| 摘要 |
PROBLEM TO BE SOLVED: To obtain a doubled system wherein a slave-system machine is placed in a standby state and immediately replaces a master-system machine if the master-system machine becomes abnormal by copying task classes from the master-system machine in a normal state to the slave-system machine in a cold standby state. SOLUTION: This doubled system holds task classes 51, 52... in a memory so that they can dynamically be corrected, enables an activator 2 to make a mode shift, and provides a mode wherein the task classes are copied as one of modes, and is equipped with a task class copying mechanism 8 which copies the task classes in the mentioned copy mode and a task class editing mechanism 9 which edits the task classes at execution time.
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