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Technical Parameters

Technical parameter	Parameter value
Brand	SONBEST
Wind speed range	0~30m/s
Start wind	0.2m/s
Wind speed accuracy	±3%
Communication Interface	RS485
Default baud rate	9600 8 n 1
Power	DC9~24V 1A
Running temperature	-30~80℃
Working humidity	5%RH~90%RH

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Communication Protocol

    The product uses the RS485 MODBUS-RTU standard protocol format, and all operation or reply commands are in hexadecimal data. When the device leaves the factory, the default device address is 1, and the default baud rate is: for modules and non-recording instruments: 9600, 8, n, 1 (for the recorder series products, the default is: 115200, 8, n, 1).
1. Read data (Function code 0x03)
    The inquiry frame (in hexadecimal). Example of sending: To query 1 piece of data of device No. 1, the host computer sends the command: 01 03 00 00 00 0C 45 CF .

Address	Function code	Starting address	Data length	Checksum
01	03	00 00	00 0C	45 CF

    For a correct inquiry frame, the device will respond with data: 01 03 18 02 23 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 1B 62 , and the response format is:

Address

Function code

Length

Data 1

Data 2

Data 3

Data 4

Data 5

Data 6

Data 7

Data 8

Data 9

Data 10

Data 11

Data 12

Checksum

01

03

18

02 18

02 19

02 1A

02 1B

02 1C

02 1D

02 1E

02 1F

02 20

02 21

02 22

02 23

1B 62

    Data description: The data in the command is in hexadecimal. Taking Data 1 as an example, 02 18 converted to decimal value is 536. Assuming the data magnification factor is 100, then the true value is 536/100 = 5.36, and the others can be deduced by analogy.
2. Common Data Address Table

Configuration Address	Register Address	Register Description	Data Type	Value Range
40001	00 00	wind speed	Read Only	0~65535
40002	00 01	wind speed	Read Only	0~65535
40003	00 02	wind speed	Read Only	0~65535
40004	00 03	wind speed	Read Only	0~65535
40005	00 04	wind speed	Read Only	0~65535
40006	00 05	wind speed	Read Only	0~65535
40007	00 06	wind speed	Read Only	0~65535
40008	00 07	wind speed	Read Only	0~65535
40009	00 08	wind speed	Read Only	0~65535
40010	00 09	wind speed	Read Only	0~65535
40011	00 0A	wind speed	Read Only	0~65535
40012	00 0B	wind speed	Read Only	0~65535
40101	00 64	Model Code	Read-only	0~59999
40102	00 65	Total Number of Measuring Points	Read-only	1~1600
40103	00 66	Device Address	Read/Write	1~249
40104	00 67	Baud Rate	Read/Write	0~6
40105	00 68	Communication Mode	Read/Write	1 Query
2 Active Upload	40106	00 69	Protocol Type	Read/Write
1 MODBUS-RTU	Others Unused