Title:
TRANSMISSION LINE DISCONNECT DETECTION METHOD AND SLAVE STATION TERMINAL USED THEREIN
Document Type and Number:
WIPO Patent Application WO/2013/046296
Kind Code:
A1
Abstract:
[Problem] To provide a transmission line disconnect detection method that can accurately detect a break in a transmission line in a control and monitoring signal transmission system that uses a transmission synchronization system in which by using a transmission clock a master station connected to a single controller is synchronized with a plurality of slave stations corresponding to a plurality of devices to be controlled and in which data is transmitted through a common data signal line, and to provide a slave station terminal used therein. [Solution] A series of pulsed signals output from a master station to common data signal lines are provided with a management data region that is comprised of a plurality of pulsed signals and that differs from a control and monitoring data region which is comprised of control data signal data and monitoring data signal data. In the management data region, a signal comprising specific individual data from a slave station is superimposed during an output data period in which signals comprising management control data that identifies a single slave station are superimposed and an input data period corresponding to the output data period and of the same cycle, and the presence or absence of a line break is determined on the basis of the results of comparing specific individual data and comparison data.
Inventors:
NISHIKIDO KENJI (JP)
HOSHI YOUICHI (JP)
ITANI KAZUO (JP)
HOSHI YOUICHI (JP)
ITANI KAZUO (JP)
Application Number:
PCT/JP2011/071885
Publication Date:
April 04, 2013
Filing Date:
September 26, 2011
Export Citation:
Assignee:
ANYWIRE CORP (JP)
NISHIKIDO KENJI (JP)
HOSHI YOUICHI (JP)
ITANI KAZUO (JP)
NISHIKIDO KENJI (JP)
HOSHI YOUICHI (JP)
ITANI KAZUO (JP)
International Classes:
H04L69/40; H04L25/02
Foreign References:
| JPS62173830A | 1987-07-30 | |||
| JPH0799503A | 1995-04-11 | |||
| JPH0984155A | 1997-03-28 |
Attorney, Agent or Firm:
MIYABE TAKESHI (JP)
Takashi Miyabe (JP)
Takashi Miyabe (JP)
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Claims:
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