42
© 2020 Carrier
10.5
BACnet: Setting Node_Offset to Assign Specific Device Instances
•
Follow the steps outlined in
Section
to access the MB485ETH-CG Web Configurator.
•
The 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_ 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_ 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 45: Web Configurator Node Offset Field
Figure 46: Active Profiles
