What baud rate should I use for the ONOKOM AUX-1-MB-B?

The default baud rate is 9600. Make sure the serial port settings on your ModbusCloud gateway match this value exactly.

Can I have multiple ONOKOM gateways on the same RS-485 bus?

Yes. Each gateway must have a unique Modbus slave address. You can change the address by writing to register 128 on each unit.

Some registers seem to overlap for reading and writing. Is this a problem?

Certain addresses serve different functions depending on the operation. For example, register 10 reads vertical vane position but triggers self-cleaning when written. The template accounts for this, but avoid manual writes to shared addresses without consulting the register map.

The dashboard shows the AC unit as not connected. What should I check?

Verify the wiring between the ONOKOM gateway and the AUX indoor unit. Confirm the indoor unit is powered on. Also check that the RS-485 A and B lines to the ModbusCloud gateway are not swapped.

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

Name: ONOKOM AIR AUX-1-MB-B
Brand: Onokom
SKU: b6654fbd-2ba3-498c-bed0-9068fe0d1555

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

Registers (20)

13 read / 15 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
Mold protection (Status)	11	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
Current fan speed (Status)	32	FC03	uint16		R
Quiet mode (Status)	4	FC02	uint16		R
Turbo mode (Status)	7	FC02	uint16		R/W
Horizontal vanes	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
Modbus address (Service)	128	FC06	uint16		W
Quiet mode (Control)	5	FC05	uint16		W
Vanes swing	11	FC06	uint16		W

ONOKOM AIR AUX-1-MB-B

Overview

Key readings

Available commands

Use cases

Installation

Things to watch for

Registers (20)

Working with Modbus in your projects?

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