| 摘要 |
PURPOSE:To enable to keep the continuity of status even with the computer selected, by giving the transmission information status managing the transmission information table and the state of transmission, in the common memory between the two sets of master computers. CONSTITUTION:The master computer unit 1 forms the transmission information of unit control when the event to perform the control of unit is taken place to the slave station computer unit 2, and the information is stored in the transmission information table 15 in the common memory. This information is fed sequentially to the transmission area and fed to the unit 2 via the computer linkage unit 7 and the MODEM8. In this case, the transmission information status table 16 is formed in the common memory, the state of transmission is managed, and the renewal of the transmission information in the waiting table is controlled. By managing the transmission information with the tables 15 and 16, even after the selective operation at the occurrence of failure of one set out of CPU3 and 4, the transmission information can continuously be transmitted to the unit 2. |
