Bacnet: Setting Node_Offset To Assign Specific Device Instances; Figure 25: Web Configurator Node Offset Field; Figure 26: Active Profiles - SMC Networks Lochinvar ProtoNode Startup Manual

7.5

BACnet: Setting Node_Offset to Assign Specific Device Instances

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Follow the steps outlined in Section
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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
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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
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Click "Submit" once the desired value is entered.
6 to access the ProtoNode Web Configurator.

Figure 25: Web Configurator Node Offset Field

Figure 26: Active Profiles

Page 25 of 56
Lochinvar ProtoNode Start-up Guide