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Automating Manufacturing Systems - Process Control and ...

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plc flowchart - 11.10<br />

F4<br />

MCR<br />

tank full<br />

tank full<br />

U<br />

L<br />

L<br />

F4<br />

F6<br />

F5<br />

MCR<br />

F5<br />

MCR<br />

stop<br />

stop<br />

U<br />

L<br />

L<br />

F5<br />

F6<br />

F4<br />

MCR<br />

Figure 11.8<br />

Ladder Logic for Operations F4 <strong>and</strong> F5<br />

The ladder logic for operation F6 turns the outlet valve on <strong>and</strong> turns off the inlet<br />

valve. It then ends operation F6 <strong>and</strong> returns to operation F2.

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