When integrating a W3000, the Modbus connection allows the BMS to act as the "Master," polling the chiller (the "Slave") for data and writing commands to change its behavior.
| Register Address (Decimal) | Parameter | Data Type | Units / Scale | Access | | :--- | :--- | :--- | :--- | :--- | | 0 | Unit Status (Off/On/Alarm) | Uint16 | Enum (0=Off,1=On,2=Alarm) | Read | | 1 | Operating Mode | Uint16 | 0=Cool, 1=Heat, 2=Auto | Read/Write | | 2 | Remote On/Off | Uint16 | 0=Local, 1=Remote | Read/Write | | 10 | Active Setpoint | Float (2 regs) | °C x 10 (e.g., 70 = 7.0°C) | Read | | 20-21 | Evaporator Entering Temp | Float | °C | Read | | 22-23 | Evaporator Leaving Temp | Float | °C | Read | | 24-25 | Condenser Entering Temp | Float | °C | Read | | 26-27 | Condenser Leaving Temp | Float | °C | Read | | 40-41 | Suction Pressure | Float | Bar | Read | | 50-51 | Discharge Pressure | Float | Bar | Read | | 100-101 | Compressor 1 Current | Float | Amps | Read | | 102-103 | Compressor 2 Current | Float | Amps | Read | | 200 | Alarm Code 1 (Active) | Uint16 | Climaveneta proprietary code | Read | | 210 | Total Running Hours | Uint32 (2 regs) | Hours | Read | | 500 | Chiller Enable (Remote Setpoint) | Uint16 | 0-100% capacity limit | Write | climaveneta w3000 modbus
For (if using optional gateway): Set IP address, subnet mask, gateway, and TCP port (default 502). When integrating a W3000, the Modbus connection allows
Before delving into the communication protocols, it is essential to understand the hardware being controlled. The Climaveneta W3000 series represents a range of air-source heat pumps and chillers designed for high efficiency and flexibility. Known for their scroll compressors and advanced logic, these units are often deployed in commercial buildings, hotels, and large residential complexes. The Climaveneta W3000 series represents a range of