LAARS’ ProtoNode Startup Guide
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5
BACNET MS/TP AND BACNET/IP: SETTING NODE_OFFSET TO ASSIGN
SPECIFIC DEVICE INSTANCES
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After setting your PC to be on the same subnet as the ProtoNode (Section 4.1), open a web
browser on your PC and enter the IP address of the ProtoNode; the default address is
192.168.1.24.
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The Web Configurator will be displayed as your landing page. (
Figure 19
)
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Node_Offset field will be presented displaying the current value (default = 50,000).
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Change the value of Node_Offset to establish the desired Device Instance values, and click
SUBMIT.
o
Given that: Device Instance = Node_ A Bank Setting
o
Then:
Node_Offset (required) = Device Instance (desired) – A Bank Setting
For example:
o
Device 1 has a Modbus Node-ID of 1
o
Device 2 has a Modbus Node-ID of 2
o
Device 3 has a Modbus Node-ID of 3
o
“A” Bank DIP switches setting = 11
o
Desired Device Instance for 1
st
device = 1,011
o
Node_Offset (required) = 1,011 – (A Bank Setting) = 1,011 – 11 = 1,000
o
The Node_Offset value will be applied to all devices.
o
Device 1 Instance will then be = 1,000 + A Bank Setting = 1,000 + 11 = 1,011
o
Device 2 Instance will then be = Previous Value + 1 = 1,011 + 1 = 1,012
Device 3 Instance will then be = Previous Value + 1 = 1,012 + 1 = 1,013
Figure 19: Web Configurator screen
LAARS Heating Systems
Page 24 of 43
20
Industrial Way, Rochester, NH, USA 03867
•
(800) 900-9276
•
www.Laars.com
