Product

  SM1000A using the standard ,easy access to PLC，DCS and other instruments or systems for monitoring temperaturex=64@1 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

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Technical parameter	Parameter value
Brand	SONBEST
Temperature measuring range	-50℃~120℃
Temperature measuring accuracy	±0.5℃ @25℃
Communication Interface	RS232
Default baud rate	9600 8 n 1
Power	DC9~24V 1A
Running temperature	-40~80°C
Working humidity	5%RH~90%RH

Wiring instructions

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    Any incorrect wiring can cause irreversible damage to the product. Please carefully wire the cable as follows in the case of power failure, and then connect the cable to confirm the correctness and then use it again.

ID	Core color	Identification	Note
1	Red	V+	Power V+
2	Green	V-	Power V-
3	Yellow	TX	RS232 TX
4	Blue	RX	RS232 RX

Communication Protocol

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    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 00 01 84 0A .

Device ID	Function id	Start Address	Data Length	CRC16
01	03	00 00	00 01	84 0A

    For the correct query frame, the device will respond with data:01 03 80 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 C7 FB , the response format is parsed as follows:

Device ID	Function id	Data Length	测点1	测点2
测点3	测点4	测点5	测点6	测点7
测点8	测点9	测点10	测点11	测点12
测点13	测点14	测点15	测点16	测点17
测点18	测点19	测点20	测点21	测点22
测点23	测点24	测点25	测点26	测点27
测点28	测点29	测点30	测点31	测点32
测点33	测点34	测点35	测点36	测点37
测点38	测点39	测点40	测点41	测点42
测点43	测点44	测点45	测点46	测点47
测点48	测点49	测点50	测点51	测点52
测点53	测点54	测点55	测点56	测点57
测点58	测点59	测点60	测点61	测点62
测点63	测点64	Check Code	01	03
80	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
C7 FB

    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	1CH1# Temperature deposit	Read only	0~65535
40259	01 02	1CH2# Temperature deposit	Read only	0~65535
......	.....	（1Omit)	...	...
40322	01 40	1CH64# Temperature deposit	Read only	0~65535
40514	02 01	2CH1# Temperature deposit	Read only	0~65535
40515	02 02	2CH2# Temperature deposit	Read only	0~65535
......	.....	（2Omit)	...	...
40578	02 40	2CH64 Temperature deposit	Read only	0~65535
----	----	Omit)	----	----
40258	03 01	1CH1# Temperature deposit	Read only	0~65535
40259	03 02	1CH2# Temperature deposit	Read only	0~65535
......	.....	（1Omit)	...	...
40322	03 40	1CH64# Temperature deposit	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	40107	00 6A	interval	read/write
0~36000

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.

Product Pictures

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