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    • 21. 发明专利
    • DATA TRANSMISSION SYSTEM BETWEEN CENTRAL PROCESSING UNITS
    • JPS54144842A
    • 1979-11-12
    • JP5271278
    • 1978-05-04
    • HITACHI LTD
    • YOTSUMOTO HIROSHIHASEGAWA KUNIO
    • G06F15/16G06F15/173
    • PURPOSE:To obtain the data transmission system which makes easy the processing at error taken place with a simple constitution, by using separate system for the coupling control of one set of CPU of higher rank and one of a plurality of CPU's at lower rank and the data correspondence control. CONSTITUTION:The CPU1 at higher rank is provided with the process input and output unit PIO11 and the data transmission unit 30, and the PIO11 has the digital outputs DO and the interruption inputs INT as the number of sets of lower rank CPU's. The lower rank CPU group 2 is provided with the PIO group 13 respectively and it is connected to the PIO 11 via the signal line 12. The lower rank CPU group 2 is commonly provided with the common data bus 9, common data bus selection unit 10, and data transmission unit 40. The data transmission between the upper rank CPU and the lower rank CPU group is connected via DO and INT for the specific lower rank PIO 13 from PIO 11, and the respective CPU 2 is connected to the bus 9 via the unit 10 with program operation and data transmission is made with the units 30 and 40. Thus, true data transmission is started, the error at data transmission is specified, and the error processing is made easy.
    • 22. 发明专利
    • COMPOSITE COMPUTER SYSTEM
    • JPS54139445A
    • 1979-10-29
    • JP4661578
    • 1978-04-21
    • HITACHI LTD
    • KAWAGUCHI KOUICHIHASEGAWA KUNIOYOTSUMOTO HIROSHI
    • G06F15/16G06F15/167G06F15/177
    • PURPOSE:To omit the hardware exclusive for communication between processors by securing a rational and independent use for the processor proper memory unit and the shared memory unit, and thus to ensure the recomposition of the system with enhanced maintenance and expansion performance. CONSTITUTION:In the composite computer system of the load sharing type comprising two units of processors 1 and 2, processor 1 and 2 are connected to shared memory unit 3 between processors. And the access can be given to unit 3 from either processor 1 or 2. Shared resources control unit 7 and 9 (for external memory unit, printer, etc.) selects the allotment of shared resources group 8 and 10 to either of the processors. Specification part 12 and 13 of common information form C store the definite procedure and process result for the job process to be stored in unit 3 in the form of a table. At the same time, process program 16 and 18 of information form I-series and II-series carry out the actual process based on the procedure shown in part 12 and 13. The programs are exactly identical on both processors 1 and 2.
    • 23. 发明专利
    • BUMPLESS CHANGINGGOVER METHOD IN PROCESS CONTROL
    • JPS54138972A
    • 1979-10-27
    • JP4536078
    • 1978-04-19
    • HITACHI LTD
    • NISHIO YOSHIAKIHASEGAWA KUNIO
    • G05B7/02G05B15/02
    • PURPOSE:To attain a bumpless changing-over operation from a manual setting to a computer setting in a process control by constituting a changing-over method such that a set signal during a manual setting is applied to a computer and then a process is performed to bring a computer set value into coincidence with a manually set value whereafter the computer set value is output. CONSTITUTION:An analogue recording controller 2 outputs an operation signal 8 depending upon a deviation of a computer set signal 13 supplied from a computer 1 or a manually set signal 7 from a process signal 5. A changing-over operation from the manual setting to the computer setting is effected by changing-over of a gate 11 in response to a gate changing-over signal 12, but ordinarily, a bump occurs then since there is a difference between the two set signals. According to the invention, in order to prevent a bump, a process is performed to bring the computer set signal 13 into coincidence with the manually set signal 7 before a changing-over signal 12 is output from the computer 1.
    • 30. 发明专利
    • COMPONENT HOUSING BOX AND BEAM MEMBER FOR THE BOX
    • JPH05201488A
    • 1993-08-10
    • JP927392
    • 1992-01-22
    • HITACHI LTD
    • ENOMOTO KUNIOHASEGAWA KUNIOUSUI YOSHINORI
    • B65D90/08H05K5/04
    • PURPOSE:To provide a component housing box appropriate for housing electric components for controlling vehicles and to reduce a stress functioning to a coupling of beams to improve strength and rigidity by forming a beam member constituting a frame with bent parts corresponding to corners to rectangular frames. CONSTITUTION:An electric component housing box to be used in a hung state on a lower part of a vehicle truck has a box frame comprising a plurality of rectangular frames 10(a, b,...) placed in parallel. Each rectangular frame 10 comprises two bent parts corresponding to its corners and a U-shaped beam member 11 coupled wherein linear parts connected to the bent parts are formed integrally. That is, the linear parts on both ends of the two U-shaped beam members 11 are butted against each other on upper and lower faces of a box and coupled together by tightening with a linear coupling 12. A U-shaped panel 16 molded by a plane bent such that a bottom and right and left sides are closed is attached to the box frame thus constituted, and corresponding panels are fixed respectively to remaining front and rear faces and the top face.