Transmitters ordered with the Modbus configuration option are accessed using the Modbus serial communication protocol. The supported Modbus variant is Modbus RTU (Serial Modbus) over RS-485 interface.
The supported Modbus functions and registers are described in Modbus reference.
The following table lists the default Modbus serial communication settings of devices ordered with the Modbus configuration option.
| Description | Default Value |
|---|---|
| Serial bit rate | 19200 |
| Parity | N |
| Number of data bits | 8 |
| Number of stop bits | 2 |
| Modbus device address | 240 |
| Serial delay | 0 |
| Communication mode | Modbus RTU |
Use Vaisala Insight software to change the Modbus serial communication settings if needed. Download Insight software at www.vaisala.com/insight.