... normallyclosed contacts, and commands. The I1 and I5 are input signals from a clamp proximity switch and a pushbutton,respectively; the signals M1, M2, and M5 represent memory locations; and Q1 represents ... (((I1 and M1)or (I5 and M2)) and not M5) then Q1;” or equivalently “If the clamp is closed and the system is in auto mode, orthe move button is pressed and the system is in manual mode, and there ... uses in a wide variety of applications such as communication protocols,manufacturing systems, and software development. A good survey on properties, analysis, and applications of Petri nets...