| 摘要 |
In a terminal control unit, such as a display device (2), a control program is stored in a memory device which can electrically rewrite its data, such as a flash ROM (2b). The terminal control unit has a card connector (2d) provided therefor, and upon insertion of a memory card storing a control program for updating, into the card connector (2d), the control program for updating is transcribed from the memory card into the memory device, whereby updating of the program is performed. Further, when the updating operation is started, a main control unit (1) is notified of start of the updating operation, and therefore the main control unit (1) is prevented from executing a communication abnormality determining process even if it does not receive a response from the terminal control unit. By virtue of this setting, in a control system for the automatic vending machine, which is comprised of the plurality of terminal control units and the main control unit which integratedly controls the terminal control units, the control program for controlling each terminal control unit can be readily updated while the communication abnormality determining process is prevented from being executed.
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