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BACnet COM Address of Room Controller SE7000 and SE8000

Issue

When installing SE7000/SE8000 Room Controllers to connect them to a BACnet MS/TP network, multiple issues can arise:

  • Leaving the Room Controller's COM address at 254 (default value out of the box) will make the room controller undiscoverable by the front end.
  • Choosing a Com address value between 128 to 253 will cause the front end system to convert the com address to 127, causing duplicates when working with multiple Room Controllers.
  • Room controllers with COM address set to 0 will prevent the front end from discovering any devices

Product Line

EcoStruxure Building Expert, EcoStruxure Building Operation, Other

Environment

  • SE8xxx Room controller
  • SE8000 Series
  • SER8300, SE8300, SE8350, SE8600
  • Viconics branding VT8000 Series
  • SE7000 Series Controllers, VT7000 Series Controllers, 7600, 7300, 7200

Cause

Master devices, those who participate in the token-passing protocol, must be addressed from 1 to 127. Addresses from 128 to 253 are reserved for slaves who do not participate in the token passing; however, they can occupy lower addresses as well.

Resolution

COM address must be changed to a value in the range of 1-127.

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