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Jack H.Integration and automation of manufacturing systems.2001.pdf
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page 564

turn the coffee machine petri net diagram into ladder logic

20.7 PRACTICE PROBLEMS

1. Develop a Petri net to control a part sorting station. Parts enter on a conveyor belt and are detected by a proximity sensor. The part can then be checked with a vision system that will signal to the PLC that the part is good/bad. There are then two cylinders that can eject the part into a good or bad bin.

page 565

20.8 REFERENCES

Peterson, J.L., “Petri Net Theory and the Modelling of Systems”, Prentice-Hall, Inc., N.J., U.S.A., 1981.

Reisig, W., “Petri Nets; An Introduction”, Springer-Verlag, 1985.