Arduino programming via Grafcet


Industrial production lines often use pneumatic cylinders to change the direction of movement of objects, closing the bottle caps to provide more treatment.
Figure shows the operating principle of a cycle


State Evolution the Grafcet :
v Rule 1: Initial State evolution requires active Steps at the beginning of operation (at least one).
v Rule 2: Transposition of a Transition a Transition is active or enabled only if all the Steps at its input are active (if not it is inactive).  A Transition can only be transposed if it is active and is true the associated condition (receptivity function).
v Rule 3: Evolution of active Steps the transposition of a Transition leads to the deactivation of all the Steps on its inputs and the activation of all Steps on its outputs.
v Rule 4: Simultaneous transposition of Transitions All active Transitions are transposed simultaneously. GRAFCET
v Rule 5: Simultaneous activation and deactivation of a Step In this case the activation has priority.

Description of Operation:
v The evacuation of the objects is done by a cylinder.
v The start of the operating cycle is done by the action of the cycle start button Dcy, and the cylinder A must be in position a1.
v The limit switch action a1 causes the actuator cylinder A to enter.
v The outlet from cylinder B to b1 allows the bottle to be capped.
v The limit switch action b1 causes the actuator cylinder B to enter.
v Finally a new cycle.
v The change in location of the cylinders allows for several applications with two displacements.


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