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Automating Manufacturing Systems - Process Control and ...

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plc sfc - 20.8<br />

CHECK TRANSITIONS<br />

transition 1<br />

automatic on<br />

L<br />

step 2<br />

U<br />

transition 1<br />

transition 7<br />

reset button<br />

L<br />

step 1<br />

U<br />

transition 7<br />

transition 2<br />

part detect<br />

L<br />

step 3<br />

U<br />

transition 2<br />

transition 3<br />

bottom limit<br />

L<br />

step 4<br />

U<br />

transition 3<br />

U<br />

transition 4<br />

transition 4<br />

stop button<br />

L<br />

step 5<br />

U<br />

transition 3<br />

U<br />

transition 4<br />

Figure 20.6<br />

SFC Implemented in Ladder Logic

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