| 摘要 |
PURPOSE:To enable to set and change the number of retry times easily at the CPU side, by providing the retry counter register with the error control section of the lower side terminal control unit and setting the number of retrials from the CPU of upper side. CONSTITUTION:The terminal control unit 2 connected to CPU1 and subjected to the control provides the retry counter register 16 in the error control section. Further, the number of retrials is set to the register 16 among CPU1, and when error is taken place, the operation of error occurrence is repeated by the number of times set to the maximum register 16. Thus, at the CPU1 at upper rank, the setting and alteration of the number of retrials can easily be made. |
