The document provides an overview of the Automatic Train Supervision (ATS) subsystem. It describes the ATS architecture with three levels including one Central ATS and multiple Local ATS units. The ATS subsystem monitors train movement, controls signaling equipment, generates schedules and alarms. It integrates various components including servers, switches and workstations located in technical rooms. The document outlines the functions of ATS including automatic route setting, train regulation, and interfacing with signaling and train control equipment. It also discusses the different line operating modes of ATS such as manual, constant headway and scheduled operations.

1. Presentation
on
ATS Sub-System

2. Automatic Train Supervision(ATS)
 Automatic Train Supervision(ATS) is a Sub-System of Signalling
and Train Control System (S&TC)
 ATS sub-system which can be shortly presented as a sub-system
which shall have data processing facilities & achieve the
minimum following main functions but not limited to,
1. Monitor and Control the traffic through continuous
Automatic Train Control equipment, perform automatic route
setting, automatic train regulation etc.
2. Monitor & regulate train movement continuously.
3. Display information on PIDS (Passenger Information Display
System).
4.Generation of the schedules.
5.Generate alarms & store system-operating data.
6.Analysis of operation and faults.

3. The ATS sub-system architecture can be split in 3 Levels:
1. One Central ATS: CATS
2.Three Local ATS (LATS) and One Depot ATS (DATS)
3.Each LATS/DATS connected ASCV and ATC

4. ATS sub-system General Overview

5. Global Architecture

6. Central Cabinet Architecture

7. LATS cabinet

8. SLAN general architecture (for MSS and SSS
stations only

9. ATC & ASCV Interface Status

10. Following LRUs are mainly integrated in the ATS
cabinets, which are located in technical rooms.
1 ATS Server
2 FEP
3 KVM Drawer
4 KVM Switch
5 Optical Switch
6 Power Supply for Optical Switch
7 Ethernet Switches
8 Data Logger
9 Workstation CPU

11. CATS CABINET

12. LATS CABINET

13. ATS Mini-Cubicle

14. ATS Sub-System connected to ASCV and ATC Sub-System
through Switching Unit

15. Contd....

16. System View

17. HMI Related Icons

18. Territory Assignment (TAS)
 For Signalling equipment management, a Take
Control / Release procedure is available :
 No operator is controlling the ASCV signalling view
then Responsibility symbol will be red
 Click on the TAKE CONTROL button to take control
of the displayed ASCV Signalling view. The
Responsibility symbol is updated with green colour.
 Click on the RELEASE button to release control of
the displayed ASCV signalling view. The
Responsibility symbol is updated with red colour.

19. .

20. ARS Principles
 In Scheduled mode, all the routes associated with the trips
described in the timetable are automatically set by the ARS
function
 In Constant Headway, routes are automatically set by the
ARS function according to the origin/destination platforms
and turn-backs selected by the operator. When the train is
arrived at destination it is automatically re-indexed
 When an ATS sector is controlled in local, the train identity
of a train entering in the sector is recovered from the
previous Local ATS through the PTI management function

21. Automatic train regulation (ATR)
 Automatic Train Regulation relies on train concept, train
movement events, and trip to regulate trains,
automatically. Also, it uses services provided by Topology
to collect context-specific data to apply regulation
strategies.
 Major goal is to detect and correct disturbances in
comparison to trip assigned to train and inform operator of
the observed disturbances.
 The ATR strategies apply automatic commands to respect
the defined constant headway (this headway is defined in
the trip assigned to the train) or to respect adherence to
schedule (arrival/departure of trains) expected by
timetable. These commands are mainly the dwell time
calculation and speed profile.
 Moreover, this components manages the skip/stop train
status and the change of end instructions to ATO.

22. Line operating mode
 The line operating mode is managed according to
the line control level (ATS Control level or Local
Control level)
 Manual mode
 Constant headway mode
 Scheduled mode

23. Contd...

24. Manual Mode
 Trains are not regulated
 Routes need to be set manually
 Cycles need to be set by the operator so that routes will
be automatically set on cycle approach
 Train stop is carried out in station if a train hold has
been previously set (TH sets: red, TH not set: grey)

25. Constant Headway
 In Constant Headway routes are automatically set by the ARS function
according to the origin/destination platforms and turn-backs selected
by the operator. When the train is arrived at destination it is
automatically re-indexed
 Trains are regulated
 Regulation is based on the Headway which is the time interval between
two train departures from the same platform
 Stop on platform is controlled and regulated by the Automatic Train
Regulation (ATR) function
 – When a train is in advance compared with the previous one, ATR
function delays the train departure from this platform by increasing the
dwell time in the limit of the maximum dwell time
 – When a train is delayed compared with the previous one, ATR
function reduces the train departure from this platform by decreases
the dwell time in the limit of the minimum dwell time
 Since the Automatic Route Setting function is active, routes will be set
automatically by the ARS function as trains arrive in the turn back
approach zones. The operator does not need to set cycles in turn back
zones

26. Contd...
 In Controls tab:
 – From Manual mode, click Constant Headway
 – Select the departure station (From)
 – Select the destination station (To)
 – If needed scroll to select another turn back
 – Enter the HEADWAY value
 The headway value must be upper than the recall minimum
headway value
 – Click OK
 Parameters are updated.
 – Click OK
 Parameters are updated.
 – Click Yes to confirm
 Cycles must not be set by the operator

27. Contd...

28. Contd...

29. Schedule mode
 In Scheduled mode, the ATS automatically
 – Numbers trains,
 – Sets the routes
 – Regulates trains with respect to the current timetable
 The regulation is applied to the trains running in the normal traffic
direction in accordance with timetable
 Trains running in the reverse traffic direction are not regulated
 When the operator requests the Scheduled line-operating mode, the
ATS controls automatically
 – The cancellation of the cycles set
 – If necessary, the setting, in permanent mode of predetermined routes
 The change of mode will be effective, if the above automatic controls
are successful
 When the line-operating mode is switched from Scheduled to Manual,
permanent mode on routes is not cancelled automatically. This has to
be manually done by the operator if required.

30. Delay departure time
 Delay departure time is between the actual train delay
and the theoretical start time
 It is available in Scheduled and Constant Headway
modes
 No manual control is available
 Delay departure time value (Format - minutes:
seconds)

31. Dwell time
 Dwell time
– Time for a train to stop at a given platform
– Variable between the minimum and the maximum dwell times
 Maximal dwell time
– Upper limit duration to stop a regulated train i.e. 120 sec.
– Used by Automatic Train Regulation (ATR) function to reduce
advance of regulated trains
 Minimum dwell time i.e. 10 sec
– Lower limit duration to stop a regulated train
– Used by Automatic Train Regulation (ATR) function to reduce delay
of regulated trains
 Nominal dwell time i.e. 30 sec
– Time a train stops on a platform when it is not regulated or else if it
is on time
– Data preparation predefined value based on signalling application
studies

32. Maintenance Activity
A. Daily Maintenance
1.Monitoring of room temperature.
B. Monthly Maintenance
1. Restart of CATS and LATS.
2. Cleaning of workstations, servers, cubicles, FEPs, and
switching unit.
3. Adjustment of brightness and contrast setting in
workstations.
4. Inspection of cubicles, FEP and server fans.
5. Measure voltage level of input power supply.
6. Visual inspection of Ethernet switch, optical switch and
router and there cleaning.

33. Contd…
C. Six Monthly Maintenance
1 Through cleaning of workstations and cubicles and
ensure that cubicles are free from corrosion, dust dirt
and other foreign bodies.
2. Maintenance of workstations and VDU panels as per
procedure prescribe by manufacturer.
3. Replacement of air filter of cubicles.

34. Thank You