Siemens Simatic S5 Operating Instructions Manual page 7

Keyboard
Positioning keys:
Keys for inputting the program
:
end of program
Select start of program
.
next network
Select previous network
. next statement
Select previous statement
STL
LAD
\
Logic AND Contact connnected
in series
Logic OR Single parallel
contact
Scan for Identifies normally
"Zero" closed contacts
OR operation Mark to denote the
of AND
termination of a
functions parallel branch
W operation
Beginning of a
,
j .
'
of bracketed parallel branch
expressions:
"A("