04535456 is referenced by 27 patents and cites 5 patents.

To permit, by a program, supervision of a programmable controller, which controls, for example, operation of a machine tool, or other device in which sequential events occur, a computer controlled diagnostic unit (2) is connected to the programmable controller (1). The stepping or sequencing structure of the program in the programmable controller (1) is stored in the diagnostic unit (2), for example in a fixed memory (ROM 4). Supervision of the control of the machine tool, engine, or other operating unit, for example due to malfunction of transducers, connecting lines, and the like, is supervised by testing if the conditions for going from one step in a program to the next step are always satisfied; if an error is recognized, the respective steps of the control program are interrogated, and the conditions for stepping from one step to the next are tested. That one of the steps which does not meet the further sequencing conditions--or the next preceding one which does meet the conditions--then provide an indication of the source of the error, malfunction or trouble.

Title
Method of detecting execution errors in program-controlled apparatus
Application Number
6/466875
Publication Number
4535456
Application Date
February 16, 1983
Publication Date
August 13, 1985
Inventor
Heinz Huber
Ludwigsburg
DE
Karl Heinz Fischer
Markgroningen
DE
Kurt Bauer
Ostfildern-Nellingen
DE
Agent
Frishauf Holtz Goodman & Woodward
Assignee
Robert Bosch
DE
IPC
G06F 11/00
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