| 摘要 |
PROBLEM TO BE SOLVED: To identify an instruction location in path table operation when an alarm occurs in path table operation. SOLUTION: During path table operation, date and time information 30 at the time of sampling, a value 31 of a reference signal of which value varies, a position 32 of an axis controlled in synchronization with the reference signal, and information 33 on the state of the numerical controller are stored in a buffer 34 as operating history information for a predetermined time for each predetermined sampling cycle. The operating history information stored in the buffer 34 is stored in an operating history storing memory 36 when an alarm occurs. By displaying the operating history information stored in the operating history storing memory 36 in a display device 38, the location of the data instructed in path table operation, the state of the numerical controller and the position of the control axis when an alarm occurs can be specified. This facilitates investigation of the cause of the alarm occurrence. COPYRIGHT: (C)2009,JPO&INPIT
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