| 摘要 |
PCT No. PCT/JP89/00656 Sec. 371 Date Feb. 28, 1990 Sec. 102(e) Date Feb. 28, 1990 PCT Filed Jun. 30, 1989 PCT Pub. No. WO90/00339 PCT Pub. Date Nov. 1, 1990.Upon receipt of a request to change a connection from a lower processing unit (24-2), a higher processing, unit (23-1) informs, a management processor (20) of the request and receives an acknowledgment signal therefrom. A disconnect signal is produced when the lower processing unit (24-2) is separated from the higher processing unit (23-1) and sent to the management processor (20. When a notice that the lower processing unit (24-2) has been connected to processing unit 23-3 is sent to, the management processor (20), data is edited by the management processor 20 and the edited data to the processing units (22-2, 23-3). Finally, data for the lower processing unit (24-2) is deleted in the processing units (22-1, 23-1) that are part of the initial connections.
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