| 摘要 |
PURPOSE:To provide an automatic vending machine control system which ensures a high processing speed, can improve the overall control efficiency of a vending machine, and can facilitate the production and the maintenance of programs. CONSTITUTION:A control system controls the execution of the tasks 22 corresponding at least to plural functions consisting of the main control, the display control, the sale enable decision, the sale control, and the cash control respectively. Then the information at least on the selection of commodities, the propriety of sale, the amount, and the sold-out state are transferred among the tasks 22. Then the priority is decided based on these information for execution of the tasks 22. The information on the decided priority are stored in the control blocks 31 prepared to the tasks 22 respectively. These blocks 31 are linked together so that the queues 32 are formed in number equal to the priority, and an identifier is stored in each block 31 for identification of the tasks 22. Then these identifiers stored in the queues 32 are successively read out in the order of higher priority levels. Thus the executing order of the tasks 22 corresponding to the identifiers can be controlled. |
