| 摘要 |
PURPOSE:To save labor and time by storing the number of an abnormal node computer on a node computer state information register table and executing transmission to the other alternative node computer of high priority order. CONSTITUTION:When a node CPU 1 executes the transmission to a node CPU 2, which is a first preferential destination, by a communication protocol 'A' type, any response is not returned from the CPU 2 or the message of an unprocessable state is returned. At such a time, the column of a state '9' for the CPU 2 in the table of the CPU 1 is changed from '1' to '0' by a means, which determines an alternative transmission determination node CPU and executes the transmission, and the transmission is executed to a node CPU 4, which is ranked in the second priority order out of the 'transmission destination priority order' 8, by a communication protocol 'B' type. When the transmission processing is finished, it is informed of another node CPU 3 by a means to send abnormal information that the CPU 2 is abnormal. Thus, the state of the CPU can be grasped at real time and the transmission destination can be automatically switched to the alternative transmission destination. |
