| 摘要 |
PURPOSE:To attain the confirmation of a first data contents and to use a second data slip instead of a first data slip by outputting the contents equivalent to the first data by a second output means when a first output means is abnormal. CONSTITUTION:The first data are outputted by a first output means 5 and the second data are outputted by a second output means 6. Besides, the state of the first output means 5 is detected by a detecting means. Then, contents equivalent to the contents of the first data are made to be outputted by a second output means 6 by a substituting means when the first output means 5 is abnormal. Thus, the first data contents can be confirmed and besides, the second data slip can be used instead of the first data slip. |
