Introduction to Industrial Automation

Figure 10.8  Automated billiard table controlled by a PLC.

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  Introduction to Industrial Automation

  3. When the PLC receives an “empty” signal (S

1

 or S

3

), then the electrovalve V

1

 or V

2

 opens 

immediately and the central electrovalve V

0

 opens after 5 s. Then, when the signal “fill” (S

2 

or S

4

) is received, the electrovalve V

0

 closes immediately and the electrovalve V

1

 or V

2

 closes 

after 10 s.

  4. All electrovalves close immediately after the press of the OFF button.

Design a diagram with the connection statuses of the I/O devices and the corresponding addresses, 

and subsequently, write the required PLC program.