The Modbus interface is an application programming interface (API) for remote connection to AQT530 using the Modbus protocol.
By default, AQT530 outputs data in the Modbus RTU format.
AQT530 has a command line interface (CLI) and a Modbus interface:
- Modbus interface properties are configured over the CLI interface.
- All measurement values are available from both CLI and Modbus.
- All configuration parameters are available through CLI, while Modbus supports the most important configuration parameters.
Alternatively, AQT530 outputs data in ASCII CSV format over the RS-485 interface. ASCII CSV format uses the same physical channel as Modbus format, so only one format can be used at a time.
The CLI interface is for a local connection over RS-232.
| Property | Description/Value |
|---|---|
| Data output |
Modbus® ASCII, Modbus® RTU, ASCII CSV |
| Serial data interface | RS‑485 |
| Maintenance interface 1 | RS‑232 |
1 Recommended Vaisala USB
maintenance cable kit (253163SET).