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Title:
LOADER FOR PROGRAMMABLE CONTROLLER
Document Type and Number:
Japanese Patent JP3661336
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To easily recognize the nest level of the master control of an optional program and to facilitate the debugging of a ladder program and program preparation by providing a loader with a means for displaying the nest level for indicating the master control level of the ladder program on the bus of a ladder circuit.
SOLUTION: The program for the display of the nest level is prepared in the main memory 8 or the like of this loader 2. Then, in order to realize the display function of the nest level, the ladder program stored in an external storage device 5 such as a hard disk or the like is called back to the main memory 8 by the operation of a keyboard 6 or the operation of a pointing device such as a mouse 7 or the like, an MCS instruction is retrieved by successively scanning the program from the head, the value of a counter is increased (+1) when the ladder of the MCS instruction is found and the value of the counter is displayed at the bus part of the ladder circuit after the MCS instruction.


Inventors:
藤井 正人
石川 貴教
Application Number:
JP1997000038732
Publication Date:
June 15, 2005
Filing Date:
February 24, 1997
Export Citation:
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Assignee:
株式会社明電舎
International Classes:
G06F9/06; G05B19/048; G05B19/05; G05B23/02; (IPC1-7): G05B19/048; G05B19/05; G05B23/02; G06F9/06
Domestic Patent References:
JP2151903A
JP1149108A
JP8087406A
JP7064613A
JP8123515A
Attorney, Agent or Firm:
橋本 剛



 
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