| 摘要 |
PURPOSE:To prevent mistake due to change, by providing a shelf containing a package and a recognition section connected electrically corresponding to this package, forming a circuit when the package is loaded to the shelf and storing the said recognition section for the said loading. CONSTITUTION:A shelf 12 is loaded with a basis package 100 and extension packages 101, 102.... Storage elements 110, 111, 112... loaded with lines 20, 21, 22... are loaded with packages 100, 101, 102.... When the package 101 is loaded to, e.g., the package 100 loaded to the shelf 12, the loaded package is plug-in- connected to form a circuit and a ground signal is given to the storage elements 110 and 111. The elements 110 and 111 recognize that the package is loaded with the ground signal. As a result, the operator does not require the change in the system file and the situation of loading of packages can be recognized to the file and the storage device. |
