Why do some registers seem to return unexpected values?

The ONOKOM HR-1-MB-B uses shared register addresses for different functions. For example, address 9 serves both ionization and horizontal vane control. Consult the ONOKOM gateway documentation to determine which function is active in your configuration.

What baud rate and parity settings should I use?

The default baud rate is 9600. Check the ONOKOM documentation for the correct parity setting (commonly 8N1) and ensure the ModbusCloud gateway RS-485 port matches these settings exactly.

Can I control multiple Haier AC units from one Modbus bus?

Yes, each ONOKOM HR-1-MB-B gateway must be assigned a unique Modbus slave address. You can then add multiple instances of this template in ModbusCloud, one per unit, each with the corresponding address.

The AC unit shows as disconnected in the dashboard. What should I check?

Verify the RS-485 wiring between the ONOKOM gateway and the ModbusCloud gateway. Confirm that the slave address in the template matches the address configured on the ONOKOM device. Also check that the ONOKOM gateway is properly connected to the Haier indoor unit.

Free Modbus template: ONOKOM AIR HR-1-MB-B

Name: ONOKOM AIR HR-1-MB-B
Brand: Onokom
SKU: 6cf14887-123c-4190-8270-22962f61f14b

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Free Modbus template: ONOKOM AIR HR-1-MB-B | ModbusCloud

Registers (17)

11 read / 14 write

Name	Address	Function	Type	Unit	Access
Indoor air temperature	3	FC03	uint16	°C	R
Outdoor air temperature	4	FC03	int16	°C	R
AC connected	20	FC01	uint16		R
Screen light (Status)	2	FC01	uint16		R/W
Beeper (Status)	5	FC01	uint16		R/W
Ionization (Status)	9	FC01	uint16		R/W
Self cleaning (Status)	10	FC01	uint16		R/W
Sleep mode (Status)	8	FC01	uint16		R/W
Vertical vanes (Status)	10	FC03	uint16		R/W
Turbo mode (Status)	7	FC02	uint16		R/W
Horizontal vanes (Status)	9	FC03	uint16		R/W
Active (Control)	1	FC05	uint16		W
Loxone modes (Control)	15	FC06	uint16		W
Smart fan speed	8	FC06	uint16		W
Target temperature	5	FC06	int16	°C	W
Vanes swing	11	FC06	uint16		W
Modbus address	128	FC06	uint16		W

ONOKOM AIR HR-1-MB-B

Overview

Key readings

Available commands

Use cases

Installation

Things to watch for

Registers (17)

Working with Modbus in your projects?

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