Why do I see zero or incorrect values for total thermal power or compressor starts?

These registers (e.g. addresses 1575, 1577, 1083) are 32-bit values spanning two consecutive Modbus registers. Ensure the template is configured to read them as 32-bit integers rather than single 16-bit registers.

Can I use this template for Nibe F-Series or Greenline models?

No. The register maps differ significantly between the F-Series, S-Series, and Greenline product families. Use the dedicated F-Series or Greenline template for those models.

How do I find the correct Modbus TCP port and IP address on the heat pump?

Navigate to menu 7.5.9 Modbus TCP/IP on the heat pump HMI display. The IP address and port (typically 502) are shown there. Make sure the gateway and heat pump are on the same subnet.

Do I need an external Modbus gateway module to connect the S-Series?

No. The Nibe S-Series and SMO S40 controller have a built-in Modbus TCP interface. You connect the ModbusCloud gateway directly over Ethernet without any additional hardware.

Free Modbus template: Nibe (KNV) Heating & Cooling (S-Series)

Template for Nibe (KNV) S-Series heat pumps via Modbus TCP. Reads temperatures, compressor data, thermal and electrical energy, and operating hours. Controls heating/cooling modes, supply flow setpoints, hot water demand, and curve offsets.

Registers (42)

40 read / 8 write

Name	Address	Function	Type	Unit	Access
Actual Outdoor temperature [BT1]	•••	•••	•••	°C	R
Actual Hot Water Bottom temperature [BT6]	•••	•••	•••	°C	R
Acutal Supply Flowtemperature HC1 [BT2]	•••	•••	•••	°C	R
State Room temperature HC1 [BT50]	•••	•••	•••	°C	R/W
State Offset Curve HC1	•••	•••	•••		R/W
State Heat Curve HC1 [BT50]	•••	•••	•••		R
Total Thermal Power Heating	•••	•••	•••	kWh	R
Total Operating time direct heater	•••	•••	•••	h	R
Actual Return temperature HC1 [BT3]	•••	•••	•••	°C	R
Actual Brine Out Flowtemperature [BT11]	•••	•••	•••	°C	R
Actual Brine In Flowtemperature [BT10]	•••	•••	•••	°C	R
State Compressor	•••	•••	•••		R
Actual Hot Water Top temperature [BT7]	•••	•••	•••	°C	R
Total Thermal Power Hot Water	•••	•••	•••	kWh	R
Actual Heatpump Flowtemperature [BT12]	•••	•••	•••	°C	R
Actual Liquid Line temperature [BT15]	•••	•••	•••	°C	R
Actual Outdoortemperature [BT1]	•••	•••	•••	°C	R
Actual Heatpump Flow Sensor [BF1]	•••	•••	•••	l/m	R
State Brine Pump Speed [GP2]	•••	•••	•••	%	R
State Compressor Starts	•••	•••	•••	count	R
State Circulation pump HC1 [GP10]	•••	•••	•••	%	R
State Calculated Supply Flowtemperature	•••	•••	•••	°C	R
Actual Electrical Power Compressor	•••	•••	•••	W	R
State Compressor Operation hours	•••	•••	•••	h	R
State Hot Water Demand	•••	•••	•••		R/W
State Hot Water operation mode	•••	•••	•••		R
State Cooling operation mode	•••	•••	•••		R
State Heatpump Operating prioritisation	•••	•••	•••		R
Actual Flowtemperature Buffer to HC [BT25]	•••	•••	•••	°C	R
State Circulationpump HC1	•••	•••	•••		R
Actual Current BE3	•••	•••	•••	A	R
Actual Current BE2	•••	•••	•••	A	R
Actual Current BE1	•••	•••	•••	A	R
State Heatpump Operating mode	•••	•••	•••		R/W
Actual Electrical Power	•••	•••	•••	W	R
State Hot Water Circulation pump [GP11]	•••	•••	•••		R
State Target Heating Supply Flowtemperature HC1	•••	•••	•••	°C	R/W
State Target Cooling Supply Flowtemperature HC1	•••	•••	•••	°C	R/W
State Alarm number	•••	•••	•••		R
State Active alarm	•••	•••	•••		R
Release Heating at manual mode	•••	•••	•••		W
Release Cooling at manual mode	•••	•••	•••		W

Loading registers…

Nibe (KNV) Heating & Cooling (S-Series)

Overview

Key readings

Available commands

Use cases

Installation

Things to watch for

Registers (42)

Working with Modbus in your projects?

Question about your setup?

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