Siemens ProtoAir FPA-W44 - BACnet: Setting Node_Offset to Assign Specific Device Instances; Assigning BACnet Device Instances

Siemens ProtoAir Start-up Guide
Page 22 of 66
7 BACNET: SETTING NODE_OFFSET TO ASSIGN SPECIFIC DEVICE
INSTANCES
• Follow the steps outlined in Section 6.1 to access the ProtoAir 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_Offset + Node_ID
For example, if the desired Device Instance for device 1 is 50,001 and the following is true:
- Device 1 has a Node-ID of 1
Then plug 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
• Click “Submit” once the desired value is entered.
Figure 17: Active Profile
Figure 16: Web Configurator Node Offset Field