HVAC - Daikin VRV (bacnet,KNX or modbus)?

Hi,

I am planning my openHAB installation - One of the key functions is controlling my HVAC VRV system (3 units on one bus).

How does support rate for each of bacnet, KNX or modbus? I can choose any of the interfaces for the system.

Apologies if this is in the wrong place

D