BACnet Router Start-up Guide
Page 20 of 27
7.2.1 DeviceFind
T M
The diagnostics page offers a DeviceFind
TM
function for listing BACnet devices that are visible to the
router. A configurable Who-Is broadcast is sent out when the 'Start' button is pressed, and I-Am
responses received back from the field are listed, along with the name of the router port by which each
device can be reached.
DeviceFind
TM
is limited to 300 devices. There may be more devices on a large BACnet network, and the
Who-Is request can be limited to devices of interest by configuring discovery parameters.
The following fields exist for configuring the Who-Is broadcast (all are optional):
•
Low Device Instance
– sets a low limit for the Device Instance. Devices with a lower instance
number will ignore the Who-Is request.
•
High Device Instance
– sets a high limit for the Device Instance. Devices with a higher instance
number will ignore the Who-Is request.
•
Network
– broadcasts the Who-Is request only on the BACnet network segment with the
specified network number. This depends on the router being able to find the specified network.
DeviceFind
TM
is performed by the device object configured on the router. Since this device is bound
locally to the BACnet/IP Primary segment, all devices present on this BACnet segment will appear as
local devices with network number 0. Also, to discover only the devices present on this BACnet segment,
set the Network parameter to 0.
7.2.1.1 Export Button
This button appears when some devices have been discovered. The user may click this button to save
the list of discovered devices to a file called "BACnet Devices.csv".
Figure 14: BACnet Router DeviceFind
TM
