This document describes the Modbus protocol of Exhausto Air 2.
This document explains how to configure and use the Modbus protocol for the Exhausto AIR 2 unit. It covers communication via TCP/IP and RS485, supported function codes, discrete inputs/outputs, and register addresses for reading and writing data. The manual includes detailed tables for discrete outputs, discrete inputs, input registers, and holding registers with their addresses and functions.
| Modbus RTU Baud Rate | 9600 |
|---|---|
| Data Bits | 8 |
| Stop Bits | 1 |
| Modbus TCP/IP Interface | 10/100Mbit Ethernet, RJ45 |
The OJ Air2 supports function codes 01 to 16, including Read Coil Status, Read Input Status, Read Holding Registers, Read Input Registers, Force Single Coil, Preset Single Registers, Diagnostics.Sub-funktion 00, Force Multiple Coils, and Preset Multiple Registers.
Standard Modbus RTU parameters include 9600 baud rate, no parity, 8 data bits, 1 start bit, and 1 stop bit.
The default baud rate for Modbus RS485 is 9600, but it can be adjusted via web server or hand terminal.