EP1908221A1 - Procede et dispositif de configuration automatique d'un systeme de bus de terrain maitre-esclave - Google Patents

Procede et dispositif de configuration automatique d'un systeme de bus de terrain maitre-esclave

Info

Publication number
EP1908221A1
EP1908221A1 EP06764223A EP06764223A EP1908221A1 EP 1908221 A1 EP1908221 A1 EP 1908221A1 EP 06764223 A EP06764223 A EP 06764223A EP 06764223 A EP06764223 A EP 06764223A EP 1908221 A1 EP1908221 A1 EP 1908221A1
Authority
EP
European Patent Office
Prior art keywords
bus
address
subscriber
cond
condition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06764223A
Other languages
German (de)
English (en)
Inventor
Siegfried Haas
Alexander SCHÖNTGES
Roland Ziegler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aumovio Germany GmbH
Original Assignee
VDO Automotive AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by VDO Automotive AG filed Critical VDO Automotive AG
Publication of EP1908221A1 publication Critical patent/EP1908221A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/403—Bus networks with centralised control, e.g. polling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40208—Bus networks characterized by the use of a particular bus standard
    • H04L2012/40234—Local Interconnect Network LIN
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/4026—Bus for use in automation systems

Definitions

  • the invention relates to a method and an arrangement for the automatic configuration of a fieldbus system, in particular ⁇ re a LIN bus system, with a master and at least one bus subscriber.
  • Fieldbus systems are used in particular in industrial preparation ⁇ chen, such as automation equipment, instrumentation and robotics its application, however, and in the networking of control units, sensors, actuators and input and Ausgabemit- stuffs increasingly in vehicles, such as motor vehicles, aircraft and vessels, used , Due to their areas of application therefore high Anforde ⁇ are insurance companies concerning service robustness, manageability and maintainability placed on the field buses.
  • the master In operating according to the master-slave principle fieldbus system initiated and the master coordinates any communi cation ⁇ and the or the bus users, so the slaves respond.
  • the bus subscriber In order for the master to specifically address the at least one bus subscriber connected to the field bus, ie to be able to address it, the bus subscriber must be assigned a unique address or identification number that can not be confused with any other bus subscriber and made known to the master. This can be done before the commissioning of the fieldbus system by identifying all available bus participants via configuration files and assigning a unique subscriber address to each bus subscriber. The information from the configuration files are stored in a memory of the master, so that this already knows after a restart of the bus system, the subscriber addresses and can communicate with the bus participants.
  • the bus system is configured offline.
  • avail ⁇ as alternate end information on the bus stations it is not possible, generiche- new bus user in the bus system without adjusting the configuration information and to program the Master.
  • this requires the involvement of a person skilled in the art, which makes the use of a sol ⁇ chen bus system inflexible and increases the cost of system ⁇ changes.
  • a fieldbus system which is configured with the described procedure is the LIN bus, which is used in particular in the automotive sector.
  • the LIN bus is in this case less than linkage to crosslink the entire vehicle for locking and Summary of subunits used to subsystems, such as display units in Be ⁇ area of the instrument cluster or in sensor and actuator elements in the door or roof area.
  • a change in the number of bus subscribers always means a visit to a workshop for the vehicle owner, which makes the retrofitting of the desired accessories expensive.
  • the object of the present invention is to specify a method and an arrangement of the type mentioned at the beginning, with which at least one new bus subscriber can be added to the fieldbus system, without the master having known this at least one bus subscriber in advance.
  • the master notes the bus subscribers currently present in the fieldbus system and stores them as known bus subscribers.
  • the master is further configured programmatically so that after a restart of the field bus system, which is now comprised of the master and the min ⁇ least one bus subscriber, the following procedural assigning a standard address as a subscriber address to the at least one bus subscriber, checking whether the at least one bus subscriber belongs to the known configuration, and, if this is the case, assigning a unique subscriber address to the at least one bus subscriber. whether the at least one bus subscriber still has the standard address and so far ⁇ this is the case, identification of the at least one bus subscriber and assigning a unique therapeuticad- ress at least one bus subscriber.
  • the at least one bus subscriber is designed so that he can implement the messages of the master to change the subscriber address and respond to requests that serve to check the currently assigned ⁇ nen address or query information to identify the respective bus can.
  • Participant addresses which he would have actually received from the configuration information, not known in advance. Only then can the master communicate with the bus participants. By means of one or more identification requests to the bus subscriber or subscribers, it is checked whether and which of the bus subscribers is already known to the master. The well-known bus users are then allocated its own eindeu ⁇ term subscriber address by the master and, if necessary, all other steps for complete configuration of the respective bus subscriber to be made. At the end of the
  • the method according to the invention is preferably carried out stepwise for all bus subscribers present in the fieldbus system, that is to say that each of the steps 1 to 5 is executed first for all bus subscribers before proceeding to the next step.
  • steps 1 to 5 can also be run through one after the other for each bus subscriber individually.
  • At least one request to be answered in binary form is sent to the at least one bus subscriber in order to carry out steps 1 to 5.
  • Binary answer under a request because ⁇ understood by a request that can only be answered with YES or NO or TRUE or FALSE.
  • the Bus subscribers either were able to send both answer types , ie depending on the situation either the positive or the negative answer, or he can only send one of the two types of response and leaves the request unanswered if the opposite answer, which entspre ⁇ is interpreted as an opposite answer.
  • Child node associated with the node belonging to the request If there is no child node, then a leaf has been reached and thus a bus participant has been uniquely identified. In this Wei ⁇ se is possible from the familiar bus users overall are examined as well be made to identify the new bus users.
  • the ability to send a message that leads only in exactly the bus subscriber to change its station address, the one or more transmitted with this message conditions he ⁇ crowded. If a bus subscriber has subsequently changed his subscriber address , he sends out a positive answer.
  • a ne gative ⁇ response is not simple and is interpreted as domestic by the master that no device in the bus system is available which meets the one or more conditions.
  • LIN bus standard may be the To ⁇ affiliation of the bus subscriber to a particular manufacturer and / or to a certain type of function such a condition, that is, it is determined whether the bus subscriber in his ID Case ⁇ onsmerkmalen a particular manufacturer number, and / or has a specific function number.
  • an address change request is sent in step 1 to the at least one bus subscriber, with which the standard address is discharged as new subscriber address over ⁇ and whose condition is always fulfilled by the at least one bus subscriber.
  • the condition is so choose so- ⁇ that all ⁇ Gurss working bus devices present in the fieldbus system and tendonssge meet this necessarily so that the default address is also safe adopted by all bus users.
  • At least one bus subscriber request is sent with the unique therapeuticad ⁇ ress is transmitted as new subscriber address and the condition of which the association of the at least one Busteilneh ⁇ mers to a manufacturer and / or a function type according to the known configuration.
  • Steps 2 and 3 are processed with a single message sent by the master.
  • an address change request is ver ⁇ sends in step 4 to the Any artwork least one bus subscriber, whose condition is the presence of the standard address. This preferably takes place in that the address change tion request to bus subscribers with the default address address ⁇ Siert, so that only the one or more bus users respond to the request positive, which still have the default address. Bus subscribers to whom an own subscriber address has already been assigned, and who therefore belong to the known configuration, are not reached by the address change request. With the address change request the service address can be used as new subscriber address again be averaged over ⁇ , that is, it is simply overwritten with itself, or it will transmit a changed unit address.
  • step 5 in a further refinement, an address change request is sent to the at least one bus subscriber whose condition is the affiliation of the at least one bus subscriber to a manufacturer that is possible in the bus system and / or to a possible function type in the bus system.
  • the master must be aware of all bus device types with their manufacturer and function numbers, which can occur in the fieldbus system.
  • the bus subscribers recognized as new by the presence of the standard address after the end of step 3 are now queried for their affiliation with one of the fundamentally possible manufacturers and / or function types.
  • an identification address is the address verses det ⁇ identifying the positive responding bus subscriber as to a particular manufacturer and / or type of function associated with, or, in the case that the request leads to a positive identification , transmit a unique subscriber address. If the identification takes place via an identification address, the unique subscriber address is only transmitted to the bus subscriber after a clear assignment of the new bus subscriber to a manufacturer and a function type.
  • FIG. 1 shows the message structure of an address change request
  • FIG. 2 shows the message structure of a response to the request from FIG. 1;
  • FIG. 4 shows the message structure of a response to the request from FIG. 3;
  • FIG. 5 shows a LIN fieldbus system
  • FIG. 6 shows a binary tree with the bus subscribers of the LIN fieldbus system
  • FIG. 8 Functional sequence of steps 4 and 5.
  • an address change request represents ⁇ that is sent from the master to a slave address field 1 of its part ⁇ specified bus user and is transmitted to the panel 3 in a condition.
  • the structure of the message corresponds to the LIN bus standard version 2.0, wherein the content of the individual fields is simplified Darge ⁇ represents is.
  • box 2 of the type of message accurately de ⁇ is finiert.
  • the type "request" illustrates ⁇ the.
  • Field 4 is the Change address request included with the to be transmitted new subscriber address, which of the specified in field 1 bus users is assumed, provided that the condition of the field is met.
  • the bus user answers with a response message directed to the master in accordance with the invention.
  • gur 2 The response message in box 5 the address of the responding bus subscriber, in box 6, the message type, in this case of the type "response" and in Sections 7 and 8 are provided ⁇ added dummy values included, so for example all bits set to 1 .
  • sending the reply message rea ⁇ the bus user alternates to the address change request po ⁇ sitive and inform the master with that he has taken on the new node address. Failure to reply to the master, it is understood as a negative response.
  • FIG. 3 shows the schematic structure of an address change request in accordance with the LIN bus Standard 2.0, with the condition as the membership of the bus subscriber to be a ⁇ voted manufacturer (box 9) as well as type-tion to a certain radio (field 10 ) is transmitted.
  • the positive answer to this request according to FIG. 4 corresponds to the answer from FIG. 1, that is to say the fields 9 and 10 with the condition (s) and the field 4 with the new participant address are replaced by dummy values.
  • FIG. 5 shows an example of a LIN bus system in a vehicle, for example a motor vehicle or a sports boat, with an instrument cluster as master 14 and a total of eight pointer instruments as bus subscribers 15 (slaves). About the LIN bus 16, the master 14 and the bus ⁇ participants 15 are connected to each other in a star shape.
  • the eight bus subscribers 15 can be assigned to the leaves 17 of a binary tree as shown in FIG. 6, since each pointer instrument can be unambiguously assigned to one of two manufacturers H 1 and H 2 as well as one of four functional groups F 1 to F 4. Under function group as for example the type of instrument by the pointer is placed ⁇ ⁇ size since understood, so for examplehuige- speed, level-engine temperature, engine speed and fuel ⁇ .
  • the tree starts from a root 18 and divides at this root into a right and left subtree, depending on the manufacturer Hl or H2.
  • the two sub-trees each begin at a node 19 and subdivide again into two sub-trees, depending on the function type Fl or F3 or F2 or F4, which leads to the node 20.
  • the bus member ⁇ added with participants H1F2 and H2F3 as a new bus participant.
  • the master 14 has noted the configuration consisting of the other six bus participants as a known configuration, that is, he has at least to ⁇ lays in a memory ⁇ that the manufacturer Hl the function groups Fl, F3 and F4 are present and from the manufacturer H2, the function groups Fl, F2, and F4.
  • step 0 of the method for configuration is already executed and a restart can take place.
  • Main step 1 includes sub-steps 101 to 103, wherein in step 101 the master 14 sends the address change request Cond_Addr_Chg having the content of FIG.
  • the bus subscriber address used is a so-called broadcast address with which all bus subscribers 15 present in the bus system are addressed. As a new subscriber address the standard ⁇ address is passed and the condition is set from the outset "true" to the value, that is, the condition is always met.
  • step 102 the master checks whether a response has been sent at least one bus user 15th If this is not the case, then no bus subscribers 15 are connected to the LIN bus and the configuration is thus terminated (step 103) If there is at least one answer, the process continues to main step 2, which has sub-steps 202 and 203
  • the known configuration is loaded in step 202, ie the master fetches from the memory a list of the bus subscribers present before the restart with the associated identification features manufacturer and function. ontype and starts with the first list entry.
  • step 202 it checks if the first list entry is already empty. If this is the case, no bus subscribers 15 were present before the restart, that is, all bus subscribers 15 in the bus system are new and are treated further with steps 4 and 5. These steps are changed over the kausstel ⁇ le A.
  • an address change request according to FIG. 3 is sent to the bus subscriber 15 entered there.
  • This request is thus addressed to only one bus user with the address "SlvAddr” and it contains the condition that the receiver originates from the manufacturer "MSlv” and is of the function type "FSlv” .At the same time, a unique subscriber address "SpecAddr” is transmitted. If the bus user answers in a positive way, it was firstly recognized which bus subscriber from the known configuration is still present in the bus system, and, moreover, this bus subscriber has already been assigned a unique subscriber address, that is to say step 203 also carries out the main step 3 at the same time.
  • step 204 the further initialization of the bus subscriber can take place in step 205. If no reply has been sent back, the addressed bus subscriber is no longer present in the bus system and it can be deleted from the known configuration in step 206.
  • step 207 the system moves to the next list entry and proceeds to step 202, that is, it is checked whether the list entry is empty. The loop will run as long through, until the end of the list of the known Configurati ⁇ on achieved, that is until an empty list item he ⁇ enough is.
  • the six known bus subscribers 15 (HlF1, H1F3, H1F4, H2F1, H2F2 and H2F4) are then initialized at this point.
  • Step 4 with sub-steps 401 to 403 is ge ⁇ checks whether bus devices are available with the default address. For this purpose, an address change request is sent to the standard address according to FIG. 1, at which the condition is again set to "true.” With the request, the default address is sent again as the new subscriber address determines the at least one bus ⁇ with the standard address and a new bus users are present. If there is no new bus node, ie remains of the answer, the configuration of the bus system is terminated (step 403).
  • step 501 at which the main step 5 starts, an address change request is sent to the standard address according to figure 3, in which the condition is set to the manufacturer number Hl and the function number F2.
  • the unique node address "HlF2Addr" As a new subscriber address the unique node address "HlF2Addr" with transmitted. If a response, a new bus device manufacturer St. and the function type F2 was successfully identified and this has a unique user address simultaneously.
  • the new Busteilneh ⁇ mer H1F2 in step 503 initialized and entered in the list of the known configuration "Config". Now, the master 14 again checks if there are still bus subscribers with the default address (steps 504, 505, 506). If this is the case, it is checked then even the last possible Her ⁇ manufacturers and function type. If the remaining new bus participant is from the manufacturer H2 and from the function type F3 (steps 507 and 508), then it is assigned the unique subscriber address "H2F3Addr" and it becomes in step
  • the master can not proceed as linearly as in FIG. 8 in particular for reasons of the calculation time. Then he shimmies along in the binary tree, for example by first checking whether one of the new bus subscribers belongs to the manufacturer Hl. This happens again via an address change request. If he does not receive a positive answer, the master stores a note that at the left node 19 and thus to the manufacturer Hl no new bus subscriber is present. The query now continues at the right subnode 20 with the address change request with regard to the function types Fl and F3 or F2 and F4. For larger binary trees, this stepwise approach within the binary tree simplifies the identification of the new bus subscribers.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

La présente invention concerne un système de bus de terrain (16), notamment un système de bus LIN, qui présente un maître (14) et au moins un utilisateur de bus (15). Selon cette invention, une configuration automatique du système de bus est effectuée en ce que le maître (14) enregistre la configuration actuelle du système de bus de terrain (16) en tant que configuration connue et, après un redémarrage du système de bus, une adresse standard est attribuée comme adresse d'utilisateur à l'utilisateur de bus (15), il est vérifié si l'utilisateur de bus (15) appartient à la configuration connue et, si tel est le cas, une adresse d'utilisateur unique est attribuée à l'utilisateur de bus (15), il est vérifié si l'utilisateur de bus (15) présente encore l'adresse standard et, si tel est le cas, l'utilisateur de bus est identifié, puis une adresse d'utilisateur unique est attribuée à l'utilisateur de bus.
EP06764223A 2005-07-22 2006-07-19 Procede et dispositif de configuration automatique d'un systeme de bus de terrain maitre-esclave Withdrawn EP1908221A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005034944A DE102005034944B3 (de) 2005-07-22 2005-07-22 Verfahren und Anordnung zur automatischen Konfiguration eines Master-Slave-Feldbussystems
PCT/EP2006/064422 WO2007010008A1 (fr) 2005-07-22 2006-07-19 Procede et dispositif de configuration automatique d'un systeme de bus de terrain maitre-esclave

Publications (1)

Publication Number Publication Date
EP1908221A1 true EP1908221A1 (fr) 2008-04-09

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ID=36997692

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Application Number Title Priority Date Filing Date
EP06764223A Withdrawn EP1908221A1 (fr) 2005-07-22 2006-07-19 Procede et dispositif de configuration automatique d'un systeme de bus de terrain maitre-esclave

Country Status (5)

Country Link
US (1) US20090125656A1 (fr)
EP (1) EP1908221A1 (fr)
BR (1) BRPI0612906A2 (fr)
DE (1) DE102005034944B3 (fr)
WO (1) WO2007010008A1 (fr)

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Also Published As

Publication number Publication date
US20090125656A1 (en) 2009-05-14
DE102005034944B3 (de) 2006-11-09
BRPI0612906A2 (pt) 2010-12-07
WO2007010008A1 (fr) 2007-01-25

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