ISSN : 1796-2056
Volume : 3    Issue : 7    Date : July 2008

A Railway Signal Control System by Optical LAN and Design Simplification
Takashi Kunifuji, Jun Nishiyama, Hiroyuki Sugahara, Tetsuya Okada, Yamato Fukuta, and Masayuki
Page(s): 8-15
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When replace railway interlocking devices, setting up of large number of signal cables and
confirming of wiring connections are required. So, it is worried that serious transport disorder
caused by human error in wiring works would occur. We have developed a railway signal control
system utilized optical LAN to reduce the signal cables and wiring works.
Moreover, all signal devices operate independently, designers have to handle all devices one by
one and pay great attention to avoid causing harmful influence each other. We propose the
data-driven method to make easy to replace interlocking device. This logic is rearranged according
to the field device in order to simplify and decrease design duties of designers.
In this paper, we introduce this system, and describe network transmission, safety-related
communication and software configuration of the system.

Index Terms
railway signal control, optical LAN, design work