Programming a Programmable Logic Controler (PLC)
Programming a Programmable Logic Controler (PLC)
Programming a Programmable Logic Controler (PLC)
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ST, ongoing example<br />
The outputs (Ausgang) A1 and A2 are only set, if<br />
either the input (Eingang) E3 is set or E1 and E2 are<br />
set simultaneously.<br />
STD, State Transition Diagram (Zustandsgraph)<br />
level of language<br />
high<br />
low<br />
SFC<br />
1<br />
2<br />
T1<br />
N Fill<br />
S Empty<br />
STD<br />
0 1<br />
FBD<br />
analysis design<br />
coding<br />
A<br />
B<br />
AND<br />
LD<br />
C<br />
2<br />
ST<br />
C:=A AND NOT B<br />
LD A<br />
ANDN B<br />
ST C<br />
A B C<br />
-¦ ¦--¦/¦---------( )<br />
IL
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