Vaisala AQT530, Configuration Manual

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3. Configuration
3.1 Interface overview
AQT530 has a command line interface (CLI) and a Modbus interface.
• Modbus interface configuration is done over the CLI interface.
• All measurement values are available from both CLI and Modbus.
• Linear correction can be done over both CLI and Modbus interface.
• Some read-only parameters are available only in CLI interface.
In addition, AQT530 outputs data over the Modbus interface or in ASCII CSV format over the
RS-485 interface.
The CLI interface is for a local connection over RS-232.
The Modbus interface is an application programming interface (API) for remote connection
to AQT530 using the Modbus protocol.
More information
‣ Overview of CLI commands and parameters (page 28)
‣
Modbus register addresses for AQT530 (page 45)
‣
ASCII CSV data message (page 22)
3.2 Configuration overview
You can do the operations listed in the following table using a local connection with CLI
commands and/or remotely over the Modbus interface.
Table 4 Overview of configuration operations
Action CLI command and
parameter CLI reference Modbus register
addresses
View measurement data
meas
Printing measurements
and changing
measurement output unit
( meas command)
(page 32)
• 0x0000 ... 0x000C
(gas values in ppb with
linear correction)
• 0x0066 ... 0x006B
(gas values in ug/m
3
)
• 0x006C ... 0x0075
(gas values in ppb
without linear
correction)
Configure Modbus
interface
set
• rs485_mode
• rs485_addr
• rs485_baud
• rs485_databits
• rs485_parity
• rs485_stopbits
Configuring Modbus
interface (page 20) −
AQT530 Configuration Guide M212572EN-C
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