Part
2. Functional Specifications
DCM014A51
Design Guide
21
Part 2. Functional Specifications
1. Introduction
The Daikin
iTM
BACnet® Server Gateway operates as a
BACnet
interpreter using the services defined by
BACnet
to return the status of the indoor units connected to the DIII network. It also sends configuration
commands to the indoor units, in response to requests from the BMS (i.e.,
BACnet
Client) which
supports the
BACnet
protocol (ISO16484-5, ANSI/ASHRAE135).
2. Network Topology
2.1 Visualization of Each Device on the
BACnet
Network
1.
iTM
: Operates as a
BACnet
router/gateway for the
VRV
indoor units.
2. Indoor unit device: One indoor unit management point is handled as one virtual
BACnet
device.
a. In the
BACnet
specifications, the
VRV
communication line (DIII network) is handled as one
virtual
BACnet
network.
(See Annex H.1 and H.2 in the
BACnet
2004 specifications.)
3. System control device: It is handled as a virtual
BACnet
device to receive settings (i.e.,
enable/disable and the like) for the
iTM
system configuration points.
4. For a typical
BACnet
network configuration, see chapters 4.2 and Annex in the
BACnet
2004
specifications.
Figure 18.
BACnet
Network