Title:
WIDE AREA MONITOR AND CONTROL DEVICE
Document Type and Number:
Japanese Patent JP3504489
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To surely collect data from all collection object stations even when any fault occurs at one line take-in port by respective providing line switching queues at two routes of line take-in ports of a line take-in means in 2:N configuration, distributing the collection object station to any station and selecting the object station through dequeue at the time of line switching.
SOLUTION: Line processing parts 12A and 12B of systems 0 and 1 take the first queues from queues Qa1 and Qb1 (1-7) (1-9), perform line connections to slave stations 0 and 1 and collect data. At the time when the data are completely collected from the slave stations 0 and 1, the slave stations 0 and 1 are enqueued to the final parts of the queues Qb1 and Qa1 (1-8) (1-10) and connected to slave stations 2 and 3 by performing the next dequeue (1-11) and (1-12) and data are collected. By repeating this operation, an opposite system is surely connected to the slave station, which is connected the last time, in the next cycle and data can be alternately collected from the slave stations.
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Inventors:
Hisashi Ohno
Junichi Takara
Junichi Takara
Application Number:
JP3884598A
Publication Date:
March 08, 2004
Filing Date:
February 20, 1998
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H04Q9/00; H04L12/24; H04L12/26; H04L12/28; (IPC1-7): H04L12/28; H04L12/24; H04L12/26; H04Q9/00
Domestic Patent References:
| JP5176009A | ||||
| JP685869A | ||||
| JP56146390A |
Attorney, Agent or Firm:
Masuo Oiwa (3 outside)