| 摘要 |
PURPOSE:To make the correction of stored contents accurate and make possible the improvement in data transmission efficiency by rewriting the contents of a memory circuit to redundancy codes at the initializing. CONSTITUTION:While guests rooms are under use, the display lamps of the corresponding rooms of a front display means 5 are lighted red and the lamps of a maid display means 6 are also lighted red. When a room is checked out, the display lamp goes off. Maids clean the rooms by viewing the display lamps and communicate the end of the cleaning to a fare charging device 2 by using telephone sets 3, then the display lamps go blue. In case the contents of a memory circuit 13 are unreliable on account of service interruption or the like, a initializing circuit 19 is operated and the contents of the memory circuit 13 are rewritten to redundancy codes 11, then the contents of the memory circuit 13 and the data from the fare charging device 2 reach noncoincidence; therefore, the stored contents are rewritten into the newest data and these are displayed respectively. |
