FieldServer FS-8704-06 - Manual (Page 22)

FS-8704-06 BACnet IP Driver Manual Page 22 of 57
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web: www.fieldserver.com
Tel: (408) 262 2299 Fax: (408) 262 2269 Toll Free: (888) 509 1970 email: [email protected]
Appendix A.6. Using BBMD
A BBMD (BACnet Broadcast Management Device) is used to allow devices on different subnets to communicate to
one another. BACnet/IP requires that a BBMD be defined on every subnet. The FieldServer can act as a BBMD for
the subnet that it resides on. Setting the Connection_Type to BBMD will enable this functionality on the
FieldServer.
Notes:

BBMD operation is not required if there is already another BBMD on the subnet – there can only be one BBMD
per subnet.

The FieldServer cannot act as a BBMD and a BACnet/IP Client at the same time.
Appendix A.6.1. Setting up a Broadcast Distribution Table (BDT)
The FieldServer supports two methods of updating its internal broadcast distribution table.

Trane’s Tracer Summit IP Validation utility can be used directly to upload and download a Broadcast
Distribution Table.

The Broadcast Distribution Table can be configured using the bdt.ini file. The following file must be created
and downloaded to the FieldServer using the Ruinet “Download Configuration” command.
// Bdt.ini
// The format of this table must be :
//
// BBMD IP_Address , BBMD port , BBMD subnet Mask
24.90.48.179
, 47808 , 255.255.255.255
64.80.115.156 , 47808 , 255.255.255.255
Appendix A.6.2. BBMD Configuration Example
Using the following configuration, a PC using BACnet explorer is able to browse and display the contents of two
FieldServers. The following image shows the BACnet explorer screen.