Siemens SIMATIC S5-100U System Manual page 162

STEP 5 Operations
AND before OR Operation
Output Q 1.0 is "1" when at least one AND condition has
been satisfied.
Output Q 1.0 is "0" when neither of the two AND conditions
has been satisfied.
STL
I 0. 0
A I 0.0
A I 0 1
O
I 0.1
A I 0.2
A I 0.3
I 0.2
= Q 1.0
I 0.3
8-4
Example
CSF
&
=1
>
&
Circuit Diagram
I 0.0
I 0.1
I 0.0
I 0.2
Q 1.0
S5-100U
I 0.2
I 0.3
Q 1.0
LAD
Q 1.0
I 0.1
I 0.3
EWA 4NEB 812 6120-02b