SONBEST SM1800C CAN Bus Rail Type Temperature Sensor User Manual
- June 6, 2024
- SONBEST
Table of Contents
SM1800C CAN Bus Rail Type Temperature Sensor
User Manual
SM1800C using the standard CAN Bus, easy access to PLC， DCS, and other instruments or systems for monitoring temperature 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℃ |
| Communication Interface | CAN |
| Default rate | 50kbps |
| Power | DC6~24V 1A |
| Running temperature | -40~80°C |
| Working humidity | 5%RH~90%RH |
Product Size
How to wiring?
Note: When wiring, first connect the positive and negative poles of the power supply and then connect the signal line
Application solution
**
**How to
use?
Communication
Protocol
The product uses the CAN2.0B standard frame format. The standard frame
information is 11 bytes, including two parts of information and the first 3
bytes of the data part are the information part. The default node number is 1
when the device leaves the factory, which means The text identification code
is ID.10-ID.3 in the CAN standard frame, and the default rate is 50k. If other
rates are required, they can be modified according to the communication
protocol.
The device can directly work with various CAN converters or USB acquisition
modules. Users can also choose our industrial-grade USB-CAN converters (as
shown in the figure above). The basic format and
composition of the standard frame is as follows As shown in the table.
| 位 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|---|---|---|---|---|---|---|---|---|
| Byte 1 | FF | FTR | X | X | DLC.3 | DLC.2 | DLC.1 | DLC.0 |
| Byte 2 | ID.10 | ID.9 | ID.8 | ID.7 | ID.6 | ID.5 | ID.4 | ID.3 |
| Byte 3 | ID.2 | ID.1 | ID.O | x | x | x | x | x |
| Byte 4 | d1.7 | d1.6 | d1.5 | d1.4 | d1.3 | d1.2 | d1.1 | d1.0 |
| Byte 5 | d2.7 | d2.6 | d2.5 | d2.4 | d2.3 | d2.2 | d2.1 | d2.0 |
| Byte 6 | d3.7 | d3.6 | d3.5 | d3.4 | d3.3 | d3.2 | d3.1 | d3.0 |
| Byte 7 | d4.7 | d4.6 | d4.5 | d4.4 | d4.3 | d4.2 | d4.1 | d4.0 |
| Byte 11 | d8.7 | d8.6 | d8.5 | d8.4 | d8.3 | d8.2 | d8.1 | d8.0 |
Byte 1 is the frame information. The 7th bit (FF) indicates the frame format, in the extended frame, FF=1; the 6th bit (RTR) indicates the type of the frame, RTR=0 indicates the data frame, RTR=1 means the remote frame; DLC means the actual data length in the data frame. Bytes 2~3 are valid for 11 bits of the message identification code. Bytes 4~11 are the actual data of the data frame, invalid for the remote frame. For example, when the hardware address is 1, as shown in the figure below, the frame ID is 00 00 00 01, and the data can be responded to by sending the correct command.
- Query data Example: To query all 2 data of 1# device channel 1, the host computer sends the command: 01 03 00 00 00 01.
Frame type| CAN frame ID| mapping address| function code| starting address| data length
---|---|---|---|---|---
00 01| 01| 01| 03| 00 00| 01
Response frame: 01 03 02 09 EC.
In the query response of the above example: 0x03 is the command number, 0x2 has 2 data, the first data is 09 EC converted into the decimal system: 2540, because the module resolution is 0.01, this The value needs to be divided by 100, that is, the actual value is 25.4 degrees. If it is greater than 32768, it is a negative number, then the current value is reduced to 65536 and then 100 is the true value.
- Change Frame ID
You can use the master station to reset the node number by command. The node number ranges from 1 to 200. After resetting the node number, you must reset the system. Because the communication is in hexadecimal format, the data in the table Both are in hexadecimal format.
For example, if the host ID is 00 00 and the sensor address is 00 01, the current node 1 is changed to the 2nd. The communication message for changing the device ID is as follows: 01 06 0B 00 00 02.
| Frame type | Frame ID | Set Address | Function id | fixed value | target frame ID |
|---|---|---|---|---|---|
| Command | 00 01 | 01 | 06 | 0B 00 | 00 02 |
Return frame after correct setting: 01 06 01 02 61 88. The format is as shown in the table below.
| Frame ID | Set Address | Function id | source frame ID | current frame ID | CRC16 |
|---|---|---|---|---|---|
| 00 00 | 01 | 06 | 01 | 02 | 61 88 |
The command will not respond correctly. The following is the command and reply message to change the Set Address to 2.
- Change device rate
You can use the master station to reset the device rate through commands. The range of the rate number is 1~15. After resetting the node number, the rate will take effect immediately. Because the communication is in hexadecimal format, the rate in the table The numbers are in hexadecimal format.
| Rate value | actual rate | rate value | actual rate |
|---|---|---|---|
| 1 | 20kbps | 2 | 25kbps |
| 3 | 40kbps | 4 | 50kbps |
| 5 | 100kbps | 6 | 125kbps |
| 7 | 200kbps | 8 | 250kbps |
| 9 | 400kbps | A | 500kbps |
| B | 800kbps | C | 1M |
| D | 33.33kbps | E | 66.66kbps |
The rate not in the above range is not currently supported. If you have
special requirements, you can customize them. For example, the device rate is
250k, and the number is 08 according to the above table. To change the rate to
40k, the number of 40k is 03, the operation communication message is as
follows: 01 06 00 67 00 03 78 14, as shown in the figure below.
After the rate modification is performed, the rate will change immediately,
and the device will not return any value. At this time, the CAN acquisition
device also needs to switch the corresponding rate to communicate normally.
- Return frame ID and rate after power-on
After the device is powered on again, the device will return the corresponding device address and rate
information. For example, after the device is powered on, the reported message is as follows: 01 25 01 05 D1 8Frame ID| device address| function code| current frame ID| current rate| CRC16
---|---|---|---|---|---
0| 01| 25| 00 01| 05| D1 80
In the response frame, 01 indicates that the current frame ID is 00 01, and
the speed rate value 05
indicates that the current rate is 50 kbps, which can be obtained by looking
up the table.
Disclaimer
This document provides all information about the product, does not grant any license to intellectual property, does not express or imply, and prohibits any other means of granting any intellectual property rights, such as the statement of sales terms and conditions of this product, other issues. No liability is assumed. Furthermore, our company makes no warranties, express or implied, regarding the sale and use of this product, including the suitability for the specific use of the product, the marketability, or the infringement liability for any patent, copyright, or other intellectual property rights, etc. Product specifications and product descriptions may be modified at any time without notice.
Contact Us
Company: Shanghai Sonbest Industrial Co., Ltd
Address: Building 8, No.215 Northeast Road, Baoshan District, Shanghai,China
Web: http://www.sonbest.com
Web: http://www.sonbus.com
SKYPE: soobuu
Email: [email protected]
Sha nghai Sonbest Industrial Co., Ltd
Tel: 86-021-51083595 / 66862055 / 66862075 / 66861077
References
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