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Fig. 7. Analysis of cause of cable breakdown
Fig. 8. Analysis of electronic interlocking system breakdown
number of functions when the time comes to replace the equipment. More-
over, equipment would be changed for less likelihood of mistakes, such as
reduction of wiring work.
2. Design and manufacture (CTC/PRC and cable).
In addition to taking measures, in factory pre-shipment tests, reviews of
control technique was conducted to prevent system down caused by un-
predictable software bugs (3rd cycle of RAMS).
In addition, since making connections on site may be a factor in manu-
facturing mistakes, processing on the site has been stopped.
3. Constant failure (electronic interlocking system and cable).
It is dicult to prevent a transitory error by a component before failures
occur. For an electronic interlocking system, the duplex system is stan-
dard. We examined control techniques when the system down occurred
(3rd cycle of RAMS).
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