Foreign Device Settings
Some BACnet/IP devices also support a feature called Foreign Device Registration (FDR). FDR allows a BACnet/IP device
to send broadcast messages to a device with BBMD enabled. The BBMD-enabled device will then forward these broad-
cast messages to all other BBMDs and onto all other FDR devices. If a subnet has only FDR supported devices, then it
does not need a local BBMD. These devices can register directly with a BBMD on another subnetwork.
Item Description
IP IP address of a controller (foreign device) located on another subnetwork
Port Delay after which the foreign device is forgotten
Time to Live Time-to-live value that serves as a timestamp attached to the data. Once the timespan has elapsed, data is discarded.
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Network MS/TP Ports
BACnet MS/TP and Modbus RTU communications are made by connecting directly to separate RS-485 ports.
On-board
RS-485 Port
is the controller’s onboard RS-485 port. The following network configuration parameters are for an RS-485
port that is used to communicate with BACnet MS/TP controllers.
Figure40: Network MS/TP Ports
Item Description
On / Off
Enables/disables the controller’s BACnet MS/TP connection. If the controller has been configured to use Modbus RTU,
this option cannot be enabled.
Network Number
Network number identifies a LAN for routing purposes. All controllers with the same network number are members of the
same logical BACnet network. See Device Addressing.
Baud Rate Recommended baud rate setting is 38 400. See Baud Rate.
Mac Address The ECLYPSE controller’s MAC Address on the BACnet MS/TP Data Bus.
Max Master
When commissioning a BACnet MS/TP Data Bus, it is useful to start with the Max Master set to 127 so as to be able to
discover all devices connected to the data bus. Then, once all devices have been discovered and the MAC Addressing is
finalized by eliminating any gaps in the address range, set the Max Master (the highest MAC Address) to the highest
Master device’s MAC Address number to optimize the efficiency of the data bus. See Setting the Max Master and Max Info
Frames.
Max Info Frames For the ECLYPSE controller, this should be set to 20. See Setting the Max Master and Max Info Frames.
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Apply Click
Apply
to apply and save the changes.
ECLYPSE Web Interface
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