Why do some registers seem to return unexpected values?

Some register addresses are shared between different functions, such as address 4 for outdoor air temperature and quiet mode. The template uses specific function codes to distinguish read and write operations. Make sure you have not manually altered the function code assignments in the template.

The gateway shows no data or the AC connected status is false. What should I check?

Verify the wiring between the ONOKOM TCL-1-MB-B and the TCL indoor unit. Ensure the unit is powered on and that the communication cable is seated correctly on both ends. Check that the TCL model is supported by the TCL-1-MB-B gateway.

What baud rate should I use?

The default baud rate for the ONOKOM TCL-1-MB-B is 9600. Make sure both the gateway and the ModbusCloud gateway RS-485 port are configured to 9600 baud, 8 data bits, no parity, 1 stop bit (8N1).

Can I control multiple TCL units from one ModbusCloud gateway?

Yes. Connect each ONOKOM TCL-1-MB-B on the same RS-485 bus with a unique Modbus slave address. Import a separate template instance for each unit and assign the matching address in the ModbusCloud portal.

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

Name: ONOKOM AIR TCL-1-MB-B
Brand: Onokom
SKU: 86af72fa-74ea-450f-b4cb-f02e41e94ad9

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

Registers (28)

22 read / 19 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 (Status)	20	FC01	uint16		R
Screen light (Status)	2	FC01	uint16		R/W
Heating 8 deg (Status)	13	FC01	uint16		R/W
Beeper (Status)	5	FC01	uint16		R/W
Gentle wind (Status)	14	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
Quiet mode (Status)	4	FC01	uint16		R/W
Turbo mode (Status)	7	FC01	uint16		R/W
Eco mode (Status)	6	FC01	uint16		R/W
Vertical vanes (Status)	11	FC03	uint16		R/W
Outdoor heat exchanger temperature (Status)	24	FC03	uint16	°C	R
Indoor heat exchanger temperature (Status)	23	FC03	uint16	°C	R
Current fan speed (Status)	32	FC03	uint16		R
Error count	0	FC04	uint16		R
Last error code	1	FC04	uint16		R
Error count	0	FC02	uint16	count	R
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
Vertical vanes (Control)	10	FC06	uint16		W

ONOKOM AIR TCL-1-MB-B

Overview

Key readings

Available commands

Use cases

Installation

Things to watch for

Registers (28)

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