(19)
(11) EP 0 325 356 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.07.1990 Bulletin 1990/29

(43) Date of publication A2:
26.07.1989 Bulletin 1989/30

(21) Application number: 89300214.7

(22) Date of filing: 11.01.1989
(51) International Patent Classification (IPC)4: F23N 1/00
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR IT LI LU NL SE

(30) Priority: 21.01.1988 US 146501

(71) Applicant: HONEYWELL INC.
Minneapolis Minnesota 55408 (US)

(72) Inventors:
  • Adams, Wilmer L.
    Fridley Minnesota 55432 (US)
  • Landis, William R.
    Bloomington Minnesota 55431 (US)
  • Kidder, Kenneth B.
    Coon Rapids Minnesota 55433 (US)
  • Black, Robert A., Jr.
    Brooklyn Park Minnesota 55443 (US)
  • Bartels, James I.
    Hudson Wisconsin 54016 (US)

(74) Representative: Fox-Male, Nicholas Vincent Humbert 
Honeywell Control Systems Limited, Honeywell House, Arlington Business Park
Bracknell, Berkshire RG12 1EB
Bracknell, Berkshire RG12 1EB (GB)


(56) References cited: : 
   
       


    (54) Multiple fuel burner control system


    (57) A system for interconnecting a plurality of fuel burners (14-17) utilizes program modules (30-33) at each of the burners. The program modules contain microcomputers (86) and are interconnected with a communications module (41) by a first level data bus (40-43). This interconnection and the programming of the modules prevents cross talk between the units. The communications module further is connected to a second level data bus (70), that provides auxiliary functions without interaction with the data contained on the first data buses. The information supplied to the second data bus is limited so that no safety related function can be affected.







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