SAFETY SENSOR AND METHOD FOR DETECTING ABNORMALITY IN SAFETY SENSOR

WIPO Patent Application WO/2011/013511

A1

Disclosed is a safety sensor provided with a plurality of input signal lines for inputting signals for setting. Specifically disclosed is a safety sensor wherein at least one input signal line (signal line Q3) is provided with a high-level detection circuit (201) and a low-level detection circuit (202). In an initialization process wherein setting of an operation mode is permitted, a CPU (203) registers in a memory (204) the on-off states of detection signals from the respective detection circuits (201, 202) on condition that the on-off states of detection signals are mutually opposite, and the CPU (203) identifies the connection state of the input signal line (Q3) on the basis of the on-off states and sets an operation mode corresponding to the connection state. After setting the operation mode is completed, the CPU (203) monitors the detection signals from the respective detection circuits (201, 202) and determines, when at least either of the detection signals comes into a state different from the states registered in the memory (204), occurrence of abnormality in the connection state of the input signal line (Q3).

OSAKO Kazunori (801 Minamifudodo-cho, Horikawahigashiiru, Shiokoji-dori, Shimogyo-Ku, Kyoto-sh, Kyoto 30, 〒6008530, JP)

JP2010/061853

February 03, 2011

July 13, 2010

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OMRON CORPORATION (801 Minamifudodo-cho, Horikawahigashiiru Shiokoji-dori, Shimogyo-Ku, Kyoto-sh, Kyoto 30, 〒6008530, JP)
オムロン株式会社 (〒30 京都府京都市下京区塩小路通堀川東入南不動堂町８０１番地 Kyoto, 〒6008530, JP)

G01V8/20; G08B21/02; H01H35/00

SUZUKI Yoshimitsu et al. (Honmachi Terada Building 6th Floor, 5-31 Kyutaromachi 2-chome, Chuo-Ku, Osaka-sh, Osaka 56, 〒5410056, JP)

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