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Automating Manufacturing Systems - Process Control and ...

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plc states - 12.36<br />

4.<br />

ST1<br />

B<br />

T2<br />

A<br />

T1<br />

ST2<br />

C * B<br />

T3<br />

T4<br />

C + B<br />

ST3<br />

FS = first scan<br />

T1 = ST2 ⋅ A<br />

T2<br />

=<br />

ST1 ⋅ B<br />

T3 = ST3 ⋅ ( C⋅<br />

B)<br />

T4 = ST2 ⋅ ( C+<br />

B)<br />

ST1 = ( ST1 + T1) ⋅ T2 + FS<br />

ST2 = ( ST2 + T2 + T3) ⋅T1 ⋅T4<br />

ST3 = ( ST3 + T4 ⋅ T1) ⋅ T3<br />

ST2<br />

ST1<br />

A<br />

B<br />

T1<br />

T2<br />

ST3 C B<br />

T3<br />

ST2<br />

T2<br />

C<br />

B<br />

ST1<br />

T1<br />

first scan<br />

T4<br />

ST1<br />

T1<br />

T4<br />

ST2<br />

ST2<br />

T2<br />

T3<br />

T3<br />

ST3<br />

ST3<br />

T4<br />

T1<br />

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

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