ClimateWorx ProtoNode Start-up Guide
Page 24 of 46
6
BACNET MS/TP AND BAC NET/IP: SETTING NODE_OFFSET TO ASSIGN
SPECIFIC DEVICE INST ANCES
After setting a local PC to the same subnet as the ProtoNode (
Section
), open a web browser
on the PC and enter the IP Address of the ProtoNode; the default address is 192.168.1.24.
o
If the IP Address of the ProtoNode has been changed by previous configuration, the
assigned IP Address must be gathered from the network administrator.
o
The Web Configurator is displayed as the landing page. (
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_ Modbus Node_ID
For example, if the desired Device Instance for the 1
st
device is 1,001 and the following is true:
-
Device 1 has a Modbus Node-ID of 1
-
Device 2 has a Modbus Node-ID of 22
-
Device 3 has a Modbus Node-ID of 33
Then plug the 1
st
device information into the formula to find the desired Node_Offset:
1,001 = Node_ 1
1,000 = Node_Offset
Once the Node_Offset value is input, it will be applied to all devices as shown below:
-
Device 1 Instance = 1,000 + Modbus Node_ID = 1,000 + 1 = 1,001
-
Device 2 Instance = 1,000 + Modbus Node_ID = 1,000 + 22 = 1,022
-
Device 3 Instance = 1,000 + Modbus Node_ID = 1,000 + 33 = 1,033
Click “Submit” once the desired value is entered.
Figure 22: Web Configurator Screen
