Siemens SIMATIC S5 Manual page 99

S5-115F Manual
AND operation
The AND operation scans to see if various conditions are satisfied simultaneously.
Output Q 3.5 is "1" when all three inputs are "1".
The output is "0" if at least one input is "0".
The number of scans and the sequence of the logic
statements are optional.
STL
A I 1.1
A I 1.3
A I 1.7
= Q 3.5
OR operation
The OR operation scans to see if one of two (or more) conditions has been satisfied.
Output Q 3.2 is "1" when at least one of the inputs is "1".
Output Q 3.2 is "0" when all inputs are "0"
simultaneously.
The number of scans and the sequence of their
programming are optional.
STL
O I 1.2
O I 1.7
O I 1.5
= Q 3.2
EWA 4NEB 811 6149-02
Example
CSF
I 1.1
&
I 1.3
I 1.7
Example
CSF
I 1.2
1
=
>
I 1.7
Q 3.2
I 1.5
Q 3.5
I 1.1
I 1.2
I 1.2
I 1.7
I 1.5
STEP 5 Operations
Circuit Diagram
I 1.1
I 1.3
I 1.7
Q 3.5
LAD
I 1.3
I 1.7 Q 3.5
Circuit Diagram
I 1.5
I 1.7
Q 3.2
LAD
Q 3.2
3-3