The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Nov. 08, 1988

Filed:

Apr. 30, 1987
Applicant:
Inventors:

Tadashi Inoue, Hirakata, JP;

Noboru Asami, Nagaokakyo, JP;

Mitsuru Nakamura, Uji, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ;
U.S. Cl.
CPC ...
364900 ; 371 19 ; 364144 ;
Abstract

A programmable controller which executes instructions stored in a user program memory to thereby effect predetermined system control. The programmable controller includes a mode designation section for designating a trace trigger mode, an origin instruction input section for inputting an instruction which forms an origin of the trace trigger, an origin instruction memory section for storing the origin instruction inputted from the origin instruction input section, an instruction extraction section for receiving the designation of the trace trigger mode to extract the instruction in coincidence with the origin instruction stored in the origin instruction memory section out of a group of instructions subjected to execution and processing by the instruction execution section, a trace information extraction section for extracting trace information whose reference is the instruction extracted by the instruction extraction section out of a group of instructions subjected to execution and processing by the instruction execution section, a trace information memory section for storing the trace information, and a display section for displaying the trace information stored in the trace information memory section.


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