OPENING/CLOSING EQUIPMENT OPERATION DIAGNOSIS DEVICE

Japanese Patent JP3541921

B2

PROBLEM TO BE SOLVED: To obtain data close to the original waveform and to perform a highly advanced diagnosis by operating the maximum value and the duration of digital data sent from an external memory device to a programmable controller through a communication means as trend data and by judging the level of the trend data.
SOLUTION: When an opening/closing equipment is operated, a current flows in a control circuit 1 to be detected by a current detecting CT2. The detection signal is incorporated in a programmable controller(PC) 4 and an external memory device 5 via a signal converter 3 at a prescribed period. The PC4 operates the current conducting time of the received waveform data and the maximum value of the current by the data processing means of the digital data sent from the external memory device 5 via a communication means 8 and compares them with the preset normal region level. The PC4 judges the presence/absence of the abnormality in the waveform data, based on the comparison results, and stores the waveform data and the judgment results in a data memory means as trend data.

Koji Kondo

JP4962998A

July 14, 2004

March 02, 1998

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Mitsubishi Electric Corporation

H02B3/00; H01H33/00; (IPC1-7): H01H33/00; H02B3/00

JP61198070A
JP1212374A
JP9054707A
JP9103007A
JP3084481A
JP62264524A
JP1223367A
JP64072433A
JP54139044A
JP7262866A
JP749362A
JP6260062A
JP62141905A
JP11164420A
JP6205509A
JP5300615A
JP4190643A
JP295129A
JP6258826A

Michiteru Soga
Yoshio Kobayashi
Yutaka Ikeya
Hidetoshi Furukawa
Suzuki Kenchi
Masahisa Hase
Tetsuo Kuroiwa

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