My Windhager system does not respond to Modbus TCP requests. What should I check?

Verify that the InfoWIN Touch firmware has been updated to V3.2.0 and that the system software meets the minimum version (V1.00 for LOGWIN2/DOUWIN2, V1.33 for AEROWIN DELUXE). Confirm that the gateway and Windhager device are on the same subnet and that no firewall is blocking the Modbus TCP port.

Is my older Windhager system compatible with this template?

Systems based on MES+, MES Infinity, or Infinity-TA are not compatible. Only devices with the Infinity Plus controller and LAN capability can be updated to support Modbus TCP.

How do I obtain the firmware update for Modbus TCP?

The update can be ordered free of charge through Windhager Customer Service. They will provide the necessary firmware files and instructions for the InfoWIN Touch display and the heating system controller.

Which registers are used for SG Ready control?

The template includes a dedicated write register for SG Ready status. Consult the Windhager Modbus documentation for the exact register address and accepted values, and verify correct operation after setup.

Free Modbus template: Windhager Best Heating Technology Heatpump

Name: Windhager Best Heating Technology Heatpump
Brand: Windhager
SKU: e4272fbb-073f-4b06-93d9-e2f01f7850d6

This template connects Windhager heat pump and heating systems via Modbus TCP. It reads temperatures, operating hours, energy data, and alarm codes. It also allows control of heating circuit modes, DHW modes, setpoints, SG Ready status, and party timers.

Registers (45)

44 read / 13 write

Name	Address	Function	Type	Unit	Access
Flow temperature AW	•••	•••	•••	°C	R
Flow temperature setpoint AW	•••	•••	•••	°C	R
Current heat pump output	•••	•••	•••	%	R
Accumulator tank temperature TPO	•••	•••	•••	°C	R
Accumulator tank temperature TPM	•••	•••	•••	°C	R
Accumulator tank temperature TPU	•••	•••	•••	°C	R
Outside temperature	•••	•••	•••	°C	R
Flow temperature heating circuit 1	•••	•••	•••	°C	R
Flow temperature setpoint heating circuit 1	•••	•••	•••	°C	R
Select mode heating circuit 1	•••	•••	•••		R/W
Optimisation heating circuit 1	•••	•••	•••	K	R/W
DHW temperature	•••	•••	•••	°C	R
DHW temperature setpoint	•••	•••	•••	°C	R
Flow temperature heating circuit 2	•••	•••	•••	°C	R
Flow temperature setpoint heating circuit 2	•••	•••	•••	°C	R
Room temperature heating circuit 1	•••	•••	•••	°C	R
Room temperature heating circuit 2	•••	•••	•••	°C	R
Select mode heating circuit 2	•••	•••	•••		R/W
Select mode DHW	•••	•••	•••		R/W
DHW single charge	•••	•••	•••		R/W
Optimisation heating circuit 2	•••	•••	•••	K	R/W
Operating hours cooling	•••	•••	•••	h	R
Alarm code Heat generator	•••	•••	•••		R
Party Timer heating circuit 1	•••	•••	•••	min	R/W
Setpoint Eco/Party heating circuit 1	•••	•••	•••	°C	R/W
Setpoint Eco/Party heating circuit 2	•••	•••	•••	°C	R/W
Party Timer heating circuit 2	•••	•••	•••	min	R/W
Operating phase AW	•••	•••	•••		R
Operating modes heating circuit 1	•••	•••	•••		R
Operating modes heating circuit 2	•••	•••	•••		R
Operating modes DHW	•••	•••	•••		R
Select mode Buffer	•••	•••	•••		R/W
Select mode AW	•••	•••	•••		R
Charge Status	•••	•••	•••	%	R
Upper cold buffer temperature	•••	•••	•••	°C	R
Lower cold buffer temperature	•••	•••	•••	°C	R
SG Ready Status	•••	•••	•••		R/W
Operating hours for heating	•••	•••	•••	h	R
Number of heating starts	•••	•••	•••	count	R
Heat quantity for heating	•••	•••	•••	MWh	R
Number of cooling starts	•••	•••	•••	count	R
Amount of energy for cooling	•••	•••	•••	MWh	R
E-Heater operating hours	•••	•••	•••	h	R
Number of E-Heater starts	•••	•••	•••	count	R
External heat demand	•••	•••	•••	°C	W

Loading registers…

Windhager Best Heating Technology Heatpump

Overview

Key readings

Available commands

Use cases

Installation

Things to watch for

Registers (45)

Working with Modbus in your projects?

Question about your setup?

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