Q: The meter uses RS-485 RTU communication mode to communicate with the host computer. How does the host computer read the temperature and flow value in the meter? Are the values of the temperature and flow sent by different meters in the MODBUS protocol the same? A: 1) How does the host computer read the temperature and flow value in the meter?
The host computer communicates with the meter through a specific monitoring software or custom programming. Here’s how it can be done: 1. If using specialized monitoring software, the user simply needs to configure each device as a separate unit within the software. Once the station address is set, the data can be directly retrieved. This method is ideal for users who prefer a more straightforward, no-code approach. 2. For those who use high-level programming languages like .NET, Visual Studio, VB, VC, or Delphi, the Modbus protocol can be implemented manually. By using components such as MSComm or other serial communication libraries, developers can write their own code to read data from the meter. This method offers greater flexibility and customization but requires some programming knowledge. 2) Are the values of the temperature and flow sent by different meters in the MODBUS protocol the same?
This depends on the type and manufacturer of the meters. While the MODBUS protocol itself remains consistent across devices, the data addresses used to store temperature and flow values may vary between different instruments. For example, two meters from the same manufacturer might have similar data structures, but meters from different manufacturers could have completely different address mappings. Therefore, it's important to refer to the specific documentation of each device when implementing communication protocols. In summary, the MODBUS protocol is standardized, but the way data is stored and accessed can differ between devices. Always check the technical specifications of your equipment to ensure accurate data retrieval. Dash Cam,Car Dash Cam,Rove Dash Cam,No Screen Dash Cam SHENZHEN ROSOTO TECHNOLOGY CO., LTD. , https://www.rdtkdashcam.com