Triangle Tube’s ProtoNode Startup Guide
Page 11 of 40
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2.3.3.1
BACnet MS/TP or BACnet/IP: Assigning Specific Device Instances
2.3.4 Metasys N2 and Modbus/TCP (FPC-N34): Setting the Node-ID
•
The A Bank of DIP switches are also used to set the BACnet Device Instances.
•
The BACnet Device Instance can range from 1 to 4,194,303.
•
The BACnet device instances will be calculated by taking the Node_Offset (default is 50,000) found in
Web Configurator (Section 2.3.2.1) and adding it to the value of the A Bank DIP switches (MAC
address). When more than one device is connected to the ProtoNode, the subsequent BACnet
Device Instance numbers will be sequential from the first/previous device.
For example:
•
Given that: Device Instance = Node_ MAC address
o
Default Node_Offset value = 50,000
o
A Bank DIP switch (MAC address) = 11
•
Then the Device Instance values for the devices are:
o
Device 1 Instance = 50,011
o
Device 2 Instance will then be 50,011(Device Instance 1)
+1
= 50,012
o
Device 3 Instance will then be 50,012 (previous Device Instance)
+1
= 50,013
•
With the default Node_Offset value of 50,000 the Device Instances values generated will be within the
range of 50,000 to 50,127.
•
The values allowed for a BACnet Device Instance can range from 1 to 4,194,303.
•
To assign a specific Device Instance (or range), change the Node_Offset value.
•
Methods for changing the Node_Offset value are provided in Section 4.2
o
This step cannot be performed until after the unit is connected and powered.
•
Set DIP switches A0 – A7 to assign Node-ID for Metasys N2 and Modbus TCP for the ProtoNode FPC-
N34.
•
Metasys N2 and Modbus/TCP Node-ID Addressing: Metasys N2 and Modbus/TCP Node-ID’s range
from 1-255
•
Please refer to
Appendix D.1
for the full range of addresses for setting Node-ID.
2.3.3 BACnet MS/TP and BACnet/IP (FPC-N34): Setting the Device Instance (Node-ID)