Title:
MONITORING DEVICE, MONITORING SYSTEM, AND MONITORING METHOD FOR RELAY OUTPUT SIGNAL
Document Type and Number:
WIPO Patent Application WO/2022/219708
Kind Code:
A1
Abstract:
Provided is a monitoring device for monitoring an abnormality in number of times of repetition of opening/closing of an output signal of a relay, and identifying a cause of the abnormality if the abnormality in number of times of repetition of opening/closing of the output signal of the relay is detected. This monitoring device comprises an output signal monitoring unit that monitors an abnormality in number of times of repetition of opening/closing of an output signal of a relay, and a cause identification unit that identifies a cause on the basis of periodicity of repetition of opening/closing if the output signal monitoring unit has detected an abnormality in number of times of repetition of opening/closing. The relay is opened/closed on the basis of a control signal received from a numerical control device, and the cause identification unit may determine occurrence of an abnormality in the control signal if periodicity of repetition of opening/closing is detected.
Inventors:
KUROKAWA YUUKI (JP)
Application Number:
PCT/JP2021/015287
Publication Date:
October 20, 2022
Filing Date:
April 13, 2021
Export Citation:
Assignee:
FANUC CORP (JP)
International Classes:
G05B23/02; G01R31/00; G05B19/05
Foreign References:
| JP2017187878A | 2017-10-12 | |||
| JP2009025141A | 2009-02-05 | |||
| JP2012195322A | 2012-10-11 | |||
| JP2015217911A | 2015-12-07 | |||
| JP2018095022A | 2018-06-21 |
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
Download PDF: