About the MAC Address
The MAC Address is a number from 0 to 255; however we recommend reserving some MAC Addresses for common commissioning and maintenance tasks. For example, when a portable adaptor is set to use one of these reserved MAC Addresses, it can be temporarily connected with certainty to any data bus of any site without conflicting with other devices already connected to the data bus.
MAC Addresses should be used as shown in the following table.
Table 2-6: Recommended BACnet MS/TP Bus MAC Address Values / Ranges for BACnet MS/TP Bus Devices