| 摘要 |
PURPOSE:To prevent a magnetic card from nullified due to the simple mis-operation of a user by outputting nullifying information guide to show the fact to rewrite the effective display indicator of a magnetic medium as ineffective by the erroneous input of the next password number when the number of times of effective code of the magnetic medium arrives at that of error limitation of a password number specified in advance. CONSTITUTION:This automatic machine system informs the arrival of the number of times of effective code of the magnetic card read from the magnetic card when it occurs by outputting the nullifying information guide to the user before the next password input operation is performed. In other words, the nullification of the magnetic card is informed in advance when the number of times of use of the magnetic card arrives at that of error limitation of the password number and following that, the password number is inputted erroneously. Therefore, since the user performs input after judging whether or not the password number intending to input is correct, the erroneous input due to the simple mis-operation can be prevented. In such a way, the nullification of the magnetic card due to the storage error of the password number can be prevented from occurring. |
