Modbus best practices for serial
The device’s serial connection must be wired correctly.
The Modbus slave devices must have communications wiring to the Modbus master.
Slave: for your meter to be a serial Modbus slave, the meter’s protocol must be set to Modbus RTU. Master and slave devices must use the same format.
Master: for your meter to be a serial Modbus master, the meter’s protocol must be set to Modbus Master.
|Baud rate||The baud rate must be the same for all devices on the serial Modbus network.|
|Stop bits and parity||
The communication stop bits and parity (for example, 8N1) must be the same for all devices on the serial Modbus network.
Each device on the serial Modbus network must have a unique unit ID (also called the device address).