Which parity setting should I use for the Samsung MIM-B19N module?

Set the parity to even (1) at 9600 baud. This matches the default configuration of the MIM-B19N and MIM-B19NT modules. A mismatch will cause communication timeouts.

What are the registers in the 6000 to 7007 range used for?

These registers are used to configure Modbus slave IDs for various sensor readings. They do not directly control heat pump functions. Set them correctly to ensure sensor values are mapped to the right data points.

My heat pump shows online but write commands have no effect. What should I check?

Confirm that the MIM-B19N or MIM-B19NT firmware is up to date. Also verify that the heat pump is not locked to local control only. Some Samsung models require enabling external control through the unit's service menu.

Can I use this template with Modbus TCP instead of RTU?

The Samsung MIM-B19N and MIM-B19NT modules communicate via Modbus RTU only. If your gateway supports RTU to TCP conversion, the template will still work, but the physical connection to the module must be serial RS-485.

Free Modbus template: Samsung Heating & Cooling

Name: Samsung Heating & Cooling
Brand: Samsung
SKU: a019806a-4660-4fbe-b54c-a4b23e478f26

Try the demo Shop

Free Modbus template: Samsung Heating & Cooling | ModbusCloud

Registers (27)

18 read / 18 write

Name	Address	Function	Type	Unit	Access
State Heatpump	52	FC04	uint16		R/W
State Supply flow target temperature HC1	68	FC04	uint16	°C	R/W
State Room target temperature HC1	59	FC03	uint16	º C	R
State Heatpump mode	53	FC03	uint16		R/W
Actual Hot water temperature	75	FC03	int16	°C	R
State Hot water target temperature	74	FC04	uint16	°C	R/W
Actual Outside temperature	5	FC03	int16	°C	R
State Hot water operation mode	73	FC03	uint16		R/W
State Hot water operation	72	FC03	uint16		R/W
Actual Back flow temperature	65	FC03	uint16	° C	R
Actual Supply flow temperature HC1	66	FC03	uint16	°C	R
State Switching valve	89	FC03	uint16		R
State Backup Heater	86	FC03	uint16		R
State Booster Heater	85	FC03	uint16		R
Actual Water flow l/m	87	FC03	uint16	l/m	R
State Supply flow target temperature HC2	83	FC04	uint16	°C	R/W
State operation HC2	82	FC03	uint16		R/W
State Room target temperature HC2	84	FC04	uint16	°C	R/W
Set ID Outside Temperature	6001	FC16	uint16		W
Set ID Compressor Frequency	6000	FC16	uint16		W
Set ID Operation HC2	7000	FC16	uint16		W
Set ID Target Supply Flow temperature HC2	7001	FC16	uint16		W
Set ID Target Room temperature HC2	7002	FC16	uint16		W
Set ID Additional Heater Hot Water	7003	FC16	uint16		W
Set ID Additional Heater Heat/Cool Buffer	7004	FC16	uint16		W
Set ID Flow Rate	7005	FC16	uint16		W
Set ID Switching Valve	7007	FC16	uint16		W

Samsung Heating & Cooling

Overview

Key readings

Available commands

Use cases

Installation

Things to watch for

Registers (27)

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