System for recording and remotely accessing operating data in a reproduction machine

• US 5,038,319 A
• Filed: 04/24/1989
• Issued: 08/06/1991
• Est. Priority Date: 04/24/1989
• Status: Expired due to Term

• Current Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Original Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Inventors: Capaccio, Vincent A., Platteter, Dale T., VanDuyn, Robert M., Westfall, Robert S., Filion, Joseph L., Rabjohns, Douglas T., Hill, John R. Jr., Carter, Jeff C.
• Primary Examiner(s): Shaw, Gareth D.
• Assistant Examiner(s): LOOMIS, JOHN C
• Application Number:
  US07/342,131
• Time in Patent Office: 834 Days
• Field of Search: 364/200, 364/300, 364/900, 364/464, 371/16
• US Class Current: 714/2
• CPC Class Codes: G03G 15/50 Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control sequencing control G03G21/14
• CPC Class Codes: G03G 15/5079 for maintenance
• CPC Class Codes: G03G 15/55 Self-diagnostics; Malfunction or lifetime display
• CPC Class Codes: G03G 2215/00109 Remote control of apparatus, e.g. by a host
• CPC Class Codes: G06F 11/34 Recording or statistical evaluation of computer activity, e.g. of down time, of input/output operation ; Recording or statistical evaluation of user activity, e.g. usability assessment

Abstract

System for recording and remotely accessing certain operating data in an electrostatographic reproduction machine for use in analyzing machine faults and software crashes, with transfer of the data to a remote service site either by floppy disk or telecommunications line.

Claims

1. In an electrostatographic reproduction machine with plural operating components;

control software including an operating system adapted to provide instructions for operating said components and an applications program for operating said components in response to said instructions, the combination of;

a) a dynamic memory for storing event data representing certain key machine operating events during operation of said machine;

b) a rigid disk for storing said control software, said disk including an event logger file for storing event data; and

c) data transfer means for periodically writing said event data from said dynamic memory to said event logger file on said disk during operation of said machine, said data transfer means overwriting at least some of the event data previously written to said event logger file whereby new event data is periodically written to said event logger file on said disk for storing;

said rigid disk including a crash logger file having a predetermined number of memory areas for storing blocks of crash data representing predetermined machine events on the occurrence of a software crash, said blocks of crash data including said event data in said dynamic memory;

said data transfer means writing a block of said crash data to said crash logger file in response to a software crash whereby to save said crash data for use in determining the causes of said crash;

said data transfer means writing each succeeding block of said crash data into the next successive one of said rigid disk memory areas, said data transfer means overwriting memory areas having previously stored blocks of said crash data starting with the first of said rigid disk memory areas in said crash logger file when the last one of said rigid disk memory areas has been written into;

each of said blocks of said crash data when written in said crash logger file by said data transfer means including crash identity data to identify each of said blocks of crash data in said crash logger file on erasure of said blocks of crash data;

said crash identify data being retained in said crash logger file on erasure of the block of crash data associated therewith.

10. The machine according to claim 1 including:

a) a floppy disk,

b) said machine including a floppy disk port for reading and writing data between said rigid disk and said floppy disk;

c) means to access said event logger file and transfer event data in said event logger file to said floppy disk for remote analysis of said event data at a site separate from said machine; and

d) means for analyzing said event data from said floppy disk at said site including

1) read means to read said event data on said floppy disk,

2) conversion means to convert said event data read from said floppy disk to a form enabling said event data to be visually displayed, and

3) display means for displaying said converted event data for visual inspection.

11. The machine according to claim 10 in which said display means comprises a CRT for displaying said event data for visual inspection.

12. The machine according to claim 10 in which said display means comprises a printer for printing said converted event data onto a copy material for visual inspection.

2. A system for collecting and transmitting predetermined physical data of an electrostatographic reproduction machine to a remote site for analyzing machine operation, said machine having plural operating components, control software including operating system software for operating said components, and a hard disk providing memory for storing said control software, the combination of:

a) means for periodically collecting said physical data on said disk while said machine is operating;

b) a communication channel coupling said machine to said remote site for transmission of said physical data from said hard disk to said remote site;

c) data transfer means for transmitting at least some of said physical data from said over said communication channel to said remote site for use in analyzing machine operation;

d) non-volatile memory means for permanently storing optimum operating parameters for said machine;

e) comparison means for comparing said physical data on said hard disk with said optimum operating parameters for said machine; and

f) control means for preventing transmission of said physical data from said hard disk to said remote site where comparison of said physical data on said hard disk and said optimum operating parameters by said comparison means indicates that machine operation is acceptable.

3. The machine according to claim 2 in which said communication channel has a data transmission rate different than the rate at which said physical data are generated;

and

means to convert the data rate of said physical data to the data transmission rate of said communication channel to enable transmission of said physical data over said communication channel to said remote site.

4. The machine according to claim 3 in which said physical data include timing data to identify the time at which the machine event represented by said physical data occured.

5. A system for retaining crash data in the event of a software crash in an electrostatographic reproduction machine having plural operating components;

and control software including an operating system to provide instructions for operating said components and an applications program for operating said components in response to said instructions, the combination of;

a) a rigid disk for storing said machine control software, said disk including a crash logger file;

b) data transfer means for writing a preset block of crash data including crash block identifying means for identifying each of said blocks of crash data to said crash logger file on said disk in response to a software crash;

c) said crash logger file having a limited number of memory areas for storing said blocks of crash data;

d) said data transfer means writing each succeeding block of crash data into the next successive one of said memory areas in said crash logger file;

e) where the last of said memory areas in said crash logger file is written into, said data transfer means overwriting the next succeeding block of said crash data into the first of said memory areas in said crash logger file thereby erasing said block of previously stored crash data in said first memory area except for the crash block identifying means for said previously stored block of crash data whereby to enable said previously stored block of crash data to be identified.

6. The machine according to claim 5 including access means for remotely accessing said blocks of crash data from said crash logger file.

7. The machine according to claim 6 in which

a) a dynamic memory for storing event data representing certain key machine operating events during operation of said machine;

b) said disk including an event logger file for storing said event data;

c) said data transfer means periodically writing said event data from said dynamic memory to said event logger file on said disk;

said data transfer means overwriting at least some of the event data previously stored in said event logger file whereby fresh event data is repeatedly stored in said event logger file; and

d) means responsive to said software crash to access said dynamic memory and combine said event data in said dynamic memory with said block of crash data for storage in said crash logger file on said disk.

8. A process for collecting event and software crash data from an electrostatographic reproduction machine, said machine having control software for operating said machine and rigid disk for storing said control software, comprising the steps of:

a) collecting event data representing preset key machine operating events by

1a) temporarily storing said event data in memory during operation of said machine, and

2a) periodically writing said stored event data from said memory to a first file on said rigid disk;

b) reading said stored event data by

1b) accessing said first file on said rigid disk,

2b) transferring said event data from said first file on said rigid disk to a floppy disk,

3b) reading said event data from said floppy disk at a remote site, and

4b) displaying said event data for visual inspection at said remote site;

c) collecting said crash data on a software crash by

1c) writing a predetermined block of said crash data including said event data to a second file on said rigid disk,

2c) writing crash block identifying data at the time said block of crash data is written to said second file, and

3c) repeating steps 1c and 2c for subsequent software crashes; and

d) where said second file is filled,

1d) writing succeeding blocks of crash data over previous blocks of crash data written to said second file starting with the block of crash data first written to said second file, and

2d) retaining in said second file the crash block identifying data for each block of said crash data written over whereby to enable each block of crash data written over to be identified.

9. The process according to claim 8 including the step of:

printing said event data from said floppy disk on copy paper for visual inspection.