Fujitec Co., Ltd.

Ryosuke Matsui

Tsutomu Takahama

Shunpei Yamaoka

The present invention provides an elevator encoder diagnostic system and an elevator encoder diagnostic method by which input and output ports are kept from being occupied, functional restriction is suppressed, and abnormalities and malfunctions occurring in encoders provided in a dual-system can be detected. The elevator encoder diagnostic system according to the present invention includes a first encodera and a second encoderb that are provided on a rotary portion of the elevator, a first diagnostic unita connected to the first encoder, and a second diagnostic unitb connected to the second encoder, a first determination unita and a second determination unitb that detect differences between encoder rotation amounts of the respective encoder systems and rotation detection signals of the other encoder systems, and, if a difference therebetween exceeds a predetermined threshold, determines that an abnormality has occurred.

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Hikone, Japan

Ryosuke Matsui