Product

Technical Parameters

Technical parameter	Parameter value
Brand	SONBEST
Temperature measurement range	-50℃ to +100℃ (optional with other ranges)
Detecting Core Devices	PT100
Temperature Measurement Accuracy	± 0.5℃ (0.5FS)
Thermal Response Coefficient	10mΩ/K
The resistance @ ℃	1000Ω±0.12Ω/K
The resistance rate	0.385Ω/K
Reference Standards	Using EN 60751 Class B Standards
Channels	8
Communication Interface	RS485
Default baud rate	9600 8 n 1
Power	DC9~24V 1A
Running temperature	-30~85℃
Working humidity	5%RH~90%RH

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Communication Protocol

    The product uses RS485 MODBUS-RTU standard protocol format, all operation or reply commands are hexadecimal data. The default device address is 1 when the device leaves the factory, and the module or NON-Recorder default baud rate is 9600,8,n,1 ,but data recorder default baud rate is 115200 .
1. Read data (function code 0x03)
    Inquiry frame (hexadecimal), sending example: query 1 data of 1# device, the upper computer sends the command: 01 03 00 00 00 08 44 0C .

Address	Function Code	Start Address	Data Length	Check Code
01	03	00 00	00 08	44 0C

    For the correct query frame, the device will respond with data: 01 03 10 00 88 00 00 00 00 00 00 00 00 00 00 00 00 00 00 6C 3F , response format:

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	Data 13	Data 14	Data 15	Data 16	Check Code	01	03	10	00 79
00 7A	00 7B	00 7C	00 7D	00 7E	00 7F	00 80	00 81	00 82	00 83	00 84	00 85
00 86	00 87	00 88	6C 3F

    Data description: The data in the command is hexadecimal, take data 1 as an example, 00 79 is converted to decimal value as 121, assuming the data magnification is 100, then the real value is 121/100=1.21, Others and so on.
2. Common data address table

Configuration Address	Register Address	Register Description	Data Type	Value Range
40001	00 00	temperature	Read Only	0~65535
40002	00 01	temperature	Read Only	0~65535
40003	00 02	temperature	Read Only	0~65535
40004	00 03	temperature	Read Only	0~65535
40005	00 04	temperature	Read Only	0~65535
40006	00 05	temperature	Read Only	0~65535
40007	00 06	temperature	Read Only	0~65535
40008	00 07	temperature	Read Only	0~65535
40009	00 08	temperature	Read Only	0~65535
40010	00 09	temperature	Read Only	0~65535
40011	00 0A	temperature	Read Only	0~65535
40012	00 0B	temperature	Read Only	0~65535
40013	00 0C	temperature	Read Only	0~65535
40014	00 0D	temperature	Read Only	0~65535
40015	00 0E	temperature	Read Only	0~65535
40016	00 F	temperature	Read Only	0~65535
40101	00 64	Model Code	Read/Write	0~65535
40102	00 65	total number of measuring points	read/write	1~20
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	1~4
40106	00 69	protocol type	read/write	1~10