Part
2. Functional Specifications
DCM014A51
Design Guide
23
Device Instance Number
Not used (zero)
2. Settings related to the
BACnet
Server Gateway functions such as the device instance number
can be done from the
BACnet
Server Gateway configuration in the
iTM
Service Settings menu.
Refer to the
iTM BACnet
Server Gateway Commissioning manual for more details.
3.
iTM
and BACnet® Server Gateway Logic
3.1
BACnet
Virtual Router Function
1. The
iTM BACnet
Server Gateway provides seamless control logic between the
iTM
and BMS.
2. The
BACnet
virtual router function allows the BMS to see each Indoor Unit Management Point
as a separate device. This allows for each Indoor Unit Management Point to have its own
independent device ID.
3.2
iTM BACnet
Server Gateway Point Logic in the
iTM
1. Each point exposed to the BMS from the
iTM BACnet
Server Gateway is linked to the logic in
the
iTM
. This alleviates the need for the BMS integrator to create programming to control the
VRV
system. The image below identifies which
BACnet
points are linked to the
iTM
logic.
Figure 19. BACnet® Server Gateway Point and
iTM
Logic matchup
2. Each Indoor Unit Management Point can be assigned independent cooling and heating
occupied and unoccupied setpoints.
a. Setpoints set by the BMS are also updated in the
iTM
, and setpoints set at the
iTM
are
updated to the BMS.
b. The same logic applies to the setpoint range limitation as stated in Part 1., 3.1(2)(b) for the
minimum and maximum setpoint for cooling and heating.
c. To see how the occupancy mode is monitored and controlled, refer to 7.2.1.
4bytes
2bytes
