The document decribes how EcoStruxure Machine Expert – HVAC implements BACnet communication on Modicon M172 controllers, covering BACnet/IP and MS/TP networks, the supported B‑AAC profile, and required system parameters. It includes the creation, configuration, and commissioning of BACnet objects, along with alarm and event handling, scheduling, BMS/SCADA integration via EDE files, and support for BACnet interoperability building blocks.