EP1104609A2 - Bus system - Google Patents

Bus system

Info

Publication number
EP1104609A2
EP1104609A2 EP00926712A EP00926712A EP1104609A2 EP 1104609 A2 EP1104609 A2 EP 1104609A2 EP 00926712 A EP00926712 A EP 00926712A EP 00926712 A EP00926712 A EP 00926712A EP 1104609 A2 EP1104609 A2 EP 1104609A2
Authority
EP
European Patent Office
Prior art keywords
bus
supply voltage
coupling module
wire
point
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Withdrawn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
EP00926712A
Other languages
German (de)
French (fr)
Inventor
Elmar Flaschka
Clemens Hoga
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP1104609A2 publication Critical patent/EP1104609A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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]
    • H04L12/42—Loop networks
    • 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
    • H04L12/40006—Architecture of a communication node
    • H04L12/40032—Details regarding a bus interface enhancer
    • 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]
    • H04L12/42—Loop networks
    • H04L12/437—Ring fault isolation or reconfiguration

Definitions

  • the invention relates to a bus system with one on one
  • Coupling module interconnected to form a ring structure, a line structure of the bus being implemented by a separation point in the coupling module, and with a monitoring device contained in the coupling module, which monitors the bus for matching states on both sides of the separation point and, in the event of non-compliance, the separation point via a controllable one Switching device closes.
  • Such a bus system is made of Siemens power generation - K U: Control technology power generation: Products & Services: SIMATIC NET bus system, online on the Internet: URL: http: // www. Siemens. de / kwu / d / foa / l / products / prodl60.htm (as of January 29, 1999).
  • the bus subscribers are connected to a bus via star couplers.
  • the bus is interconnected with the star couplers in a ring structure, a line structure being implemented by a separation point in one of the star couplers.
  • the signals (telegrams) arriving from both directions are monitored at the separation point. If the signals only come from one direction, the bus must be interrupted. In this case, the separation point is closed by a controllable switch, so that a closed line structure of the bus is restored and all bus participants can communicate with each other again via the bus.
  • Monitoring the bus for matching telegrams on both sides of the separation point is comparatively complex and can be associated with delays due to the telegram evaluation required for this.
  • the monitoring function only effective in times when telegrams are being transmitted via the bus.
  • the invention has for its object to ensure a particularly simple and safe bus redundancy.
  • the object is achieved in that, in the bus system of the type specified at the outset, the bus has wires for supplying power to bus users and in that the monitoring device is designed to detect and compare the supply voltage on the wires on both sides of the separation point.
  • the supply voltage on both sides of the disconnection point is monitored and compared instead of the telegrams in order to detect an interruption in the bus.
  • the monitoring of the supply voltage is particularly simple, interference-proof and possible even if no telegrams are transmitted.
  • all buses come into question in which the power supply and data transfer are carried out over the same cable, be it that the telegrams on the supply voltage for the bus participants are modulated or that, such as. B. with optical data transmission, the telegrams and the supply voltage are transmitted on separate wires.
  • the coupling module preferably contains a bus subscriber device coupled to the bus, the monitoring device detecting the non-compliance of the supply voltage on both sides of the disconnection point Bus subscriber device for the delivery of a
  • the error message advantageously contains information about Which side of the disconnection point the detected supply voltage falls below a minimum value, so that the location of the interruption of the bus with respect to the point at which the supply voltage is fed into the bus can be located more easily.
  • the controllable switching device used to close the disconnection point is preferably additionally controllable by a command that can be transmitted to the bus subscriber device via the bus.
  • the bus master can then specifically open and close the disconnection point to test the coupling module and to restart the bus that has been repaired after an interruption.
  • the coupling module can have a manually operable control element and / or a separate control signal input for actuating the controllable switching device.
  • FIG. 1 shows an embodiment of the bus system according to the invention and Figure 2 shows an embodiment of the bus coupler.
  • FIG. 1 shows a bus system consisting of a bus 1 with connected bus subscribers 2 ... 6, of which here the bus subscriber designated 4 as the bus master, ie active bus subscriber, and the other bus subscribers 2, 3, 5, 6 as Bus slaves, ie passive bus participants, are formed.
  • the bus 1 serves both for the transmission of telegrams, ie information, between the bus subscribers 2 ... 6, and for the transmission of the supply voltage for the power supply of the bus subscribers 2 ... 6, for which purpose a power supply unit 7, which supplies the supply voltage, on the Bus 1 is connected.
  • the ends of the bus 1 are interconnected to form a ring structure on a coupling module 8, but with a separation point 9 in the coupling module 8 is actually a line structure of the bus 1.
  • the coupling module 8 contains a controllable switching device 10, via which the normally open disconnection point 9 can be closed and opened again, and a monitoring device 11, which detects the supply voltage on the bus 1 on both sides of the disconnection point 9 and compares the voltage values obtained thereby.
  • the comparison includes determining whether the supply voltage supplied by the power supply unit 7 is present on the respective side of the disconnection point 9 or is not present as a result of an interruption 12 in the bus 1.
  • the presence of the supply voltage is detected by the detected voltage value exceeding a predetermined threshold value, while the absence of the supply voltage is detected by falling below a minimum value.
  • the detection and monitoring of the supply voltage on both sides of the disconnection point 9 can also be simplified in that the voltage across the disconnection point 9 is detected.
  • the monitoring device 11 If the interruption 12 of the bus 1 is detected on both sides of the disconnection point 9 due to different supply voltages, the monitoring device 11 generates a
  • the monitoring device 11 Simultaneously with the set signal 13, the monitoring device 11 generates an error signal 15 which is fed to a passive bus subscriber device (slave) 16 in the coupling module 8.
  • the bus subscriber device 16 which is connected to the bus 1 in the same way as the bus subscribers 2 ... 6, then gives an error message to the Bus 1, which is received by the bus participants, in particular the bus master 4.
  • the error message contains information about on which side of the disconnection point 9 the absence of the supply voltage was detected, so that the location of the interruption 12 is facilitated.
  • the disconnection point 9 can be opened again, either by a command transmitted from the bus master 4 to the bus subscriber device 16 or by manual actuation of an operating element 17 arranged on the coupling module 8.
  • the bus subscriber device 16 then generates a reset signal 18 with which the register 14 controlling the switching device 10 is reset.
  • the bus subscriber device 16 can also generate a set signal 19 for setting the register 14 depending on a command supplied to it via the bus 1 or on the actuation of the operating element 17, so that the separation point 9 can be opened and closed in a targeted manner for testing and restarting .
  • the latter contains a power supply device 20 which is connected to the bus 1 on both sides of the disconnection point 9 and receives the supply voltage from it.
  • both the bus telegrams and the supply voltage are transmitted via bus 1.
  • the telegrams and the supply voltage can be transmitted either on separate wires or a common wire of the bus 1, the telegrams being modulated onto the supply voltage in the latter case.
  • FIG. 2 shows an exemplary embodiment of the coupling module 8, which is coupled to a bus 1 with a first wire 21 for transmitting the telegrams, a second wire 22 for transmitting the supply voltage and a third wire 23 as a ground line.

Abstract

For redundancy reasons a bus system is interconnected into a ring-type structure on a coupling module, a line topology of the bus being configured by an isolating point in the coupling module. A monitoring device situated in the coupling module monitors the bus for conforming states on both sides of the isolating point, which in case of non-conformance is closed by means of a controllable switching device. An especially simple and reliable bus redundancy is achieved if the bus (1) presents conducting strands for supplying power to the bus nodes (2...6) and the supply voltage at the level of said strands is monitored on both sides of the isolating point (9).

Description

Beschreibungdescription
BussystemBus system
Die Erfindung betrifft ein Bussystem mit einem an einemThe invention relates to a bus system with one on one
Koppelmodul zu einer Ringstruktur zusammengeschalteten Bus, wobei durch eine Trennstelle in dem Koppelmodul eine Linienstruktur des Busses realisiert ist, und mit einer in dem Koppelmodul enthaltenen Überwachungseinrichtung, die den Bus auf übereinstimmende Zustände beiderseits der Trennstelle überwacht und im Falle der Nichtübereinstimmung die Trennstelle über eine steuerbare Schalteinrichtung schließt.Coupling module interconnected to form a ring structure, a line structure of the bus being implemented by a separation point in the coupling module, and with a monitoring device contained in the coupling module, which monitors the bus for matching states on both sides of the separation point and, in the event of non-compliance, the separation point via a controllable one Switching device closes.
Ein derartiges Bussystem ist aus Siemens Energieerzeugung- K U: Leittechnik Energieerzeugung: Produkte & Leistungen: Bussystem SIMATIC NET, online im Internet: URL: http: //www. siemens . de/kwu/d/foa/l/products/prodl60.htm (Stand: 29.01.1999) bekannt. Bei dem bekannten Bussystem sind die Busteilnehmer über Sternkoppler an einem Bus angeschlos- sen. Um die Verfügbarkeit und Fehlersicherheit des Bussystems zu erhöhen, ist der Bus mit den Sternkopplern in einer Ringstruktur zusammengeschaltet, wobei durch eine Trennstelle in einem der Sternkoppler eine Linienstruktur realisiert wird. An der Trennstelle werden die aus beiden Richtungen ankommen- den Signale (Telegramme) überwacht. Kommen die Signale nur aus einer Richtung, so muß von einer Unterbrechung des Busses ausgegangen werden. In diesem Fall wird die Trennstelle über einen steuerbaren Schalter geschlossen, so daß wieder eine geschlossene Linienstruktur des Busses hergestellt wird und alle Busteilnehmer wieder über den Bus miteinander kommunizieren können.Such a bus system is made of Siemens power generation - K U: Control technology power generation: Products & Services: SIMATIC NET bus system, online on the Internet: URL: http: // www. Siemens. de / kwu / d / foa / l / products / prodl60.htm (as of January 29, 1999). In the known bus system, the bus subscribers are connected to a bus via star couplers. In order to increase the availability and reliability of the bus system, the bus is interconnected with the star couplers in a ring structure, a line structure being implemented by a separation point in one of the star couplers. The signals (telegrams) arriving from both directions are monitored at the separation point. If the signals only come from one direction, the bus must be interrupted. In this case, the separation point is closed by a controllable switch, so that a closed line structure of the bus is restored and all bus participants can communicate with each other again via the bus.
Die Überwachung des Busses auf übereinstimmende Telegramme beiderseits der Trennstelle ist vergleichsweise aufwendig und kann aufgrund der dazu erforderlichen Telegrammauswertung mit Verzögerungen verbunden sein. Darüber hinaus ist die Über- wachungsfunktion nur in den Zeiten wirksam, in denen Telegramme über den Bus übertragen werden.Monitoring the bus for matching telegrams on both sides of the separation point is comparatively complex and can be associated with delays due to the telegram evaluation required for this. In addition, the monitoring function only effective in times when telegrams are being transmitted via the bus.
Der Erfindung liegt die Aufgabe zugrunde, eine besonders ein- fache und sichere Busredundanz zu gewährleisten.The invention has for its object to ensure a particularly simple and safe bus redundancy.
Gemäß der Erfindung wird die Aufgabe dadurch gelöst, daß bei dem Bussystem der eingangs angegebenen Art der Bus Adern zur Stromversorgung von Busteilnehmern aufweist und daß die Über- wachungseinrichtung zur Erfassung und zum Vergleich der Versorgungsspannung auf den Adern beiderseits der Trennstelle ausgebildet ist.According to the invention, the object is achieved in that, in the bus system of the type specified at the outset, the bus has wires for supplying power to bus users and in that the monitoring device is designed to detect and compare the supply voltage on the wires on both sides of the separation point.
Bei Bussystemen, die auf demselben Bus sowohl Telegramme als auch die Versorgungsspannung für die Busteilnehmer übertragen, wird also anstelle der Telegramme die Versorgungsspannung beiderseits der Trennstelle überwacht und verglichen, um eine Unterbrechung des Busses zu detektieren. Die Überwachung der Versorgungsspannung ist besonders einfach, störsicher und auch dann möglich, wenn keine Telegramme übertragen werden. Grundsätzlich kommen alle Busse in Frage, bei denen die Stromversorgung und der Datentransfer über dasselbe Kabel geführt werden, sei es, daß die Telegramme auf der Versorgungsspannung für die Busteilnehmer aufmoduliert sind oder daß, wie z. B. bei optischer Datenübertragung, die Telegramme und die Versorgungsspannung auf getrennten Adern übertragen werden.In bus systems that transmit both telegrams and the supply voltage for the bus users on the same bus, the supply voltage on both sides of the disconnection point is monitored and compared instead of the telegrams in order to detect an interruption in the bus. The monitoring of the supply voltage is particularly simple, interference-proof and possible even if no telegrams are transmitted. Basically, all buses come into question in which the power supply and data transfer are carried out over the same cable, be it that the telegrams on the supply voltage for the bus participants are modulated or that, such as. B. with optical data transmission, the telegrams and the supply voltage are transmitted on separate wires.
Um im Falle einer Unterbrechung des Busses die Busteilnehmer, insbesondere den Bus-Master (aktiver Busteilnehmer) , entsprechend informieren zu können, enthält das Koppelmodul vorzugsweise eine an den Bus angekoppelte Busteilnehmereinrichtung, wobei die Überwachungseinrichtung bei der Detektion einer Nichtübereinstimmung der Versorgungsspannung beiderseits der Trennstelle die Busteilnehmereinrichtung zur Abgabe einerIn order to be able to inform the bus subscribers, in particular the bus master (active bus subscriber) accordingly, in the event of an interruption of the bus, the coupling module preferably contains a bus subscriber device coupled to the bus, the monitoring device detecting the non-compliance of the supply voltage on both sides of the disconnection point Bus subscriber device for the delivery of a
Fehlermeldung auf den Bus ansteuert. Die Fehlermeldung enthält dabei in vorteilhafter Weise Informationen darüber, auf welcher Seite der Trennstelle die erfaßte Versorgungsspannung einen Minimalwert unterschreitet, so daß der Ort der Unterbrechung des Busses in bezug auf die Stelle der Einspeisung der Versorgungsspannung in den Bus einfacher lokalisiert werden kann.Error message triggered on the bus. The error message advantageously contains information about Which side of the disconnection point the detected supply voltage falls below a minimum value, so that the location of the interruption of the bus with respect to the point at which the supply voltage is fed into the bus can be located more easily.
Die zum Schließen der Trennstelle dienende steuerbare Schalteinrichtung ist vorzugsweise zusätzlich durch einen über den Bus an die Busteilnehmereinrichtung übertragbaren Befehl steuerbar. Der Bus-Master kann dann zum Testen des Koppelmoduls und zur Wiederinbetriebnahme des nach einer Unterbrechung reparierten Busses die Trennstelle gezielt öffnen und schließen. Alternativ oder vorzugsweise zusätzlich kann das Koppelmodul ein manuell betätigbares Bedienelement und/oder einen separaten Steuersignaleingang zur Betätigung der steuerbaren Schalteinrichtung aufweisen.The controllable switching device used to close the disconnection point is preferably additionally controllable by a command that can be transmitted to the bus subscriber device via the bus. The bus master can then specifically open and close the disconnection point to test the coupling module and to restart the bus that has been repaired after an interruption. Alternatively or preferably additionally, the coupling module can have a manually operable control element and / or a separate control signal input for actuating the controllable switching device.
Zur weiteren Erläuterung der Erfindung wird im folgenden auf die Figur der Zeichnung Bezug genommen; im einzelnen zeigen jeweils in Form eines Blockschaltbildes:To further explain the invention reference is made below to the figure of the drawing; each show in the form of a block diagram:
Figur 1 ein Ausführungsbeispiel des erfindungsgemäßen Bussystems und Figur 2 ein Ausführungsbeispiel für den Buskoppler.Figure 1 shows an embodiment of the bus system according to the invention and Figure 2 shows an embodiment of the bus coupler.
Figur 1 zeigt ein Bussystem, bestehend aus einem Bus 1 mit daran angeschlossenen Busteilnehmern 2 ... 6, von denen hier der mit 4 bezeichnete Busteilnehmer als Bus-Master, d. h. aktiver Busteilnehmer, und die anderen Busteilnehmer 2, 3, 5, 6 als Bus-Slaves, d. h. passive Busteilnehmer, ausgebildet sind. Der Bus 1 dient sowohl zur Übertragung von Telegrammen, d. h. Informationen, zwischen den Busteilnehmern 2 ... 6, als auch zur Übertragung der Versorgungsspannung für die Stromversorgung der Busteilnehmer 2 ... 6, wozu ein die Versor- gungsspannung lieferndes Netzteil 7 an dem Bus 1 angeschlossen ist. Der Bus 1 ist mit seinen Enden an einem Koppelmodul 8 zu einer Ringstruktur zusammengeschaltet, wobei aber durch eine Trennstelle 9 in dem Koppelmodul 8 tatsächlich eine Linienstruktur des Busses 1 realisiert ist.FIG. 1 shows a bus system consisting of a bus 1 with connected bus subscribers 2 ... 6, of which here the bus subscriber designated 4 as the bus master, ie active bus subscriber, and the other bus subscribers 2, 3, 5, 6 as Bus slaves, ie passive bus participants, are formed. The bus 1 serves both for the transmission of telegrams, ie information, between the bus subscribers 2 ... 6, and for the transmission of the supply voltage for the power supply of the bus subscribers 2 ... 6, for which purpose a power supply unit 7, which supplies the supply voltage, on the Bus 1 is connected. The ends of the bus 1 are interconnected to form a ring structure on a coupling module 8, but with a separation point 9 in the coupling module 8 is actually a line structure of the bus 1.
Das Koppelmodul 8 enthält eine steuerbare Schalteinrichtung 10, über die die normalerweise offene Trennstelle 9 geschlossen und wieder geöffnet werden kann, sowie eine Überwachungseinrichtung 11, die die Versorgungsspannung auf dem Bus 1 beiderseits der Trennstelle 9 erfaßt und die dabei erhaltenen Spannungswerte miteinander vergleicht. Der Vergleich beinhal- tet die Feststellung, ob auf der jeweiligen Seite der Trennstelle 9 die von dem Netzteil 7 gelieferte Versorgungsspannung vorhanden oder als Folge einer Unterbrechung 12 des Busses 1 nicht vorhanden ist. Das Vorhandensein der Versorgungsspannung wird dadurch detektiert, daß der erfaßte Spannungswert einen vorgegebenen Schwellenwert überschreitet, während das NichtVorhandensein der Versorgungsspannung dadurch detektiert wird, daß ein Minimalwert unterschritten wird. Die Erfassung und Überwachung der Versorgungsspannung beiderseits der Trennstelle 9 kann vereinfacht auch dadurch erfolgen, daß die Spannung über der Trennstelle 9 erfaßt wird.The coupling module 8 contains a controllable switching device 10, via which the normally open disconnection point 9 can be closed and opened again, and a monitoring device 11, which detects the supply voltage on the bus 1 on both sides of the disconnection point 9 and compares the voltage values obtained thereby. The comparison includes determining whether the supply voltage supplied by the power supply unit 7 is present on the respective side of the disconnection point 9 or is not present as a result of an interruption 12 in the bus 1. The presence of the supply voltage is detected by the detected voltage value exceeding a predetermined threshold value, while the absence of the supply voltage is detected by falling below a minimum value. The detection and monitoring of the supply voltage on both sides of the disconnection point 9 can also be simplified in that the voltage across the disconnection point 9 is detected.
Wird aufgrund unterschiedlicher Versorgungsspannungen beiderseits der Trennstelle 9 die Unterbrechung 12 des Busses 1 detektiert, so erzeugt die Überwachungseinrichtung 11 einIf the interruption 12 of the bus 1 is detected on both sides of the disconnection point 9 due to different supply voltages, the monitoring device 11 generates a
Setzsignal 13, mit dem ein die Schalteinrichtung 10 steuerndes Register 14 gesetzt und als Folge die Trennstelle 9 über die Schalteinrichtung 10 geschlossen wird. Damit ist die Linienstruktur des Busses 1 wieder hergestellt und die Bus- teilnehmer 2 ... 6 können wieder miteinander kommunizieren.Set signal 13 with which a register 14 controlling the switching device 10 is set and, as a result, the disconnection point 9 is closed via the switching device 10. The line structure of the bus 1 is thus restored and the bus users 2 ... 6 can communicate with each other again.
Gleichzeitig mit dem Setzsignal 13 erzeugt die Überwachungseinrichtung 11 ein Fehlermeldesignal 15, das einer passiven Busteilnehmereinrichtung (Slave) 16 in dem Koppelmodul 8 zu- geführt wird. Die Busteilnehmereinrichtung 16, die in gleicher Weise wie die Busteilnehmer 2 ... 6 an dem Bus 1 angeschlossen ist, gibt daraufhin eine Fehlermeldung auf den Bus 1, die von den Busteilnehmern, insbesondere dem Bus- Master 4, aufgenommen wird. Die Fehlermeldung enthält eine Information darüber, auf welcher Seite der Trennstelle 9 das Nichtvorhandensein der Versorgungsspannung detektiert wurde, so daß die Ortung der Unterbrechung 12 erleichtert wird.Simultaneously with the set signal 13, the monitoring device 11 generates an error signal 15 which is fed to a passive bus subscriber device (slave) 16 in the coupling module 8. The bus subscriber device 16, which is connected to the bus 1 in the same way as the bus subscribers 2 ... 6, then gives an error message to the Bus 1, which is received by the bus participants, in particular the bus master 4. The error message contains information about on which side of the disconnection point 9 the absence of the supply voltage was detected, so that the location of the interruption 12 is facilitated.
Nach Beseitigung der Unterbrechung 12 in dem Bus 1 kann die Trennstelle 9 wieder geöffnet werden, was entweder durch einen von dem Bus-Master 4 an die Busteilnehmereinrichtung 16 übertragenen Befehl oder durch manuelle Betätigung eines an dem Koppelmodul 8 angeordneten Bedienelements 17 erfolgt. Die Busteilnehmereinrichtung 16 erzeugt daraufhin ein Rücksetzsignal 18, mit dem das die Schalteinrichtung 10 steuernde Register 14 zurückgesetzt wird. Die Busteilnehmereinrichtung 16 kann darüber hinaus in Abhängigkeit von einem ihr über den Bus 1 zugeführten Befehl oder von der Betätigung des Bedienelements 17 ein Setzsignal 19 zum Setzen des Registers 14 erzeugen, so daß die Trennstelle 9 zum Testen und zur Wiederinbetriebnahme gezielt geöffnet und geschlossen werden kann.After the interruption 12 in the bus 1 has been eliminated, the disconnection point 9 can be opened again, either by a command transmitted from the bus master 4 to the bus subscriber device 16 or by manual actuation of an operating element 17 arranged on the coupling module 8. The bus subscriber device 16 then generates a reset signal 18 with which the register 14 controlling the switching device 10 is reset. The bus subscriber device 16 can also generate a set signal 19 for setting the register 14 depending on a command supplied to it via the bus 1 or on the actuation of the operating element 17, so that the separation point 9 can be opened and closed in a targeted manner for testing and restarting .
Zur Stromversorgung des Koppelmoduls 8 enthält dieses eine Stromversorgungseinrichtung 20, die beiderseits der Trennstelle 9 an dem Bus 1 angeschlossen ist und von diesem die Versorgungsspannung bezieht.To supply power to the coupling module 8, the latter contains a power supply device 20 which is connected to the bus 1 on both sides of the disconnection point 9 and receives the supply voltage from it.
Wie bereits erwähnt, werden sowohl die Bustelegramme als auch die Versorgungsspannung über den Bus 1 übertragen. Dabei können die Telegramme und die Versorgungsspannung entweder auf getrennten Adern oder einer gemeinsamen Ader des Busses 1 übertragen werden, wobei im letzteren Fall die Telegramme auf der Versorgungsspannung aufmoduliert sind.As already mentioned, both the bus telegrams and the supply voltage are transmitted via bus 1. The telegrams and the supply voltage can be transmitted either on separate wires or a common wire of the bus 1, the telegrams being modulated onto the supply voltage in the latter case.
Figur 2 zeigt ein Ausführungsbeispiel für das Koppelmodul 8, das an einen Bus 1 mit einer ersten Ader 21 zur Übertragung der Telegramme, einer zweiten Ader 22 zur Übertragung der Versorgungsspannung und einer dritten Ader 23 als Masseleitung angekoppelt ist. Bei der die Telegramme übertragenden FIG. 2 shows an exemplary embodiment of the coupling module 8, which is coupled to a bus 1 with a first wire 21 for transmitting the telegrams, a second wire 22 for transmitting the supply voltage and a third wire 23 as a ground line. With the transmitting the telegrams

Claims

Ader 21 kann es sich sowohl um eine elektrische Leitung als auch um einen Lichtwellenleiter handeln. Sowohl für die Ader 21 als auch für die Ader 22, gegebenenfalls auch für die Ader 23, ist jeweils eine Trennstelle 24, 25 vorgesehen, die mit- tels der steuerbaren Schalteinrichtung 10 geöffnet oder geschlossen werden kann. Die übrigen Komponenten des Koppelmoduls 8 entsprechen denen in Figur 1 und sind mit denselben Bezugszeichen versehen.Core 21 can be both an electrical line and an optical waveguide. A separation point 24, 25, which can be opened or closed by means of the controllable switching device 10, is provided both for the wire 21 and for the wire 22, if appropriate also for the wire 23. The other components of the coupling module 8 correspond to those in Figure 1 and are provided with the same reference numerals.
Darüber hinaus ist zu sehen, daß die Erfassung der Versorgungsspannung beiderseits der Trennstelle 25 durch die Überwachungseinrichtung 11 über Filter 26 und 27 erfolgt, die Störspannungen unterdrücken und zur Pegelanpassung auf den Logikpegel der Logikschaltung der Überwachungseinrichtung 11 dienen.In addition, it can be seen that the detection of the supply voltage on both sides of the isolating point 25 is carried out by the monitoring device 11 via filters 26 and 27, suppress the interference voltages and are used for level adjustment to the logic level of the logic circuit of the monitoring device 11.
Die Stromversorgungseinrichtung 20 ist über Entkopplungsdioden 28 und gegebenenfalls 29 an der Ader 22 des Busses 1 angeschlossen, wodurch ein Kurzschluß der Trennstelle 25 verhindert wird. The power supply device 20 is connected via decoupling diodes 28 and optionally 29 to the wire 22 of the bus 1, thereby preventing a short circuit in the isolating point 25.
manuell betätigbares Bedienelement (17) und/oder einen separaten Steuersignaleingang zur Betätigung der steuerbaren Schalteinrichtung (10) aufweist. manually operable control element (17) and / or a separate control signal input for actuating the controllable switching device (10).
EP00926712A 1999-04-14 2000-04-10 Bus system Withdrawn EP1104609A2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19916894 1999-04-14
DE19916894A DE19916894B4 (en) 1999-04-14 1999-04-14 bus system
PCT/DE2000/001096 WO2000062478A2 (en) 1999-04-14 2000-04-10 Bus system

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EP1104609A2 true EP1104609A2 (en) 2001-06-06

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DE19916894B4 (en) 2005-09-08
DE19916894A1 (en) 2000-10-26
US6640276B2 (en) 2003-10-28
WO2000062478A3 (en) 2001-03-15
US20030037272A1 (en) 2003-02-20
WO2000062478A2 (en) 2000-10-19
WO2000062478A9 (en) 2001-11-22

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