| 摘要 |
<p>PURPOSE:To improve supply of a power source by supplying the power source to a shared memory belonging to one control device, from its control device, so that write/read-out can be executed to the shared memory from any control device. CONSTITUTION:When a power source 13 is turned on by a switch, and a control device 12 and a shared memory 15 start an operation, the shared memory 15 is initialized by a necessary time. A control line 17 informs to a control device 11 that the shared memory 15 can be operated by turning on the power source. The control device 11 detects a fact that it is necessary to store the same contents as those of a shared memory 14, in the shared memory 15, by said information, and writes the contents of the shared memory 14 in the shared memory 15. After this write has been completed, updating/read-out of a data are executed by the shared memory 14 and the control device 12. Also, in a necessary range, the control device 11 and 12 execute write, and both the shared memory 14 and 15 execute updating simultaneously.</p> |
