1996-10-15
1998-05-12
Hafiz, Tariq R.
395 60, G06F 1518
Patent
active
057519129
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a schematic diagram creating system and, in particular, a schematic diagram creating system for creating a schematic diagram expressing, in a plurality of sheets, an electrical interconnection relation of a control panel and the like, for the control of a panel in each of various kinds of industries.
BACKGROUND ART
Generally, the schematic diagram expressed in a plurality of sheets is used as a circuit diagram for grasping the electrical interconnection relation of a control apparatus (e.g., a control panel) for the control of a plant in various kinds of industry. The schematic diagram shows the detail of an input/output relationship concerning various kinds of signals passed among power supply circuits, control circuits, (e.g., a card) equipped with various input/output signal processing functions, and devices in external apparatuses. In such schematic diagram system, for example, the input/output relation is shown, as a circuit diagram on a one-card-per-sheet basis, for an input/output signal processing function.
For the control panel, for example, for performing control in the plant in various kinds of industry, various kinds of specifications are prepared, such as a corresponding control, an operation, an input/output signal, etc., specification. In the input/output signal specification, in particular, the data on a vast amount of signals of various kinds passed in the control panel are arranged from an upper to a lower area. These items of data are composed, in detail, together with the kind, input designation, output designation, etc., of associated signals.
Based on the vast amount of data described on the input/output signal specification, etc., the composer of the schematic diagram has to, while adding predetermined design rules and know-how to the data, complete a schematic diagram on one control panel.
The composing procedure of the schematic diagram on the input/output signal processing, being explained in more detail, is as follows. First, the composer prints out, in a list format for instance, the input/output signal specification data held in a memory medium or the like. Thereafter, he or she sorts various kinds of input/output signals while reviewing the printed-out data. That is, he or she examines to which cards the various kinds of input/output signals in the list are matched and arranged the data of the input/output signals into the corresponding cards.
When the sorting of the various kinds of input/output signals is completed, the composer prepares a requisite number of sheets with a basic drawing described thereon, that is, the drawing (having no detailed circuits, signal names, etc., described thereon) serving as a basis of circuit diagrams. Where there are various kinds of unprinted sheets for preparing the basic drawings, the basic drawings are effectively prepared by the copying of the drawings on the unprinted sheets with the use of a copying machine.
Based on the input/output signal specification and design rules, the composer judges or reads out, from the input/output signal specification, the circuit patterns representing the connection and route between the respective cards and the external devices, the names of the input/output signals, the signs of the associated devices, etc., and writes these items of information on the basic drawings. By doing so, the hand-written schematic diagram sheets are prepared on a per-card(per sheet) basis.
Thereafter, in order to compose such schematic diagrams in book form, the associated diagram sheets are arranged and the sheet numbers are allocated to the diagram sheets. In this case, in order to enable the insertion of any additional diagram sheets between given sheets thereafter, consecutive numbers are not always given, under this consideration, from a first to a last diagram sheet.
Further, in order to provide a formal schematic diagram, the circuit diagrams are prepared, sheet by sheet, on an interactive type CAD (computer-aided design) system and done so, by an input unit, such as a
REFERENCES:
patent: 4539653 (1985-09-01), Bartlett et al.
patent: 5146672 (1992-09-01), Suzuki
Frezza et al. "A SPAR: A Schematic Place and Route System," IEEE Trans. on Computer Aided Design of Integrated Circuits and Systems, vol. 12, No. 7, pp. 956-973, Jul. 31, 1993.
Hafiz Tariq R.
Kabushiki Kaisha Toshiba
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