BACnet MS/TP Communication Data Bus Fundamentals
Network Guide 37
An example of this numbering system is shown below.
Figure 22: BACnet MS/TP Numbering System for MAC Addresses, Device Instance Numbers, and Network
Numbers
Table 8: Recommended Numbering Scheme for MAC Addresses, Instance Numbers, and Network
Numbers
Description Range Example
BACnet/IP Network Number 0 to 65 534 1
Building Controller BACnet/IP Device
Instance Numbers: Multiples of 10 000
10 000 to 4 190 000 10 000
20 000
BACnet MS/TP Network Number: Building
Controller BACnet/IP Device Instance Num-
ber/1000 + 0,1,2,3,4 (for each LAN)
10 to 4190 10
11
12
BACnet MS/TP Device Instance Number =
EC-BOS BACnet MS/TP Network Number *
1000 + MAC Address
10 000 to 4 190 256 10 006 where MAC
= 6
When discovering devices with an EC-BOS which has the routing option config-
ured, it will discover all BACnet devices connected to all EC-BOS controllers. Make
sure to add only the devices connected to the MS/TP port of the specific EC-BOS
being configured. Using this numbering system will greatly help to identify those
devices that should be added to a given EC-BOS.
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