Sonbest Sm2130b-wt Rs485 Interface Water Immersion Sensor User Manual

SONBEST SM2130B-WT RS485 Interface Water Immersion Sensor

SM2130B-WT using the standard RS485 bus MODBUS-RTU protocol,easy access to PLC，DCS and other instruments or systems for monitoring flooding 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

Communication Protocol

The product uses RS485 MODBUS MODBUS-RTU standard protocol format, all operation or reply commands are hexade cimal data. The default device address is 1 when the device is shipped, the default baud rate is 9600, 8, n, 1

Read Data (Function id 0x03)
Inquiry frame (hexadecimal), sending example: Query 1# device 1 data, the host computer sends the comman d:01 03 00 00 00 01 84 0A .

For the correct query frame, the device will respond with data:01 03 02 00 79 79 A6 , the response format is parsed as follows

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

Data Address Table

read and modify device address

Read or query device address
If you don’t know the current device address and there is only one device on the bus, you ca n use the command FA 03 00 64 00 02 90 5F Query device address.

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 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:

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.

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 .

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:

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 .

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:

Chang e 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.

Read Correction Value

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.

In the r esponse 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 temperatur e, humidity have this parameter, the light generally does not have this item
first state quantity correction value register.

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 c ommand is:01 06 00 6B 00 64 F9 FD .

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 North east road,Baoshan District,Shanghai,China Web: http://www.sonbest.com
• Web: http://www.sonbus.com
• SKYPE: soobuu
• Email: [email protected]
• Tel: 86-021-51083595 / 66862055 / 66862075 / 66861077

References

• Home-上海搜博实业有限公司
• Home-SONBEST -SONBUS.COM| THE SENSOR COMPANY
• Home-SONBEST -SONBUS.COM| THE SENSOR COMPANY