You MUST give each devicea unique address on the RS485 bus. Check the device manual for instructions.
Use lower addresses first (1, 2, ...) because the Sunlight GroupEMS will find them faster!
For each device, it is generally recommended to keep the factory-default baud rate, parity, and stop bits. The Sunlight GroupEMS will scan those first.
To configure RS485 communication on BMR energy meters, follow these steps:
Set the Modbus Address:
Access the settings menu by pressing the SET button for 5 seconds.
Navigate to the communication menu (P_2) using the cursor keys.
Set the Id (unique Modbus address) between 1 and 247.
Set the Baud Rate:
In the communication menu (P_2), configure the bd (baud rate) to match your system. Supported baud rates include 9.6 / 19.2 / 38.4 / 57.6 / 115 kBd.
Parity and Stop Bits:
Configure PAr (parity) as None, Odd, or Even.
Set the St (stop bits) to 1 or 2 as needed.
RS485 Termination:
If the meter is the last device on the RS485 bus, add a 120 Ω termination resistor.
Warning
NOTE: RS485 Device Addresses
You MUST give each devicea unique address on the RS485 bus. Check the device manual for instructions.
Use lower addresses first (1, 2, ...) because the Sunlight GroupEMS will find them faster!
For each device, it is generally recommended to keep the factory-default baud rate, parity, and stop bits. The Sunlight GroupEMS will scan those first.
