| 摘要 |
PURPOSE:To assure an equipment action even when an equipment parameter is changed by a mistake due to a cause such as the wear of a battery and the fault of the equipment by comparing the sum of the equipment parameter stored into a RAM part and the checking sum data. CONSTITUTION:When an equipment power source is turned on and the equip ment starts an action, a value to read equipment parameter data 16 stored in a RAM part 12 and add totally the data from an address 00 up to an address 29 is compared with checking sum data 17 stored beforehand, and when both come to be the value '5', a 'no abnormality' is judged and an usual equipment action is started. On the other hand, when due to a reason such as the wear of the battery 15 and the abnormality of the equipment, the equipment parame ter data 16 or the checking sum data 17 are erroneous, a control part 11 reads an initial pattern from a ROM part 13, writes it to the RAM 12 and assures that a basic action is executed. After the writing is executed, the control part 11 starts an usual action. |
