function
This block links the inputs by means of AND. The output OUT is 1 if all the inputs
are 1. Otherwise, the output is 0. The output OUTN corresponds to the negating
output OUT.
Truth Table
IN1
IN2
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
Fail-Safe Systems
A5E00085588-03
Description
AND logic operation on four inputs
OR logic operation on four inputs
XOR logic operation on two inputs
NOT logic operation
Binary selection 2 out of 3
Binary selection X out of Y
IN3
IN4
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
OUT
OUTN
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
0
8-85