EP0728581B1 - Bussystem für eine Druckmaschine - Google Patents

Bussystem für eine Druckmaschine Download PDF

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Publication number
EP0728581B1
EP0728581B1 EP96101643A EP96101643A EP0728581B1 EP 0728581 B1 EP0728581 B1 EP 0728581B1 EP 96101643 A EP96101643 A EP 96101643A EP 96101643 A EP96101643 A EP 96101643A EP 0728581 B1 EP0728581 B1 EP 0728581B1
Authority
EP
European Patent Office
Prior art keywords
bus
stations
connection
station
transmitting
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.)
Expired - Lifetime
Application number
EP96101643A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0728581A3 (de
EP0728581A2 (de
Inventor
Johannes Tenfelde
Michael Dotzert
Gerold Wende
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen 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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0728581A2 publication Critical patent/EP0728581A2/de
Publication of EP0728581A3 publication Critical patent/EP0728581A3/de
Application granted granted Critical
Publication of EP0728581B1 publication Critical patent/EP0728581B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0009—Central control units

Definitions

  • the invention relates to a bus system for a printing press according to the preamble of Claim 1.
  • the lines representing the bus system are used for installation and service work often charged in an improper manner. So it can happen that the cable an optical waveguide or a coax conductor is bent or bent too much. It can also be done by pulling cables, especially through narrow, sharp-edged openings damage to the insulation or protective sheathing. Such Damage options are also exposed to twisted pair wire buses.
  • Coax or twisted two-wire bus Interference fields to reduce the transmission capacity, if not to the total transmission failure of the respective bus system to lead.
  • Such disturbances also represent a severe impairment of the Bus system, which is particularly the case when lines are used in particular Service lines are not routed properly and in close proximity to others Line systems arrive. Aging in components, especially with optoelectronic ones Signal transmission are a potential source of errors.
  • EP-A 0 270 871 describes a system for input and / or output of signals known a digital control system. Individual peripheral units are over one Bus system, output register and output stage connected to a control unit. The content of the output register and the output signals of the output stages are separated can be queried.
  • the object of the present invention is therefore a bus system according to the preamble of claim 1 to expand in such a way that, with a simple design, the above Disadvantages avoided and changes in the transmission capacity of the bus system can be recognized as early as possible.
  • bus or The bus system is also used for transmission lines in which data is transmitted in each case between neighboring stations in the manner of a loop.
  • At least one of those coupled to the bus system Stations has a bus coupler, which from time to time or each time it is switched on of the bus system (power-on) a signal sequence for the purpose of establishing a connection with the or the other stations on the bus system, this signal output by the Bus coupler takes place in such a way that at least one physical quantity of the bus system underlying line protocol outside of an intended framework lies.
  • This can be done in particular with optical fibers in such a way that e.g. a Master station for a power-on, i.e. switching on the printing press along with Control, via the bus system with the other stations a connection with less Tried to build up transmit power.
  • one Station repeated this connection establishment with successively increasing transmission power. Only when all the addressed stations establish the connection properly acknowledge - the acknowledgment is expediently carried out on the line protocol provided transmission power level -, the bus coupler switches the intended Station to the intended transmission power and the normal one takes place if there is no error Broadcast mode. By gradually increasing the transmission power when trying connections to the other stations it is possible to determine which minimum Transmitting power the bus line requires proper data transmission just barely allow. It is therefore the difference between the normal transmission power can be formed in accordance with the line protocol and the minimum transmission power determined in this way, from which a measure of the system reserve can be derived.
  • bus coupler designed according to the invention this can be determined and can be used, for example, to display a corresponding warning or even to trigger a system crash by locking the press drive can be used against tarnishing.
  • the principle according to the invention is not only limited for use in bus systems, which have fiber optic cables or optical fibers. Nor does it have to Transmit power with which a station tries to establish a connection to other stations, can be varied, but there can also be other physical quantities in the line protocol used differently.
  • potential Bus error sources can also be determined by establishing the connection with a different Transmission frequency, with a bandwidth other than intended, under conscious Addition of secondary or interference frequencies and the like can be carried out.
  • the criterion for determining the system reserve is the variation of a physical transmission size, So at what value the value of the varied physical quantity is a proper one Establishing a connection between the stations.
  • each station has a bus coupler according to the invention Transmission lines between neighboring stations.
  • Fig. 1 shows the printing units of a sheet-fed offset printing machine.
  • the individual printing units stations 1.1 to 1.5 designed as computers are assigned, which have a common and formed as an optical fiber bus 2 in signal connection with each other stand.
  • a station 1.1 like the other stations 1.2 to 1.5 (not shown there), has one Bus coupler 3, which consists of a transmitting 3.1 and receiving part 3.2. About the send 3.1 and receiving part 3.2, the transmission and reception of signals of the bus takes place 2 to and from the other stations 1.2 to 1.5.
  • the transmitting part 3.1 of the bus coupler 3 of the station 1.1 is with a control and Evaluation unit 4 in operative connection, so that on the bus 2 via the optoelectronics of the bus coupler 3 transmit signals with different signal power can be emitted.
  • transmitting part 3.1 has a light transmitter that can be controlled in terms of light output.
  • Control and evaluation unit 4 determines the power with which the light transmitter feeds the optical signals into the optical fiber.
  • FIG. 2 shows a time diagram according to which the control and evaluation unit 4 uses the Transmitting part 3.1 of the bus coupler 3, the transmission power for establishing a connection with the other stations 1.2 to 1.5 gradually increased.
  • the time diagram in FIG. 2 also includes Pn marked the transmission power of normal signal exchange.
  • the transmitting part 3.1 of the bus coupler 3 sends a total of three times signals for establishing a connection with a transmission power P, which is smaller than that normally provided Transmission power Pn.
  • Under the signal delivery to establish a connection with the remaining stations 1.2 to 1.5 is one in the optical fiber of bus 2 as a serial bus understand certain bit sequence.
  • the increase in transmission power P is from Signal delivery to signal delivery step by step up to the intended transmission power value Pn increased.
  • the time diagram of FIG. 3 shown under the time diagram of FIG. 2 shows the following: that only at a time T1 one of the stations 1.1 to 1.5 the signal sequence recognized for the purpose of establishing a connection and correspondingly with full transmission power to the transmitting station 1.1 has returned.
  • Control and evaluation unit 4 can thus generate a response signal A, which is here To be understood as an example, changes from 0 to 1 when one or more of the stations 1.1 to 1.5 the correct connection establishment has been acknowledged.
  • the stations 1.2 to 1.5 do not have to acknowledge the correct connection establishment, that with reduced Transmit power sent signals back to station 1.1, but it is also possible that the confirmation of the correct connection establishment by a predetermined signal or bit sequence takes place.
  • control and Evaluation unit 4 Since the control and Evaluation unit 4 has gradually increased the transmission power P and further by the control and Evaluation unit 4 can be determined via the receiving part 3.2 of the bus coupler 3 which point in time at which transmission power P from one of the stations 1.2 to 1.5 the correct connection establishment has been acknowledged, it can now be determined how big the difference between the normally provided transmission power Pn and the minimum required Is transmission power for proper data traffic. From this difference in performance a quality value can then be formed, which shows how large the power reserve of the Bus system is. If this previously defined power difference falls below a predetermined one Limit value, it can be provided to display a warning and / or to lock the drive of the printing machine against starting.
  • the invention was based on an actual bus or bus system explained. Only one station 1.1 has the bus coupler designed according to the invention 3 on. If the bus is designed as a loop, each of the existing stations points 1.1 - 1.n the bus coupler 3 according to the invention, so that a check of each Transmission lines between two neighboring stations. The one previously described The process is the same.

Landscapes

  • Small-Scale Networks (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Computer And Data Communications (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Rotary Presses (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Optical Communication System (AREA)
EP96101643A 1995-02-23 1996-02-06 Bussystem für eine Druckmaschine Expired - Lifetime EP0728581B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19506261A DE19506261A1 (de) 1995-02-23 1995-02-23 Bussystem für eine Druckmaschine
DE19506261 1995-02-23

Publications (3)

Publication Number Publication Date
EP0728581A2 EP0728581A2 (de) 1996-08-28
EP0728581A3 EP0728581A3 (de) 1997-05-21
EP0728581B1 true EP0728581B1 (de) 1998-09-02

Family

ID=7754807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96101643A Expired - Lifetime EP0728581B1 (de) 1995-02-23 1996-02-06 Bussystem für eine Druckmaschine

Country Status (5)

Country Link
US (1) US5730053A (ja)
EP (1) EP0728581B1 (ja)
JP (1) JP2766242B2 (ja)
AT (1) ATE170458T1 (ja)
DE (2) DE19506261A1 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19815185A1 (de) 1998-04-04 1999-10-07 Roland Man Druckmasch Steuerrechner für eine Druckmaschine
DE20000919U1 (de) * 2000-01-20 2000-03-09 Roland Man Druckmasch Überwachungseinrichtung für eine Druckmaschine
DE10311284B4 (de) * 2003-03-14 2005-11-24 Koenig & Bauer Ag Druckmaschine mit zumindest zwei Druckwerken
DE10318541A1 (de) * 2003-04-24 2004-11-11 Koenig & Bauer Ag Verfahren zur Messung, Dokumentation und Überwachung elektrischer Parameter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60124760A (ja) * 1983-12-12 1985-07-03 Mitsubishi Electric Corp バス監視装置
DE3642500A1 (de) * 1986-12-12 1988-06-23 Heidelberger Druckmasch Ag System zur ein- und/oder ausgabe von signalen eines digitalen steuersystems
DE3839248A1 (de) * 1988-11-21 1990-05-23 Roland Man Druckmasch Dezentraler steuerrechner, insbesondere innerhalb einer rotationsdruckmaschine, der ueber einen bus mit mehreren peripheren einheiten verbunden ist
DE4000295C2 (de) * 1990-01-08 1994-05-19 Heidelberger Druckmasch Ag Vorrichtung zur Diagnose eines Steuersystems einer Druckmaschine
DE4113321A1 (de) * 1991-04-24 1992-10-29 Merten Gmbh & Co Kg Geb Verfahren zur ueberwachung der funktion einer busankopplungseinheit
DE4237837A1 (ja) * 1991-11-21 1993-06-03 Koenig & Bauer Ag
DE4212742A1 (de) * 1992-04-16 1993-10-21 Bayerische Motoren Werke Ag Verfahren zur Fehlererkennung bei einem Datenbus
DE4437417A1 (de) * 1993-10-19 1995-04-20 Deutsche Bundespost Telekom Verfahren zur Überwachung von Digitalsignalverbindungen

Also Published As

Publication number Publication date
JP2766242B2 (ja) 1998-06-18
US5730053A (en) 1998-03-24
JPH08267722A (ja) 1996-10-15
DE59600488D1 (de) 1998-10-08
ATE170458T1 (de) 1998-09-15
DE19506261A1 (de) 1996-09-05
EP0728581A3 (de) 1997-05-21
EP0728581A2 (de) 1996-08-28

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