| 摘要 |
<p>PROBLEM TO BE SOLVED: To discover an operation error of an operator and an error of a signal connection sequence with an external equipment in an early stage and to normalize a system in the early stage by time sequentially listing and displaying stored contents on a display device when a problem is produced. SOLUTION: An input data analysis part is provided with a function for storing the history of input data in a memory 9. For the history of the input data, a logic input unit and system time are paired and time sequentially stored. The length of the history can be arbitrarily set. When there is an input exceeding the set length, they are successively abandoned from the old input data and the latest ones are newly stored. The input data history is confirmed in the display means of a teach pendant 1 and a CRT display device, etc. That is, a finite number is time sequentially stored in a nonvolatile storage device inside the controller of an industrial robot and the stored contents are time sequentially listed and displayed on the display device when the problem is produced. Thus, an input signal or a data sequence, etc., which is the cause of producing the problem is retrieved and specified.</p> |
