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Division 4.2.2 On-board ETCS functionality

United Kingdom

Original text. Later amendments are not shown.

This Basic Parameter describes the ETCS on-board functionality. It contains all functions to run a train in a safe way. The performance of the functions shall conform to Annex A, index 14 and 49. These functions shall be implemented in accordance with Annex A, index 1, 2, 4, 13, 15, 23, 53 and the technical specifications indicated below:

  • Communicating with the Control-Command Track-side Assembly. The in-fill data transmission function in ETCS Level 1 applications is only mandatory on-board under the conditions defined in Chapter 7. Data radio functionality for ETCS is only mandatory for ETCS Level 2 or ETCS Level 3 applications.

    • Eurobalise reception. See Annex A, index 9, 36, 43.

    • Euroloop reception. See Annex A, index 16, 50.

    • Radio transmission and radio messages protocol management. See Annex A, index 10, 11, 12, 18, 19, 22, 39, 40.

  • Communicating with the driver

    • Supporting driving. See Annex A, index 51.

    • Providing odometry information. See Annex A, index 51.

  • Communicating with the STM’s. See Annex A, index 8, 25, 26, 29, 36, 49, 52. This function includes:

    • Managing the STM’s output.

    • Providing data to be used by the STM.

    • Managing STM transitions.

  • Providing the automatic train protection function and cab-signalling. See Annex A, index 6, 7, 31, 37. This function includes:

    • Locating the train in a Eurobalise co-ordination system, which is the basis for supervising the dynamic speed profile.

    • Calculating the dynamic speed profile for its mission.

    • Supervising the dynamic speed profile during its mission.

    • Selecting the speed supervision mode.

    • Supervising the train according national values

    • Defining and providing the intervention function.

    • Setting the train characteristics.

  • Demonstrating the completeness of the train (train integrity) — mandatory for level 3, not required for level 1 or 2.

  • Equipment health monitoring and degraded mode support. This function includes:

    • Initialising the On-board ETCS functionality

    • Providing degraded mode support.

    • Isolation of the On-board ETCS functionality.

  • Support data recording for regulatory purposes. See Annex A, index 5, 41, 55.

  • Forwarding information/orders to the DMI and, when required, to the train interface unit, e.g. information where to close/open the air flaps, where to lower/raise the pantograph, where to open/close the main power switch, where to change from traction system A to traction system B. See Annex A, index 7.