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Distributed Exception-Processing for Manufacturing Process Control

IP.com Disclosure Number: IPCOM000100040D
Original Publication Date: 1990-Mar-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Reid, J: AUTHOR [+3]

Abstract

This article describes a flexible exception-processing mechanism developed as part of a Manufacturing Process Control System. Traditionally, exception processing code would be imbedded within application programs, and would include a large element of specialized code to handle individual situations. This approach is both wasteful by potential duplication of code and is difficult to maintain and enhance, as production line requirements change.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Distributed Exception-Processing for Manufacturing Process Control

       This article describes a flexible exception-processing
mechanism developed as part of a Manufacturing Process Control
System.  Traditionally, exception processing code would be imbedded
within application programs, and would include a large element of
specialized code to handle individual situations.  This approach is
both wasteful by potential duplication of code and is difficult to
maintain and enhance, as production line requirements change.

      The disclosed mechanism is designed to interpret and handle
exception and process events occurring within the manufacturing
environment, although flexibility is built-in to also handle
application errors.  The strength of the mechanism is its ability to
be easily tuned to handle new conditions and changes to an existing
manufacturing process by the use of command tables.  It can be done
without interruption to currently active programs or impacting the
production line, a factor important in the high-volume card business
or similar continuous process.

      The typical process control environment is complex,
encompassing multiple levels of control, for example,
     Control Room Operator
     Area Control
     Movement Planning
     Movement Control
     Conveyor system PLC's / Automatic Cranes

      At the level in which it occurs, an exception is identified and
categorized by type.  Based on a list of commands for the exception
type in question, this level of c...