Multiplex communication system for sequence controllers
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 14, 1989
Grant Date -
N/A
app pub date -
Aug 24, 1988
filing date -
Aug 24, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Among systems configured by connecting a plurality of sequence controllers to one communication line to intercommunicate, many systems has been disclosed which implement fault location and recovery from the faults. In one of these systems, each substation is connected to a circulating communication line via a branch line and switches are respectively disposed on the branch line and on the communication line at both sides of a connecting point of the branch line and the communication line. Further, the communication line can be formed in a loop by a spare line. In another of these systems, an integrated portion of the communication line is formed near the master station, and the communication line is connected to the master station and is configured of one continuous line which goes and backs in sequence between the integrated portion and vicinity of each substation. In that integrated portion, a switch is disposed on each one of two lines, which connect the integrated portion and each substation. Further, a switch is provided on a line which bypasses these two switches. Other systems are a composite of the above systems. Still other systems have automated portions of fault location and fault recovery.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully