| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve on the conventional art, which includes a device for debugging a sequence program used for a programmable controller with a debugger which allows a user to understand how a state of input/output contacts has been changed in time series, and a debugging device and a program verification method which allow a user to verify behaviors of focused circuits only without re-editing a ladder program. <P>SOLUTION: When debugging a ladder program made by a user in a ladder programming tool for a programmable controller, changes done in the ladder program are stored in a storage element of the programmable controller and changed sections are retroactively displayed in a display device of a PC in response to a request of the user so as to edit the ladder program. <P>COPYRIGHT: (C)2013,JPO&INPIT |
