A02YYUW RS485 Message decoding

Does anyone have a manual or know how to decode A02YYUW (RS485 version) sensor message?

 

Here are the test messages I received from the RS485 output by holding a book in front of the sensor with different distances:

30 cm:

Request: 01 03 00 00 00 02 C4 0BResponse: 00 7F 5F 5F 00 

20 cm:

Request: 01 03 00 00 00 02 C4 0BResponse: 00 7F 21 21 00

 

10 cm:

Request: 01 03 00 00 00 02 C4 0BResponse: 00 FD FE 00

 

Please help!!!