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Automating Manufacturing Systems - Process Control and ...

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plc states - 12.13<br />

THIRD STATE WAIT FOR TRANSITIONS<br />

B3/3<br />

MCR<br />

I/2<br />

I/2<br />

B3/3<br />

B3/4<br />

MCR<br />

U<br />

L<br />

Figure 12.14<br />

Ladder Logic for State Three<br />

FOURTH STATE WAIT FOR TRANSITIONS<br />

B3/4 MCR<br />

T4:2<br />

RTO<br />

delay 4s<br />

T4:2/DN B3/4<br />

T4:2/DN B3/1<br />

U<br />

L<br />

T4:2/DN T4:2<br />

RST<br />

MCR<br />

Figure 12.15<br />

Ladder Logic for State Four

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