Method for debugging a program by executing a block mode run

Details Method for debugging a program by executing a block mode run Method for debugging a program by executing a block mode run

1991-02-15

1994-04-05

Beausoliel, Jr., Robert W.

Excavating

395375, 395500, 395800, 364267, 36426791, 364DIG1, G06F 1100

Patent

active

053011988

ABSTRACT:
A method for debugging a sequential program, executable by a programmable controller on the basis of input instructions from a programming unit. The program is stored in an intermediate language, converted from a ladder language or a sequential function language input from the programming unit, and may be debugged using several methods. One method involves execution of single instructions starting at a predetermined word and executing an operator-specified number of instruction words. A second method involves a loop-specified process in which a starting word and a subsequent stopping word are identified as well as a number of loops to be executed between the two words; the operation preceding until the loop count is zero. A third method involves a block mode run in which a starting word is identified as the beginning of a run and its end is the last word in the block to which the starting word relates, the end word being automatically identified as a transition between an output instruction and a subsequent input instruction. The number of words from the start word to the end of the block is calculated and used as a basis for determining the extent of the block mode run.

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patent: 5021948 (1991-06-01), Nakayama et al.

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