For detailed register lists specific to your software version (e.g., LA08 or CA15), refer to the official MEHITS S.p.A. W3000+ Modbus Register List or the W3000 Controller Interface Manual . W3000+Version 17 - Alklima
Avoid polling registers individually. Group your BMS requests into block reads (Function Code 03 or 04) to scan consecutive registers in a single transmission. This dramatically reduces traffic overhead on the RS485 bus. Managing Polling Intervals climaveneta w3000 modbus
| Register Address (Decimal) | Parameter | Access | Scale/Unit | |----------------------------|-----------|--------|-------------| | 0 | Unit On/Off (1=On, 0=Off) | R/W | - | | 2 | Active alarm code | R | - | | 10 | Evaporator inlet temp | R | °C x 10 | | 11 | Evaporator outlet temp | R | °C x 10 | | 20 | Chilled water setpoint | R/W | °C x 10 | | 30 | Compressor 1 status (0=Off,1=On) | R | - | For detailed register lists specific to your software
: Input the matching serial parameters and build the data polling polling points using the Climaveneta Modbus documentation. Group your BMS requests into block reads (Function
: The serial card (often a PCOS004850 for RS485/Modbus) is inserted into a dedicated slot labeled "BMS Card" on the controller board.
Depending on the generation of your W3000 controller (such as the W3000 Large or W3000 Compact), serial communication requires a specific interface card plugged into the motherboard:
