EP0105182A2 - Decentralized interlocking device of routes in a route interlocking station - Google Patents

Abstract

1. A system for the decentralized setting of routes in a geographical interlocking station wherein the groups assigned to the individual route elements such as switches, signals and track sections (switch groups, signal groups, track groups) are equipped with control circuits which execute a control function in accordance with the setting function to be performed by the respective group and have geographical inputs and outputs connected to the control circuits of the respective adjacent groups in accordance with the geographical layout of the track system, characterized by the following features : a) groups usable as route end groups (entrance or exit groups), e.g. signal groups (S1,... S9) or track groups shown in the track plan as possible exit groups (Z1,..., Z3) which can form the beginning or end of a track route have control elements (pushbuttons) and/or command inputs which are permanently assigned to a direction of travel and via which the control circuits of the groups in question can be acted upon directly, b) operation of a control element of a route end group or a corresponding signal at any one of the command inputs of the route end group initiates the delivery to at least one adjacent group of a route-search data word (D1) typical of the direction of travel by the control circuit of the group, c) groups which have no control elements or command inputs or whose control elements are not operated on the one hand store a route-search data word received via a geographical input, together with an item of information marking this input, and on the other hand transfer the route-search data word to the adjacent groups through all outputs geographically opposite to this input, they execute a fixed setting programme if route-search data words from two route end groups have been received at oppositely directed inputs within a predetermined period of time beginning on reception of the route-search data word first received, d) route end groups execute a fixed setting programme if a control element is operated or a corresponding signal appears at a command input and a route-search data word has been received whose direction-of-travel type agrees with the direction of travel assigned to the control element or to the command input.

Description

The invention relates to a device according to the preamble of patent claim 1.

For setting routes in today's e.g. Track layout signaling systems in operation at the Deutsche Bundesbahn are used for so-called route search circles, geographic circuits, which are relayed between the two groups forming the start and end of the route to be set, the so-called start and target groups, from group to group using relay contacts and, after they have been switched through, the Mark the course of the route. In addition to the geographically arranged groups, a conventional track interlocking also requires centrally arranged groups, e.g. Monitoring or interface groups that perform central interface tasks.

In a track plan system described in DE-AS 29 09 512, from which the invention is based, the groups (element groups) are controlled by multi-computer systems. The computer systems are connected to each other according to the geographical structure of the GLeisanLage and fulfill predetermined group functions according to programs stored in read-only memories.

In accordance with the monitoring group in the conventional relay interlocking system, the known track plan interlocking system contains a central operating group for evaluation and safe monitoring of the operating device as well as a central route selection group. Central facilities generally have the disadvantage that malfunctions and failures in them always affect the entire control system and thus reduce its availability.

The object of the invention is therefore a device for the decentralized setting of routes in a lane switchboard equipped with electronically controlled groups. The device is described by the features of claim 1.

The device according to the invention avoids the use of central groups and the above-mentioned disadvantages. The operating elements of the table or the signals coming in via the command inputs of the route end groups have a direct effect on the control circuits of the route end groups and trigger the output of route search data words there, which are passed on from group to group according to the track plan. Since two controls are always used to manually control a route, there are initially two groups within it of the signal box, the sources of the same or at least related route search data words. The groups whose control elements form the route to be set always lie between the two sources and are distinguished by the fact that they receive two identical or related route search data words from geographically opposite directions. On the other hand, element groups lying outside the route receive the data words from the sources only from one direction. The control circuits of the groups, for example microcomputers or multi-computer systems, can thus determine whether their groups belong to the route to be set or not by evaluating the direction of origin of the route data data received. For switch groups, the directions of origin of the data words also indicate the required switch position, because the route must be set according to the position of the inputs via which the two data words are received. The direction of the train journey is communicated to the control circuits by a special form of the data word or by an additional character. For example, the two possible directions of travel can be identified by mutually non-equivalent forms of the same data word or by the same data words with a special direction bit. The evaluation of two identical or mutually equivalent data words additionally enables simple checking for falsification by comparison. Eventual component failures that lead to the change of a data word originating from one of the sources are thereby noticed. Controls can also Signals from a remote control device or a number control panel via command inputs permanently assigned to a direction of travel act on the control circuits of control groups forming the ends of a route and trigger the output of route search data words.

The route search data words of the route end groups (start or destination groups) can initially, as stated in claim 2, only be output in the direction of travel. The target group then receives a data word from the start group and outputs a second data word, which differs from the first, against the direction of travel to the start group. The second route search data word can also be output simultaneously with the output of the first route search data word.

It is also possible, as described in claim 3, to output only the first route search data word from both route end groups in all geographic directions. The data word must then contain a direction indicator so that the receiving route end group can determine from the direction indicator and the entry direction whether it is the start or target group.

Claims 4 and 5 relate to configurations of the switch groups. By evaluating the input direction of the route search data words, the set points and the directions in which the edge protection data words are to be output can be determined. On the other hand, it can be analyzed in more detail by directional evaluation Edge protection data words decide in a very simple manner whether and what type of edge protection positioning job should be carried out. Are points groups are present, which enable a Umfahrweg so that two various _- dene routes between the start and target group are adjustable, so the configuration is according to claim 6 a possibility again to exclude the Umfahrweg, so that only the desired control route is provided.

A further embodiment of the device according to the invention is described in claim 7 and relates to the inclusion of slip paths in the driveway. Claim 8 contains a very similar solution for the marking of middle turnouts.

Finally, claims 9 and 10 reflect possibilities of data word transmission between the groups. While the parallel transmission according to claim 9 has advantages with regard to the transmission speed, the serial transmission according to claim 10 offers above all the possibility of fail-safe transmission since the most varied of data protection measures can be used.

Embodiments of the invention according to claims 11 and 12 relate to self-adjusting operation and automatic train steering. Both automatic operation and train steering can be carried out easily and without the use of central groups with the device according to the invention.

The train number can also be reported via the control circuit of the control groups if, as described in claim 13, these are connected to the train number displays. This eliminates the need for a separate central train number registration location.

On the basis of a figure, an embodiment of the device according to the invention will now be described in detail and its function will be explained.

The figure shows a section of the layout of a railway system with the following typical arrangement cases. A signal S1 is the starting point for driveways from a route STR1. A point Z1 is the destination for routes on route STR2. SignaLe S2 ... S6 are the starting point of an exit road and the destination of an entrance road. An intermediate signal S7 is the starting point for a long drive, a destination for a short drive and an intermediate signal for long drives. Finally, two SignaLe S8 and S9 are the starting point for the driveways of routes STR3 and STR4. The routes STR3 and STR4 should, however, also be able to be driven in the opposite direction, so that the destinations Z2 and Z3 of exit roads via the routes STR3 and STR4 coincide with the signals S8 and S9.

The figure also shows switches W1 ... W14, of which the switches W6 ... W9 are central switches and at the same time represent a detour option. The turnouts W7 and W9 are then turn-around decision switches. All control units, such as switches, signals, GIle sections, start and end points, are assigned separate groups with up to four geographical entrances / exits, which are connected to their neighboring assemblies according to the geography of the GLIse system. Four geographical inputs / outputs are required, for example, for an intersection group or an intersection switch group, three for an ordinary turnout group and only two for a signal group or GLis group. In order to keep the variety of types of the control groups used in a signal box low, it can make sense to provide four geographical inputs / outputs for each group and, depending on the group type, to use two, three or all four inputs / outputs.

The inputs / outputs of a group can work in directional operation (separate connections for input and output) or in two-directional operation. In directional operation, the connecting lines have to be crossed similar to the trace cables in conventional relay signal boxes. In bi-directional operation, the inputs / outputs are in the basic position on reception and are only switched to output when information is to be provided.

Each group contains a control circuit, for example a microcomputer, which evaluates information received via the geographic inputs of the group and can output information about the outputs of the group depending on it and depending on a permanently stored control program. Each incoming information is provided with a feature that identifies the input via which the information reached the group and is stored for a certain time.

Groups, which can be the start or end point of a route (route end point), are connected with buttons in the table. Each button is permanently assigned to a certain direction of travel and labeled accordingly. It has a direct effect on the control circuit of the group assigned to it and triggers the output of a first data word D1, a route search data word, which is fed, for example, to the neighboring group lying in the direction of travel. It saves it and passes it on to the opposite exit according to the SpurpLan or, if the switch group is addressed from the top, to the two opposite exits. If no key is pressed, the start or target group, like any other route group, picks up a route search data word pending at one of its geographical inputs, stores it in relation to the input, and sends it to the neighboring group connected there via the output opposite the input. However, if a key is pressed, firstly, as described above, a route search data word D1 is output, secondly, each route search data word arriving via a geographic input is compared with the data word D1 output from ^q e and if it is determined that both data words match each other, the stored Control program processed. If the route search data word D1 is only output in the direction of travel, this also includes the output of a matching second route search data word D2 opposite to the direction of travel.

Switch groups cannot be start or target groups. You receive route search data words at a geographic input, save them as described above, input-related and give them to the opposite output or if the input at which the data word is assigned to the turnout tip is assigned to the two opposite ones outputs assigned to diverging switch lines. The setting program of a switch group, like any other control group between the start and target group (signal group, track group), is only processed when two matching or matching route search data words from opposite directions have been received and saved. The switch groups can also find the switch position to be set from the position of the group inputs used, because the route marked by the incoming route search data words corresponds to the route to be set. The signal groups recognize the direction of travel to be set along the route from the type or the direction indicator of the route search data words. As a result, you can prepare the travel position of intermediate signals or mark it as a counter signal.

The data words can be transferred in parallel between the individual groups. This solution is very advantageous when using microprocessors, since the corresponding ports of the microprocessors simply have to be connected to one another. Basically, it is also possible to transfer the data words serially. This has the advantage that the data can be better protected against interference by code security measures. However, the transmission of the data words then takes more time, which significantly increases the duration of the setting process.

The two route search data words output by the route end groups (start and destination group) and passed on by the neighboring groups serve only to find a possible route. They can be delivered at the same time or one after the other. In the latter case, both route end groups first output the first data word D1 at their exit in the direction of travel. When the first data word is received, the target group responds by outputting the second data word D2 at its output opposite to the direction of travel. This has the advantage, among other things, that when the data word D2 is transmitted, the transmission path is already known due to the transmission of the data word D1, and deviating paths that do not lead to the starting point can be blocked. In order to enable the groups to determine the direction of travel, the two data words must differ from each other, but still be recognizable as belonging together. In principle, it is also possible to output only one data word at both route end groups, and this at the same time in all geographical directions. The data word must then contain information about the direction of travel.

In addition to the route search data words used to find a route, there are a whole series of further commands and messages in a signal box equipped with the subject matter of the invention, which are output or received in the form of other data words and which also trigger actuation actions or secure actuation actions that have already taken place.

Such other data words are e.g. exchanged between target groups and subsequent slip path groups or between switch groups and neighboring switch groups not lying in the driveway for the purpose of flank protection. There are also special data words to ensure the setting of middle turnouts.

• Es soLL z.B. in der Figur eine Einfahrstraße vom Signal S9 zum SignaL S2 gesteLLt werden. Hierzu wird die dem SignaL S9 zugeordnete Taste und die dem SignaL S2 zugeordnete Taste betätigt. Die SignaLgruppen S9 und S2 geben daraufhin Fahrwegsuch-Datenworte D1 an die in Fahrtrichtung Liegenden Nachbargruppen, die Weichengruppen W11 und W3 aus. Die Weichengruppe W11, die das Datenwort D1 über einen ihrem Linken Strang zugeordneten Eingang zugeführt bekommt, speichert das Datenwort einerseits und gibt es andererseits über ihren der Weichenspitze zugeordneten Ausgang an die Weichengruppe W12 weiter. Die Weichengruppe W12 speichert das ankommende Datenwort ebenfalls und gibt es gleichermaßen entlang beider Weichenstränge weiter. Im Linken Strang erreicht das Datenwort jetzt die SignaLgruppe S5. Diese speichert das Datenwort und ermittelt die vorgesehene Fahrtrichtung. Letztere geht aus dem Datenworttyp (D1) und der Lage des Eingangs (am Kopf der SignaLgruppe) eindeutig hervor. AnschLießend erfolgt die übertragung auf die Weichengruppe W9. EntLang dem rechten Strang der Weiche W9 gelangt das Datenwort zur Weichengruppe W7 und anschliessend zur Zielgruppe S2. Da in der ZieLgruppe eine Taste betätigt ist, wird das Datenwort D1 nicht weitergegeben, sondern LedigLich auf Richtigkeit überprüft und abgespeichert. AnschLießend wird die SignaLgruppe S2 als ZieLgruppe markiert und ein Fahrwegsuch-Datenwort D2 in Gegenrichtung ausgegeben. Dieses gelangt zunächst zur Weichengruppe W7, dann entlang deren Linkem Strang zur Weichengruppe W9, zur Signalgruppe S5 und über die Weichengruppen W12 und W11 zum Startpunkt, der SignaLgruppe S9, wo es zur Markierung der SignaLgruppe als Startgruppe ausgewertet wird. Das Datenwort D1, bei gleichzeitiger Ausgabe beider Datenworte auch das Datenwort D2, werden nicht nur über diesen direkten Weg der jeweils gegenüberliegenden Start- bzw. ZieLgruppe zugeführt. Die Datenworte gelangen auch über die von der Fahrstraße abzweigenden Stränge der Weichen (W12 und W9 für Datenwort D1, W7 und W11 für Datenwort D2) auf Spurverbindungen, die nicht zum ZieLpunkt bzw. Startpunkt führen. Sie pflanzen sich dort bis zum Ende des SteLLbereichs fort, bleiben aber ohne jede Wirkung. Sie werden zwar in den einzelnen SteLLgruppen abgespeichert, aber, wenn kein zweites, passendes Datenwort aus der Gegenrichtung eintrifft, nach einer gewissen Zeit gelöscht. Eine Ausnahme bilden die in der Weichengruppe W9 entlang dem Linken Strang und in der Weichengruppe W7 entlang dem rechten Strang abgegebenen Datenworte. Diese können über die Weichengruppen W6 und W8 wieder zum gegenüberLiegenden ZieL- bzw. Startpunkt gelangen. In diesem Fall sind zwei verschiedene Fahrstraßen möglich und es muß eine Auswahl getroffen werden. Dies kann z.B. durch eine Umfahrausschlußinformation geschehen, die dem Datenwort, das nicht entlang dem gewünschten RegeLweg ausgegeben wird, hinzugefügt wird. Umfahrausschlußweichengruppen wie z.B. W7 oder W9 können dann so programmiert werden, daß sie durch eine UmfahrausschLußinformation gekennzeichnete Datenworte nicht verarbeiten. Ein über die Weichengruppe W8 zur Weichengruppe W9 übermitteltes Datenwort (D2 + UmfahrausschLußinformation) kann dadurch nicht mehr zur Signalgruppe S5 und zum Startpunkt gelangen.

How the individual control groups forming the route to be set up work with each other and with the groups adjoining the route to trigger the setting process can be most easily demonstrated using a concrete example:

• In the figure, for example, an access road from signal S9 to signal S2 should be set. For this, the Key assigned to SignaL S9 and key assigned to SignaL S2. The signal groups S9 and S2 then output route search data words D1 to the neighboring groups lying in the direction of travel, the switch groups W11 and W3. The turnout group W11, which receives the data word D1 via an input assigned to its left strand, stores the data word on the one hand and, on the other hand, passes it on to the turnout group W12 via its output assigned to the turnout tip. The turnout group W12 also stores the incoming data word and passes it on equally along both turnout lines. In the left strand, the data word now reaches signal group S5. This stores the data word and determines the intended direction of travel. The latter is clear from the data word type (D1) and the position of the input (at the head of the signal group). The transfer to switch group W9 then takes place. Along the right strand of the turnout W9, the data word reaches the turnout group W7 and then the target group S2. Since a key is pressed in the target group, data word D1 is not passed on, but only checked for correctness and saved. The signal group S2 is then marked as a target group and a route search data word D2 is output in the opposite direction. This first reaches switch group W7, then along its left strand to switch group W9, to signal group S5 and via switch groups W12 and W11 to the starting point, SignaLgruppe S9, where it is evaluated to mark the SignaLgruppe as a starting group. The data word D1, at simultaneous output of both data words and data word D2 are not only fed to the opposite start or target group via this direct path. The data words also reach the track connections via the branches of the switches branching off the route (W12 and W9 for data word D1, W7 and W11 for data word D2), which do not lead to the destination or starting point. They reproduce there until the end of the control area, but remain without any effect. Although they are saved in the individual control groups, if a second suitable data word does not arrive from the opposite direction, they are deleted after a certain time. The data words given in the switch group W9 along the left strand and in the switch group W7 along the right strand are an exception. These can get back to the opposite target or starting point via the switch groups W6 and W8. In this case, two different routes are possible and a selection must be made. This can be done, for example, by bypass exclusion information that is added to the data word that is not output along the desired control path. Detour exclusion switch groups such as W7 or W9 can then be programmed so that they do not process data words identified by detour exclusion information. A data word (D2 + bypass exclusion information) transmitted to the switch group W9 via the switch group W8 can therefore no longer reach the signal group S5 and the starting point.

If a data word D1 or D2 reaches a target point or starting point whose target key or start key is pressed, the program stored in the target group or starting group is started. In the case of a target group, this initially consists in marking the target point and outputting the data word D2. In the event that the target point is an exit signal, a slip-through data word D3 is then output in the direction of the end of the slip-through. The slipping path group addressed by data word D3 or a correspondingly programmed switch group responds with a special data word D6. If several slip-through ends are possible, several slip-through data words D31 ... D3n are output and reflected as data word D61 ... D6n by the respectively programmed slip-through end. The program of a start group initially only includes marking the group as a start group.

The switch groups located between the starting point and the destination store the data words D1 and D2 from the input. If both data words are available, they are checked for belonging together. If the result is positive, it is also checked whether the two data words have also been received via mutually opposite inputs. If this is the case, the turnout position to be set is determined from the position of these inputs and the setting process is prepared. A data word D4 is then output along the line rejecting the route, which triggers flank protection measures in neighboring switch groups.

Signal groups located between the starting point and the destination point also check the incoming data words. If they belong together, depending on the direction of the input of data word D1, the travel position is prepared as an intermediate signal, or it is marked as a counter signal.

Just as the switch groups located in the route to be outputting data words D4 for flank protection to neighboring switch groups, they must also be able to provide flank protection if other routes are set. The turnout groups therefore react to incoming data words of type D4 with edge protection positioning orders. If the data word arrives along the plus line of the turnout, the actuating job takes place according to the minus position. If the data word arrives along the negative line of the turnout, the actuating job takes place according to the PLus position. If the data word arrives from the turnout tip, it is passed on to the next turnout groups.

If the middle turnouts are to be included in a route to be set, as would be the case with the turnouts W7 and W9 in the system shown in the figure, if an exit road should be set from the signal S2 towards the target group Z1, the middle turnouts must depend on their occupation status are checked and marked. The start group, eg group S2, sends a data word D5 against the direction of travel. If track groups are reported to be busy (eg group S5), this leads to the output of a response data word D7 in Direction of the starting group. In between, switch groups behave when data words D5 and D7 are present at opposite inputs, just as when data words D1 and D2 are present. The points are marked and data telegrams D4 are output in the direction of the edge protection. In non-occupied track groups, neither the data word D5 is passed on nor the data word D7 is output.

If a speed concept is to be formed, this can be done by means of a data word which is output by the target group and is compared in each route group with the permissible maximum speed stored there. The speed term contained in the data word can be corrected to a lower value in each group if the associated guideway element requires a lower permitted maximum speed. The data word received by the start group then contains the lowest permissible maximum speed in each case.

If the setting of routes is to be carried out in self-service mode, the route end groups intended for self-service mode must be enabled to output a second route search data word against the direction of travel even when a first route search data word arrives, if no operating element is actuated or no corresponding signal pending at a command input. This can be done can be achieved without a security risk by programming the relevant groups as SELF-ACTIVITY-TARGET groups, i.e. enabling them to search for route search data words that contain a special self-service mode indicator, even without the operation of an operating element or a corresponding signal at a command input by the second route search Answer data word. For example, the train number of the train that is to be the next to travel on the route can serve as a self-parking indicator.

If the self-service target groups or other route end groups are connected to train number display devices, the entire train number report can be processed. In this case, the train numbers are passed on like other data words along the route, saved in the respective target group and made visible on the display device connected to the target group.

If several adjoining routes can be set from one route end group, train routing can be carried out by assigning special self-service operation indicators to each individual SELF-OPERATION-GOAL group. Each self-service target group then responds only to route search data words provided with their identifier (eg a train number). The setting of a subsequent route can also be made dependent on the train number, time and schedule data or the station schedule, in addition to the train number. The departure time and the route destination (bypass, overhauls, other station track) can be changed manually or by a higher-level planning computer. Priorities for individual trains can also be granted, for example by appropriate coding of the train numbers used as self-service license plates.

Claims (13)

1.Device for the decentralized setting of routes in a track interlocking system, in which the groups assigned to the individual route elements are equipped with control circuits that execute a control program designed according to the relevant control function of the respective group and have geographic inputs and outputs that correspond to the geographic structure the GLeisanLage are connected to the control circuits of the neighboring groups, characterized by the following features: a) Groups that can be used as route end groups (start or target groups) (S 1 ... 9, Z1 ... 3) have control elements (buttons) and / or command inputs that are permanently assigned to a direction of travel and via which the control circuits of the Groups can be directly affected. b) Actuation of an operating element of a route end group or a corresponding signal at one of its command inputs Triggers the delivery of a route search data word (D1) typical of the direction of travel to at least one neighboring group. c) Groups which have no control elements or command inputs or whose control elements are not actuated store a route search data word received via a geographical input on the one hand together with information identifying this input and on the other hand give the route search data word via all outputs that are geographically opposite to this input to the neighboring groups. They execute a predefined control program if route search data words from two route end groups have been received at mutually opposite inputs within a predetermined period of time. d) Route end groups execute a specified control program if an operating element is actuated or a corresponding signal is pending at a command input and a route search data word has been received, the direction of which corresponds to the direction of travel assigned to the operating element or the command input. 2. Device according to claim 1, characterized in that when actuating an operating element of a route end group or when a corresponding signal is pending at one of its command inputs in addition to a first route search data word which is output via the geographical output of the group located in the direction of travel, a second , Data word (D2) different from the first route search data word is output at the geographic exit located opposite the direction of travel. 3. Device according to claim 1, characterized in that the route search data words given by all route end groups are the same for the same direction of travel given by the operating elements or by the command inputs used and are given in all geographical directions. 4. Device according to one of the preceding claims, characterized in that switch groups (W1 ... W14) determine the switch position to be set according to the route by evaluating the geographical position of the inputs via which the route search data words were received. 5. Device according to claim 4, characterized in that the switch groups give flank protection data words (D4) via their geographic exit leading away from the route as soon as they have received route search data words from the two route end groups and that they evaluate received flank protection data words in a direction-related manner and, depending on this, carry out a necessary edge protection task and / or pass on the edge protection data words to the neighboring groups. 6. Device according to claim 4 or claim 5, characterized in that switch groups (W7, W9), which can provide a detour, the route search data words they issue along the detour to exclude the detour with a special identifier provided and do not record incoming route search data words via an input assigned to the bypass route which are provided with the special identifier. 7. Device according to one of the preceding claims, characterized in that identified as target groups route end groups slip path data words (D3) in the direction of all possible slip path ends and mark a slip path if from a programmed track group, e.g. a switch group, a feedback data word (D6) has been received. 8. Device according to one of the preceding claims, characterized in that a route end group recognized as a start group outputs a middle turn data word (D5) against the direction of travel, that occupied reported ice groups output a middle turn feedback word (D7) in the direction of travel and that a middle turn group (W7 , W9) marks its turnout position as a middle turnout position when it has received a middle turnout data word and a middle turnout feedback word via two opposing geographic inputs. 9. Device according to one of the preceding claims, characterized in that the control circuits of the groups of microcomputers are formed and that the geographical connections of the groups are formed by parallel buses of the microcomputers. 10. Device according to one of claims 1 to 8, characterized in that the control circuits of the groups of microcomputers are formed and have interfaces corresponding to the geographic outputs of the respective groups, which enable serial connections to the neighboring groups. 11. Device according to one of the preceding claims, characterized in that for setting a route in self-service mode, the first route search data word is triggered via the command input assigned to the direction of travel of the start group of the route and is output by the start group with a special self-service indicator in the direction of travel will be that certain groups that can be used as route end groups are programmed as self-service target groups and output the second route search data word against the direction of travel without actuating an operating element or pending a signal at a command input when a first data word provided with self-service mode indicator has been received. 12. The device according to claim 11, characterized in that in the presence of several alternative self-targeting groups to be reached, route search data words with individual, different self-adjusting target groups assigned to the individual self-adjusting target groups can be output by the start group, and that only one provided with the assigned identifier first route search data word leads to the output of a second route search data manager by a self-service target group. 13. Device according to one of the preceding claims, characterized in that the control circuits of all or a part of the aLs route end groups usable groups are connected to train number display devices and train numbers which are passed on from group to group and in the target group by means of special train number data words corresponding to the set route transmitted to the train number display devices.

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