Product

  ST1200B using the standard TCP/IP Network Interface,easy access to PLC，DCS and other instruments or systems for monitoring temperaturex=100@10 state quantities.The internal use of high-precision sensing core and related devices to ensure high reliability and excellent long-term stability,can be customized RS232,RS485,CAN,4-20mA,DC0~5V/10V,ZIGBEE,Lora,WIFI,GPRS and other output methods.

Technical Parameters

Technical parameter	Parameter value
Brand	SONBEST
Temperature measuring range	-50℃~120℃
Temperature measuring accuracy	±0.5℃ @25℃
Support sensors	1000
Channels	10
Max Sensors of channel	100
Support sensor	sensor of DS18B20
Communication Interface	TCP/IP
Power	DC9~24V 1A
Running temperature	-40~80°C
Working humidity	5%RH~90%RH

Product Size

How to wiring?

Why choose this product?

Application solution

How to use?

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 is shipped, the default baud rate is 9600, 8, n, 1
1. Read Data (Function id 0x03)
    Inquiry frame (hexadecimal), sending example: Query 1# device 1 data, the host computer sends the command:01 03 00 00 03 E8 45 74 .

Device ID	Function id	Start Address	Data Length	CRC16
01	03	00 00	03 E8	45 74

    For the correct query frame, the device will respond with data:01 03 C8 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 00 89 00 8A 00 8B 00 8C 00 8D 00 8E 00 8F 00 90 00 91 00 92 00 93 00 94 00 95 00 96 00 97 00 98 00 99 00 9A 00 9B 00 9C 00 9D 00 9E 00 9F 00 A0 00 A1 00 A2 00 A3 00 A4 00 A5 00 A6 00 A7 00 A8 00 A9 00 AA 00 AB 00 AC 00 AD 00 AE 00 AF 00 B0 00 B1 00 B2 00 B3 00 B4 00 B5 00 B6 00 B7 00 B8 00 B9 00 BA 00 BB 00 BC 00 BD 00 BE 00 BF 00 C0 00 C1 00 C2 00 C3 00 C4 00 C5 00 C6 00 C7 00 C8 00 C9 00 CA 00 CB 00 CC 00 CD 00 CE 00 CF 00 D0 00 D1 00 D2 00 D3 00 D4 00 D5 00 D6 00 D7 00 D8 00 D9 00 DA 00 DB 00 DC 5E F6 , the response format is parsed as follows:

Device ID

Function id

Data Length

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Check Code

01

03

C8

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

00 89

00 8A

00 8B

00 8C

00 8D

00 8E

00 8F

00 90

00 91

00 92

00 93

00 94

00 95

00 96

00 97

00 98

00 99

00 9A

00 9B

00 9C

00 9D

00 9E

00 9F

00 A0

00 A1

00 A2

00 A3

00 A4

00 A5

00 A6

00 A7

00 A8

00 A9

00 AA

00 AB

00 AC

00 AD

00 AE

00 AF

00 B0

00 B1

00 B2

00 B3

00 B4

00 B5

00 B6

00 B7

00 B8

00 B9

00 BA

00 BB

00 BC

00 BD

00 BE

00 BF

00 C0

00 C1

00 C2

00 C3

00 C4

00 C5

00 C6

00 C7

00 C8

00 C9

00 CA

00 CB

00 CC

00 CD

00 CE

00 CF

00 D0

00 D1

00 D2

00 D3

00 D4

00 D5

00 D6

00 D7

00 D8

00 D9

00 DA

00 DB

00 DC

5E F6

    Data Description: The data in the command is hexadecimal. Take data 1 as an example. 00 79 is converted to a decimal value of 121. If the data magnification is 100, the actual value is 121/100=1.21. Others and so on.
2. Data Address Table

Address	Start Address	Description	Data type	Value range
40258	01 01	1CH 1#PTemperature	Read Only	0~65535
40259	01 02	1CH 2#PTemperature	Read Only	0~65535
......	.....	（1 Omission of mid-channel measurement points)	...	...
40358	01 64	1CH 100#PTemperature	Read Only	0~65535
40514	02 01	2CH 1#PTemperature	Read Only	0~65535
40515	02 02	2CH 2#PTemperature	Read Only	0~65535
......	.....	（2 Omission of mid-channel measurement points)	...	...
40614	02 64	2CH 100#PTemperature	Read Only	0~65535
----	----	Middle channel omitted )	----	----
42562	03 01	10CH 1#PTemperature	Read Only	0~65535
42563	03 02	10CH 2#PTemperature	Read Only	0~65535
......	.....	（10 Omission of mid-channel measurement points)	...	...
42662	03 64	10CH 100#PTemperature	Read Only	0~65535
	40101	00 64	model code	read/write
0~65535	40102	00 65	total points	read/write
1~20	40103	00 66	Device ID	read/write
1~249	40104	00 67	baud rate	read/write
0~6	40105	00 68	mode	read/write
1~4	40106	00 69	protocol	read/write
1~10

3 read and modify device address
(1) Read or query device address
    If you don"t know the current device address and there is only one device on the bus, you can use the command FA 03 00 64 00 02 90 5F Query device address.

Device ID	Function id	Start Address	Data Length	CRC16
FA	03	00 64	00 02	90 5F

    FA is 250 for the general address. When you don"t know the address, you can use 250 to get the real device address, 00 64 is the device model register.
    For the correct query command, the device will respond, for example the response data is: 01 03 02 07 12 3A 79, the format of which is as shown in the following table:

Device ID	Function id	Start Address	Model Code	CRC16
01	03	02	55 3C 00 01	3A 79

    Response should be in the data, the first byte 01 indicates that the real address of the current device is, 55 3C converted to decimal 20182 indicates that the current device main model is 21820, the last two bytes 00 01 Indicates that the device has a status quantity.
(2)Change device address
    For example, if the current device address is 1, we want to change to 02, the command is:01 06 00 66 00 02 E8 14 .

Device ID	Function id	Start Address	Destination	CRC16
01	06	00 66	00 02	E8 14

    After the change is successful, the device will return information: 02 06 00 66 00 02 E8 27 , its format is parsed as shown in the following table:

Device ID	Function id	Start Address	Destination	CRC16
01	06	00 66	00 02	E8 27

    Response should be in the data, after the modification is successful, the first byte is the new device address. After the general device address is changed, it will take effect immediately. At this time, the user needs to change the query command of the software at the same time.
4 Read and Modify Baud Rate
(1) Read baud rate
    The device default factory baud rate is 9600. If you need to change it, you can change it according to the following table and the corresponding communication protocol. For example, read the current device"s baud rate ID, the command is:01 03 00 67 00 01 35 D5 , its format is parsed as follows.

Device ID	Function id	Start Address	Data Length	CRC16
01	03	00 67	00 01	35 D5

    Read the baud rate encoding of the current device. Baud rate encoding: 1 is 2400; 2 is 4800; 3 is 9600; 4 is 19200; 5 is 38400; 6 is 115200.
    For the correct query command, the device will respond, for example the response data is: 01 03 02 00 03 F8 45, the format of which is as shown in the following table:

Device ID	Function id	Data Length	Rate ID	CRC16
01	03	02	00 03	F8 45

    coded according to baud rate, 03 is 9600, ie the current device has a baud rate of 9600.
(2)Change the baud rate
    For example, changing the baud rate from 9600 to 38400, ie changing the code from 3 to 5, the command is: 01 06 00 67 00 05 F8 1601 03 00 66 00 01 64 15 .

Device ID	Function id	Start Address	Target Baud Rate	CRC16
01	03	00 66	00 01	64 15

    Change the baud rate from 9600 to 38400, changing the code from 3 to 5. The new baud rate will take effect immediately, at which point the device will lose its response and the baud rate of the device should be queried accordingly. Modified.
5 Read Correction Value
(1) Read Correction Value
    When there is an error between the data and the reference standard, we can reduce the display error by adjusting the correction value. The correction difference can be modified to be plus or minus 1000, that is, the value range is 0-1000 or 64535 -65535. For example, when the display value is too small, we can correct it by adding 100. The command is: 01 03 00 6B 00 01 F5 D6 . In the command 100 is hex 0x64 If you need to reduce, you can set a negative value, such as -100, corresponding to the hexadecimal value of FF 9C, which is calculated as 100-65535=65435, and then converted to hexadecimal to 0x FF 9C. The correction value starts from 00 6B. We take the first parameter as an example. The correction value is read and modified in the same way for multiple parameters.

Device ID	Function id	Start Address	Data Length	CRC16
01	03	00 6B	00 01	F5 D6

    For the correct query command, the device will respond, for example the response data is: 01 03 02 00 64 B9 AF, the format of which is as shown in the following table:

Device ID	Function id	Data Length	Data value	CRC16
01	03	02	00 64	B9 AF

    In the response data, the first byte 01 indicates the real address of the current device, and 00 6B is the first state quantity correction value register. If the device has multiple parameters, other parameters operate in this way. The same, the general temperature, humidity have this parameter, the light generally does not have this item.
(2)Change correction value
    For example, the current state quantity is too small, we want to add 1 to its true value, and the current value plus 100 correction operation command is:01 06 00 6B 00 64 F9 FD .

Device ID	Function id	Start Address	Destination	CRC16
01	06	00 6B	00 64	F9 FD

    After the operation is successful, the device will return information: 01 06 00 6B 00 64 F9 FD, the parameters take effect immediately after successful change.

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