No public register map is available. How do I know which registers to use?

The template ships with an example project (v1.0.1) that contains a working register configuration. Use this as your starting point and adjust if your Chigo unit model or ONOKOM firmware version differs.

What baud rate and parity settings should I use for the RS-485 connection?

The default settings for most ONOKOM gateways are 9600 baud, 8 data bits, 1 stop bit, and no parity (9600 8N1). Confirm this in the ONOKOM device documentation before commissioning.

Can I control multiple indoor units with a single ONOKOM CG-VRF-MB-B gateway?

Yes. The CG-VRF-MB-B can address multiple Chigo indoor units on the same VRF bus. Each unit is typically mapped to a different set of Modbus registers or a different slave address depending on the ONOKOM configuration.

The template shows Modbus TCP but the gateway uses Modbus RTU. Is there a conflict?

The ModbusCloud platform handles protocol conversion internally. Your MCG or MLP gateway communicates with the ONOKOM device over RS-485 using Modbus RTU, while the cloud connection uses TCP. No additional converter is needed.

Free Modbus template: ONOKOM AIR CG-VRF-MB-B

Name: ONOKOM AIR CG-VRF-MB-B
Brand: Onokom
SKU: e98239e1-6699-41a2-9eb5-465a7c1072c2

This template connects Chigo air conditioners to the ModbusCloud platform via the ONOKOM CG-VRF-MB-B gateway over Modbus RTU. It enables remote monitoring and control of supported Chigo VRF and split air conditioning units through a cloud dashboard.

ONOKOM AIR CG-VRF-MB-B

Overview

Use cases

Installation

Things to watch for

Working with Modbus in your projects?

Question about your setup?

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