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Automating Manufacturing Systems - Process Control and ...

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plc states - 12.38<br />

6.<br />

a)<br />

button A + button B<br />

door idle<br />

motor on<br />

door opening<br />

thermal relay + 15 sec delay<br />

counter > 20,000<br />

reset button - assumed<br />

service mode<br />

b)<br />

Legend<br />

button A<br />

button B<br />

motor<br />

thermal relay<br />

reset button<br />

state 1<br />

state 2<br />

state 3<br />

lamp<br />

Machine:0.I.Data.1<br />

Machine:0.I.Data.2<br />

Machine:1.O.Data.3<br />

Machine:0.I.Data.3<br />

Machine:0.I.Data.4 - assumed<br />

Machine:1.O.Data.7<br />

www.PA<strong>Control</strong>.com

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