Use a shielded twisted-pair cable. Connect the A(+) and B(-) terminals from your Modbus Master to the corresponding terminals on the Climaveneta interface card.
Before the BMS can "talk" to the unit, you must configure the supervisor parameters through the W3000 keypad: : Common speeds are 19200 baud climaveneta w3000 modbus
Before you can pull data, you need a solid physical connection. The W3000 typically features a removable terminal block for serial communication. Use a shielded twisted-pair cable
Has anyone found a comprehensive register map for the latest firmware revision? Let's discuss in the comments! ⬇️ climaveneta w3000 modbus