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GRAFCET abbreviation derives from

A macro-step is a representation of

How many rules define the GRAFCET evolution?

Variable Xi represents a Boolean variable such that

A transition to be enabled has to have all the immediate preceding steps active

A pit step has only a transition immediate preceding.

A source transition does not have any immediate preceding step.

A predicate is a logical expression with one or more variables.

A transition-condition is

In Grafcet which set of steps define the state of the automated system command part?