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FBD:
5．Counting Control for Packing Machine
Requirement：
1) The packing cycle is that it begins counting the finished products in the assemble line,
when the counting value reaches 12, it proceeds packing operation which takes 5
seconds. After finished, it begins a new cycle.
2) It simultaneous counts the finished packs of product.
3) In case of power failure, the counting remains unchanged.
Analysis：
1) A transducer is employed to produce the pulse signal when the transducer detects
the arrival of a product. A counter generates an output when the counting value reaches
12 and a timer is employed to have a delay of five seconds.
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