ELECTRIC TRACTION CONTROL SYSTEM ……when the collaboration is faster then the bureaucracy …… TECNAU Transport Division s.r.l Since 14th December 2002, a new technology, which reached their height with remote control system for electric traction the activation of the Bolzano IEMS (1989). (SCTE) has been in use in the Firenze - These systems employ a HW and SW Campo di Marte control station. Thanks to structure that is to a large extent proprietary close collaboration between RFI personnel (100% in some cases), which makes it and TECNAU technicians, it took only one difficult for them to be extended, maintained year to set up the system (actual time from or integrated (obsolete HW not available on specifications to activation). the market). Below we describe the scenario in which the The method of operation, by means of a new ET remote control station has been special keyboard, was revolutionary in the developed, together with its technical ‘80s but is too laborious nowadays; simple characteristics. activities, such as masking an alarm, sometimes Current become situation with demanding regard to operations that IEMS can be carried systems. out only from As already maintenance described in position. In the article by view of this, a Alvaro Fumi couple of years published in ago the FS the magazine embarked on a “La Tecnica policy of Professionale” replacing the in June 2002, systems, with the ET remote the ultimate control stations aim of having currently Fig. 1 – Control position of the SCTE system at RFI Firenze Campo di Marte only one ET operating on remote control the FS network fall into two groups: system, using cutting-edge technology, for Traditional (13) and Computer-operated (15). each division. We need not describe systems of the traditional type here, but we wish to specify Introduction to the SCTE system. that almost all the computer-operated systems The SCTE system was developed in order to currently in use are the outcome of the earliest allow peripheral locations on the Chiusi(e) – experiments in the field of information Attigliano(e) section of the Florence-Rome line LL(normal speed) and the Montallese(e) Concentrator and Alpha and between – Bassano(e) section of the Florence-Rome line Concentrator and peripherals. In designing the DD (high speed) to be included in the remote SCTE system, the standards recently specified control system, under the jurisdiction of the by RFI were taken into account. Compartimento di Firenze. The SCTE system is a personalized version of the basic SCADA HW architecture. The SCTE system consists product developed by TECNAU s.r.l. In the of a Control Station installed at Campo di case of the RFI Compartimento di Firenze, Marte, which handles all information to and the version supplied was the “SCTE Stand- from the Peripheral Cabins (TIC1000, of the alone”, which has no redundant apparatus Telettra type) by means of a Concentrator except communication links between located at Orvieto, in the premises of the SSE Firenze Campo di Marte Control Room PC – Pulpito di Comando Maintenance - PC Hub/Switch Alpha Modem ISDN Router PCM ISDN RFI Telecom Private Network Public Network Concentrator - PC Modem ISDN Router Orvieto SSE Normal Line High speed line S.S.E C.E S.S.E C.E. S.S.E S.S.E CIVITELLA ORVIETO SUD ORVIETO ORVIETO NORD ALLERONE C. D. PIEVE TIC 1000 TIC 1000 P TIC 1000 TIC 1000 P TIC 1000 TIC 1000 TIC 1000 D TIC 1000 D TIC 1000 TIC 1000 TIC 1000 TIC 1000 TIC 1000 TIC 1000 ALVIANO BASCHI S.S.E ALLERONA FABRO FICULLE ORVIETO Apparatus supplied by Tecnau Normal speed line Apparatus not supplied by Tecnau Normal Modem Line Backup Modem Line WAN – Wide Area Network (Extended Local Network) Fig. 2 – HW architecture of the SCTE system, Stand-alone version of the LL line. The use of TIC1000 cabins In the case of the extension of the Ethernet must not be considered as a design-driven network (manufactured and supplied by choice, but rather as a need felt by the TECNAU) from Firenze – Campo di Marte to customer, who wished to recycle as much Orvieto, a PCM channel belonging to RFI has functioning material as possible. been used as the primary line, while an ISDN Figure 2 shows the HW structure of the SCTE channel has been rented from the public system, Stand-alone version. operator, Telecom, as a backup line. In particular, the diagram shows: • control position consisting of commercial PC, 4 18” LCD monitors, mouse, keyboard. SW Architecture. The SW architecture of the • Alpha mainframe, distributed by the SCTE system is based on the Client/Server company HP. concept, which allows information to be • Maintenance workstation, consisting of processed at any node in the network; data commercial PC, monitor, mouse, can likewise be recorded at any other node. keyboard. This concept means that all resources, • Network printer. throughout the network, have been • Various network devices, e.g. rationalized and may be used in a practically Hub/Switching device, ISDN router, unlimited fashion. modem. This design gives the SCTE system a high degree of flexibility and modularity, for Client Level – Control Position Man Maschine Interface – MMI Process control Remote control Remote Menu Bar RCE Database Synchroniz. Management Monitoring RCE Management MBX-BRIDGE TCP/IP Remote control Remote Calculation of Privilege RCE Synchroniz. Management Monitoring State of Track Management Management and Feeder Process control Topographic Database Management of Peripheral Cabins Server Level – Alpha mainframe SCTE Firenze Campo di Marte Control Room Fig. 3 – SW architecture of the SCTE system, Stand-alone version example by allocating user processes to function is very useful during computers other than those used for data maintenance operations. processing. • Alarm and Signal Masking: makes it In this context, the need to modify possible to exclude an alarm or signal components or add new modules represents a from scansion. problem that can be solved immediately, from • Preventive lock: the operator is presented the point of view of both Hardware and with only those commands that are Software. In the SCTE system, the Server possible at that precise moment. processes are installed on the Alpha • User privilege management: access to mainframe, while Client processes take place the system is regulated by a procedure for on the Personal Computer of the Control entering User and Password; each Pulpit. operator has his/her own access code Figure 3 gives a functional diagram showing (User and Password), unique within the all the processes that make up the Control system. A certain profile is attached to Station of the SCTE system. each operator. The system can handle 4 Figure 3 shows that the Control Station has different types of profile: Administrator, various SW subsystems; for each subsystem ET Operator, Maintenance Operator, there is a Server block (sometimes consisting Trainee. of several programs) and a Client block. • Chronological event recording: all Arrows indicate how the various subsystems events intercepted by the system are relate to one another. The programming recorded in chronological order in a languages used, and indeed the very structure relational database. The application of of the programs, allow porting of the entire suitable filters helps the operator search Server level on state-of-the-art Personal for historic data. Computers. The functions for managing SMA apparatus Tasks carried out by SCTE. The SCTE (Scambio Moduli Automatico – Automatic system has the following functions: Module Exchange) and telemetry have not • Remote monitoring: supervision of plant been installed, because the peripheral cabins by means of several video terminals (TIC1000) do not support these applications. providing overall views (Synoptic Panel) and detailed views (Command Pages); Operational aspects. The SCTE system is • Remote control: possibility of remote extremely simple and intuitive to operate. control for all devices on the stretch of Elements or functions are selected with the track controlled; mouse; the keyboard is used only for access • Visualization of State of Feeders: to the system or to enter optional comments visualization in real time of the feeders concerning the events recorded. The operator (AT, MT, BT) in relation to the state of can choose how to allocate the video pages the devices; Forcing: possibility of (control pages, synoptic panel, window for simulating commands; handling events) among the 4 monitors. All • Countermarking: possibility of printouts requested by the operator are sent to countermarking a device (1-5 times) after the network printer. The system also handles a module has been released. In this way, acoustic signals associated with the activation the transmission of commands to a of an alarm or with the spontaneous variation countermarked device is prevented. of a device. The phases in the execution of a • Device Masking: makes it possible to remote command can be defined as follows: exclude a device from scansion; this • STEP1: select command page; out by the ET operator in the control position) • STEP2: select device to which a on events incepted by the SCTE system and command is to be sent; recorded in the relational database. • STEP3: select command on device; • STEP4: enter (or cancel to interrupt execution of command). Fig. 4 – Example of procedure to Unblock Countermarking The command is registered by the program Configuration of SCTE system. “Chronological Event Recording” and sent to The program EXCEL is used to compile a the peripheral. Figure 4 shows an example of number of spreadsheets, which constitute the the Unblock Countermarking procedure for configuration files for the SCTE system. device S12 at the Allerona Electric Substation The configuration files are processed (off cabin. line) by special programs, which create the database for the system. Maintenance Workstation. This consists of an operator workstation for the use of maintenance personnel, installed in the machine room. From this workstation, historical searches may be carried out (in exactly the same way as they can be carried Reliability. The reliability of the system is Conclusions. In conclusion, we can say that ensured by: collaboration between RFI personnel • The robust SW of the basic product, belonging to the Compartimento di Firenze SCADA, supplied by TECNAU s.r.l. (The and the technicians of TECNAU s.r.l. has led, product has been used by FNF Ferrovie in the space of a very short time, to the Nord Milano in a CTC configuration since development of an ET remote control system 1996 and by FCE Ferrovie Circum Etnea that is to the client’s utmost satisfaction. in a CTC configuration since 2001). • Precision of factory testing. • Use of top-quality materials. Remote maintenance. The apparatus constituting the Control Station of the SCTE system does not require ordinary maintenance; everything is entrusted to automatic SW procedures. All extraordinary maintenance activities resulting from unusual situations are described in the maintenance manual. In cases of extreme necessity the SCTE is connected via ISDN with the laboratory of TECNAU s.r.l. Advantages. The advantages deriving from use of the SCTE system are as follows: • Rapid installation and activation; • Easy configuration; • Robust HW and SW architecture; • Modular HW and SW architecture, giving the system great flexibility and Fig. 5 – Tecnau cabinet expandability; • Possibility of configuring the Server level, i.e. the Alpha mainframe, in Warm-standby mode; TECNAU Transport Division s.r.l • Possibility of including more than one Via F.lli Rosselli, 19 control position; 50055 Lastra a Signa (FI) Italy • Use of cutting-edge HW that is easily Tel. +39 055 8728222-3 Fax. +39 055 8975229 obtainable on the market; http://www.tecnau.it • Possibility of video display on the wall; • No ordinary maintenance required; • Easy integration with CTC or SCC systems (SCTE is designed to support the exchange of data with the CTC system supplied by TECNAU s.r.l.); • High degree of customer satisfaction.
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