1. Wiring diagram of FMR20.
2. After powering on, find the Smartblue software in the mobile phone to connect to FMR20, the user name is admin, and the password is the serial number. After logging in, click Settings to enter the basic settings. In the basic settings, you can set the distance unit, empty standard, full standard.
3. On the set interface, find the communication. Click in to set the parameters in Modbus. After setting up, turn off the Smartblue and Bluetooth together. Connect PC with RS485 port, use Modbus reading.
4.Modbus RS485 information, you can see in 8.1.2 that the register types are all holding registers.
5. Referring to the definition given in the specification, the Modbus address is shown in the following figure.
6. In connecting RS485, the most important thing is to find the port, through my computer, find the device manager. Look at how much COM the port is. If the address is not correct, it cannot be connected. The port on this side is COM6.
7. Find the Connection on the top of the program and click connect. We have already confirmed that our port is COM6. We are connected to COM6,Baud (baud rate):9600,Word data bit is 8, and Parit (check): no check. stop (stop bit):1 stop bit. We have already set these parameters in the Smartblue. The Modbus parameters set by the system can be seen in 4.
8. Then set according to the parameters shown in the figure, and you can see the data connected to RS485 in FMR20. Consistent with the data in the basic settings in the Smartblue.
