FS-8700-16 BACnet PTP Serial Driver Manual
Page 17 of 32
FieldServer Technologies
1991 Tarob Court Milpitas, California 95035 USA
Web
: www.fieldserver.com
Tel
: (408) 262-2299
Fax
: (408) 262-9042
Toll Free
: (888) 509-1970
Appendix A.
Useful Features
Appendix A.1.
BACnet object names
When an external BACnet Client builds a list of Object Names, the BACnet Server Map Descriptor names determine
the BACnet Object Name. If the Map Descriptor length is greater than 1, the Object Name will be suffixed with the
index into the Map Descriptor. For example, if the Map Descriptor name is SMD_AI_01 and the length 3, then the
Object Names will be SMD_AI_01[0], SMD_AI_01[1] and SMD_AI_01[2].
Appendix A.2.
Network number
If multiple BACnet Nodes are specified on the Server side, the FieldServer automatically defaults to virtual
operation. In effect, the FieldServer simulates a software router. BACnet identifies this FieldServer using a
combination of it’s network number and IP/MAC address. The default Network number of a FieldServer is 5. If
there is more than one FieldServer on a BACnet intranet with multiple nodes, the default network number of the
additional FieldServers will need to be changed and a unique number allocated to each.
A unique network number will need to be assigned if
both
of the following conditions are true:
The FieldServer has multiple BACnet Server nodes.
There is more than one FieldServer on a network which includes multiple BACnet nodes.
To override the FieldServer’s default network number 5 include the following in the configuration file:
Section Title
Bridge
Column Title
Function
Legal Values
Title
FieldServer name
Text
Network_Number* Specify a unique network number if there are multiple virtual Server nodes. 1-65534,
5
Example
// FieldServer Driver specific parameters
Bridge
Title
, Network_Number
BACnet Server
, 6
Note:
While it is theoretically possible to have up to 65535 virtual nodes, it is recommended that a maximum of 32
is configured. If an application requires the configuration of more than 32 virtual nodes please consult FST.