Sharing devices associated with an A7810, A8810, A8812 to a BACnet/IP network

This article may be helpful for the following reasons:
  • Wanting to share devices and datapoints on the Device List of the EMH via BACnet/IP
  • Requesting information in advance so that the EMH is programmed to work with the on site BACnet network
  • Having difficulty seeing/detecting the instance ID#s and subsequent objects from the EMH

What items do I need to know from the person managing the BACnet network to program into the EMH to have its devices appear on the BACnet network?
  • BACnet UDP Port: (default: 47808)
  • Virtual Network Number: (1-65534)
  • BBMD mode: [Three options below]
    • Disable all bbmd features
    • Allow incoming FDR
    • Full BBMD
      • If full BBMD, a list of IP addresses can be entered by IP : PORT
        example: 192.168.1.1:47808, 192.168.2.1:47808
  • BACnet base object ID: (1-4194302)
    [each EMH could use base object ID# through base+255]
  • BACnet base object name: (ex. ELEC_RM_NORTH , ROOM105)

Where should I go to program the EMH to begin sharing devices and datapoints on the BACnet network?
  1. BACnet > Gateway
    1. Meters shared via BACnet is set to All
    2. All items below are showing green check mark status
    3. Check BACnet base ID# setting on that page, and note this number (this is the base object instance number)
  2. BACnet > Setup
    1. Confirm BACnet port matches that of the other devices
    2. Adjust virtual network number if needed
    3. Set BBMD mode and distribution accordingly; typically needed when IP of EMH is not on the same subnet as the BACnet system
  3. BACnet > Discover
    • Scan Device ID# between the base object instance number and the base+250 . Devices on the Devices > Device List should appear on the screen, indicating what BACnet instance numbers they are located on.
      • On any of those line items, click the "objects" link for object datapoint listing with the associated analog input #’s. These can be listed as a BACnet EPICS template if desired by clicking the appropriate button.

Example:

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EMH connected devices list

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Example of live readings from device 5, electrical meter

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BACnet configuration where base object ID# located under BACnet > Gateway (246000)

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BACnet object ID#s of each device from the device list. Click into the BACnet Objects link of the device in question to view the datapoint listing & EPICS

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Example EPICS statement showing the points list for BACnet object #246005
 
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