Why do I see unexpected values when reading horizontal vane position or defrosting status?

Horizontal vane control and defrosting status share the same Modbus register address (9). Ensure your polling logic accounts for this overlap. Avoid writing to this address while simultaneously reading defrosting status.

What baud rate and serial settings should I use?

The default configuration is 9600 baud, 8 data bits, no parity, 1 stop bit (8N1). Both the ONOKOM gateway and the ModbusCloud gateway must use identical serial settings.

The AC connected status shows the unit as offline even though it is running. What should I check?

Verify the wiring between the ONOKOM TCL-6-MB-B and the TCL indoor unit. Also confirm that the Modbus slave address configured on the ONOKOM gateway matches the address set in the ModbusCloud template.

Can I control multiple TCL units with one ONOKOM gateway?

Each ONOKOM TCL-6-MB-B gateway typically interfaces with one TCL indoor unit. For multiple units, install one gateway per unit, assign unique Modbus slave addresses, and add a separate template instance in ModbusCloud for each.

Free Modbus template: ONOKOM AIR TCL-6-MB-B

Name: ONOKOM AIR TCL-6-MB-B
Brand: Onokom
SKU: 12854cc7-f132-4fd9-9ab3-eeed271267c9

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Free Modbus template: ONOKOM AIR TCL-6-MB-B | ModbusCloud

Registers (14)

9 read / 11 write

Name	Address	Function	Type	Unit	Access
Indoor air temperature	3	FC03	uint16	°C	R
AC connected (Status)	20	FC01	uint16		R
Defrosting (Status)	9	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
Indoor heat exchanger temperature (Status)	23	FC03	uint16	°C	R
Horizontal vanes	9	FC03	uint16		R/W
Vertical vanes	10	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

ONOKOM AIR TCL-6-MB-B

Overview

Key readings

Available commands

Use cases

Installation

Things to watch for

Registers (14)

Working with Modbus in your projects?

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