Artykuły :: Telematics :: ATST
|Execution of contradictory commands in automatic line block system|
Execution of contradictory commands in automatic line block system
Railway Scientific and Technical Centre, ChĹopickiego 50, 04-275 Warszawa, Poland,
railways, signalling, line block
The automatic line block system may be constructed as a chain of autonomous distributed set of functional blocks located along a railway line section, interlocked by the data transmission subsystem and controlled from two ends of the section. Thus, a certain possibility of simultaneously issued contradictory commands creating conflicts during their execution to be settled by a functional block controlled by them particularly while the data transmission subsystem failure occurs have to be considered. Testing of automatic line block system proper functioning in a range of reaction to contradictory commands and examples of typical conflicts and general rules of solving them are discussed in the paper.
 EN 50129:2007, Railway applications: Safety related electronic systems.
 EN50159-1:2001, Railway Applications: Communication, Signalling, and Processing Systems - Part 1: Safety-related Communication In Closed Transmission Systems.
 OLPIĹSKI W., Opinion on automatic line block SHL-12 type in single section version., CNTK, task 4171/10, Warsaw, December 2006.
 OLPIĹSKI W., TORUĹ A., Automatic line block SHL-1 computer system adapted to co-operation with Ebilock 950 type interlocking system. Technical opinion., CNTK, task 4250/10, Warsaw, June 2007.
 OLPIĹSKI W., TORUĹ A., Rapport from exploitation test of the automatic line block system SHL-1 version 01 type., task 4283.04/10, Warsaw, May 2008.
 OLPIĹSKI W., Automatic line block SHL-1 version 01 type. Technical opinion., CNTK, task 4283.04/10, Warsaw, September 2008.
 OLPIĹSKI W., Automatic line block SHL-12 version 02 computer system. Technical opinion, CNTK, task 4362.04.10, Warsaw, March 2009.
 Principles of Technical Approval for Signalling and Communications Technology - Mu 8004, Deutsche Bundesbahn..
 Safety requirements for railway signalling systems introduced as binding by General Direction of Polish State Railways document no. KA2b-5400-01/98, Warsaw, February 1998.