5
3. Air-Conditioning Group Configuration
The groupings set up in the G-50 determine which unit
addresses can accept commands from the BACnet BMS system.
The group number is defined as ‘the lowest indoor unit address
within the group’. This then becomes the ‘master’ address for the
group, and is the only address within that group than can accept
commands.
The other units within a group can be classed as ‘slave’ units
and contain the same status parameter values as the ‘master’,
apart from the Error Code, which is unique to each unit.
In the example above, addresses 01, 03, 06 and 08 are the
‘master’ units, and 02, 04, 05 and 07 are the ‘slave’ units.
IC
01
*
IC
02
IC
03
*
IC
04
IC
05
IC
06
*
IC
07
IC
08
*
G-50
Group
01
Group
03
Group
06
Group
08
M-NET
Fig.4 Grouping Example
Note: Attempting to write a command to a ‘slave’ unit will have no
effect.
