Interface overview - AQT530

AQT530 Configuration Guide

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User guide

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.

Table 1. AQT530 data connection specifications
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).