BACnet Networks for STT20 Fire

The application communication is based on the BACnet standard protocol.

BACnet is a building automation and control networking protocol designed to meet the communication needs of building automation and control systems, as well as safety applications.

Desigo CC uses BACnet in combination with IP networks (Ethernet). This solution is called BACnet/IP although it is referred to as BACnet in this documentation.

BACnet Network

On IP infrastructures applying UDP services, a BACnet network (BACnet/IP) consists of one or more IP subnets. All networked units are BACnet devices and must have a unique Device Identifier. The Desigo CC server or FEP (represented by the BACnet driver) are also BACnet devices.

BACnet Addressing

The BACnet addressing is based on the instance number, the BACnet Device identifier (a value between 0 and 4194303). The instance number configured in Desigo CC for BACnet panels must match the BACnet Device ID configured in the engineering tool of the panels.

BACnet Interfaces

When a BACnet interface (for example, the NK823x Ethernet Port) is used to integrate non-BACnet panels, both the interface and the connected panels have assigned a unique instance number at Desigo CC level.

BACnet Stack Protocol Service

The BACnet Stack Protocol Service (BACstack) is the driver that handles the network communication. The BACstack service handles a physical port for every physical driver.