Camus ProtoNode Start-up Guide
Page 36 of 87
5.6 BACnet: Setting Node_Offset to Assign Specific Device Instances
• Follow the steps outlined in Section 5.1 to access the ProtoNode Web Configurator.
• Node_Offset field shows the current value (default = 50,000).
o 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 as needed using
the calculation below:
Device Instance (desired) = Node_Offset + Node_ID
For example, if the desired Device Instance for the device 1 is 50,001 and the following is true:
- Device 1 has a Node-ID of 1
- Device 2 has a Node-ID of 22
- Device 3 has a Node-ID of 33
Then plug the device 1’s information into the formula to find the desired Node_Offset:
50,001 = Node_Offset + 1
50,000 = Node_Offset
Once the Node_Offset value is input, it will be applied as shown below:
- Device 1 Instance = 50,000 + Node_ID = 50,000 + 1 = 50,001
- Device 2 Instance = 50,000 + Node_ID = 50,000 + 22 = 50,022
- Device 3 Instance = 50,000 + Node_ID = 50,000 + 33 = 50,033
• Click “Submit” once the desired value is entered.
Figure 25: Active Profiles
Figure 24: Web Configurator Node Offset Field
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