Hoval Heating & Cooling
Control Hoval TopTronic E heating and cooling systems via Modbus TCP or RTU.
This ModbusCloud template controls and monitors Hoval TopTronic E heating and cooling systems via the Hoval Connect Modbus Gateway (part 6049501) over Modbus TCP or RTU. It reads flow and return temperatures for up to two heating circuits, outdoor temperature, domestic hot water temperatures, electrical and thermal power, current and annual COP, and total energy per mode. Writes are supported for setpoints, operating modes, and DHW control.
- Protocol
- Modbus TCP
- Connection
- Ethernet, Modbus TCP
- Registers
- 49, read and write
- Brand
- Hoval
- Key readings
- Flow and return temperatures HC1/HC2 · Outdoor temperature · DHW storage temperatures (top/bottom) · Electrical and thermal power (kW) · Current COP and annual performance factor · Total energy (heating, cooling, DHW)
- Available commands
- Heating/cooling flow setpoints HC1/HC2 · DHW setpoint temperature · Operating mode HC1/HC2 · DHW operating mode
- Compatible models
- TTE · Belaria · UltraSource · UltraGas · UltraOil · BioLyt · UltraSol · Thermalia · TopGas · MultiJet · Max-3
- Last updated
Registers (49)
41 read, 10 write
| Name | Unit | Access | Address (Hidden until you enter your email) | Function (hidden) | Type (hidden) |
|---|---|---|---|---|---|
| Aktuelle Vorlauftemperatur HC2 [VF2] | °C | Read | |||
| Status Betriebsart HC2 | Read | ||||
| Aktuelle Warmwasserspeichertemperatur Oben [SF1] | °C | Read | |||
| Status Warmwasserspeicher Betriebsart | Read | ||||
| Status Warmwasserspeicher Solltemperatur | °C | Read | |||
| Status Erzeuger Betriebsart | Read | ||||
| Status Betriebsart HC1 | Read | ||||
| Aktuelle Vorlauftemperatur HC1 [VF1] | °C | Read | |||
| Status Erzeuger Solltemperatur | °C | Read | |||
| Aktuelle Erzeugervorlauftemperatur [CVF] | °C | Read | |||
| Status Erzeuger Betriebsmeldung | Read | ||||
| Aktuelle Regelstrategie HC1 | Read and write | ||||
| Aktuelle Regelstrategie HC2 | Read and write | ||||
| Aktuelle Außentemperatur [AF1] | °C | Read | |||
| Aktuelle Warmwasserspeichertemperatur Unten [SF2] | °C | Read | |||
| Aktuelle Puffertemperatur Oben [PF1] | °C | Read | |||
| Aktuelle Pufferisstemperatur Unten [PF2] | °C | Read | |||
| Status Pufferspeicher Betriebsart | Read | ||||
| Status Pufferspeicher Solltemperatur | °C | Read | |||
| Status Elektrische Gesamtleistung | MWh | Read | |||
| Status Thermische Gesamtleistung Heizbetrieb | MWh | Read | |||
| Status Thermische Gesamtleistung Warmwasserbetrieb | MWh | Read | |||
| Status Thermische Gesamtleistung Kühlbetrieb | MWh | Read | |||
| Aktuelle elektrische Leistung | kW | Read | |||
| Aktuelle thermische Leistung | kW | Read | |||
| Status Vorlaufsolltemperatur HC1 | °C | Read | |||
| Status Vorlaufsolltemperatur HC2 | °C | Read | |||
| Status Fehlercode vom Automaten | Read | ||||
| Status Mischkreispumpe HC1 | Read | ||||
| Status Mischkreispumpe HC2 | Read | ||||
| Status Mischer HC1 | % | Read | |||
| Status Mischer HC2 | % | Read | |||
| Aktueller COP | Read | ||||
| Aktuelle HZ Puffer WPF Temperatur | °C | Read | |||
| Aktuelle Rücklauftemperatur | °C | Read | |||
| Aktueller Volumenstrom | l/min | Read | |||
| Status Detailstatus Wärmepumpe | Read | ||||
| Status Jahresarbeitszahl | Read | ||||
| Status Schaltzyklen | count | Read | |||
| Status Betriebsstunden | h | Read | |||
| Aktuelle Modulation | % | Read | |||
| Sollvorlauftemperatur Heizen HC1 | °C | Write | |||
| Warmwasser Solltemperatur | °C | Write | |||
| Warmwasser Betriebsart | Write | ||||
| Sollvorlauftemperatur Heizen HC2 | °C | Write | |||
| Sollvorlauftemperatur Kühlen HC1 | °C | Write | |||
| Sollvorlauftemperatur Kühlen HC2 | °C | Write | |||
| Betriebsart HC1 | Write | ||||
| Betriebsart HC2 | Write |
Loading registers…
Send your device list
If a device is not in the library yet, we build the template for free as soon as we have the register data.
Use cases
- Show the full heating system at a glance with outdoor temperature, flow and return on every circuit, and current electrical vs thermal power.
- Automatically reduce flow temperature during warm afternoons or when a room thermostat signals satisfied demand.
- Log annual performance factor and total energy per mode for subsidy applications or your own reports.
- Trigger an alert when the COP drops below an expected threshold, a sign of a refrigerant or air-flow problem.
- Remotely activate or deactivate cooling mode on HC1 or HC2 based on room temperature or outside forecast.
Installation
Install the Hoval Connect Modbus Gateway (6049501) on the TopTronic E system and connect it to the LAN for Modbus TCP, or to the RS485 bus for Modbus RTU.
Configure the gateway address and baudrate (RTU) or IP (TCP) per the Hoval installation guide.
In ModbusCloud, add a matching Modbus TCP or RTU device and import the Hoval Heating and Cooling template.
Verify readings in the first minute. If total energy values look wrong, your firmware may still use the old 16-bit layout and you should switch to the older Energy Management template.
Things to watch for
Total energy registers return impossibly large numbers. Firmware version issue?
Yes. Hoval 3.0.0 changed the total energy registers from two 16-bit high and low to single 32-bit values. If your firmware is older than 3.0.0 you will see overflow. Either update the TopTronic E firmware or switch to the older Energy Management Template.
Modbus RTU or Modbus TCP: which one should I choose?
Both work equally well. Choose TCP when the Hoval cabinet is near a network switch, and RTU when you want to run a single twisted pair to the ModbusCloud gateway. The register map is identical.
I can read everything but writing setpoints has no effect. Why?
Some Hoval installations lock external setpoint writes at commissioning. Ask the commissioning engineer to unlock the external control permission on the TopTronic E menu. Without that, Modbus writes are accepted silently but not applied.
Want to see how it works?
