| 摘要 |
PROBLEM TO BE SOLVED: To improve the reliability of system operation by preparing a port for storing the states of loaded cards when a monitor/control card can not be used. SOLUTION: A card 3 stores a program to be executed by a card 1, a card 4 stores local data, a card 6 stores its own state extracted at each fixed time, and the states of these cards 3, 4, 6 are stored in a port 7. A card 2 stores the states of the cards 1, 3, 4 through a bus 10 and stores the state of the card 6 through a card 5 and the bus 10. The card 1 judges whether the card 6 can be transmitted or not at the time of its transmitting, but when the card 2 can not be used due to its abnormality, extracts information stored in the port concerned, checks the possibility of transmission and clears the check port. |
