Siemens SIMATIC S7 FH - Logic Blocks with the BOOL Data Type

Fail-Safe Blocks
Fail-Safe Systems
A5E00085588-03
8-85
8.7 Logic Blocks with the BOOL Data Type
Block Description
F_AND4 AND logic operation on four inputs
F_OR4 OR logic operation on four inputs
F_XOR2 XOR logic operation on two inputs
F_NOT NOT logic operation
F_2OUT3 Binary selection 2 out of 3
F_XOUTY Binary selection X out of Y
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 IN3 IN4 OUT OUTN
0 00001
0 00101
0 01001
0 01101
0 10001
0 10101
0 11001
0 11101
1 00001
1 00101
1 01001
1 01101
1 10001
1 10101
1 11001
1 11110