AERCO ProtoNode FPC-N34 & FPC-N35 User Manual
CHAPTER 2 – BACnet/LonWorks Setup
OMM-0107_0B
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
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03/07/2017
Figure 2-7: MAC Address DIP Switches
NOTE:
When setting DIP Switches, please ensure that power to the board is OFF.
NOTE
A MAC address
greater
than 127 will cause the ERR LED to light and will
disable the ProtoNode from being discovered by the BAS. Either set the
MAC address to 127 or lower, or change the “MAX MAC” on the
Configuration page.
2.5.2
BACnet MS/TP and BACnet/IP (FPC-N34): Setting the Device Instance
•
The BACnet Device Instances will be calculated by adding the Node_Offset (default
value is 50,000) to the device’s Modbus Node ID (that was assigned in Section 2.3.2).
•
The BACnet Device Instance can range from 1 to 4,194,303.
For example:
Node_Offset value (default) = 50,000
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
Given that: Device Instance = Node_ Modbus Node_ID
o
Device Instance, Device 1 = 50,000 + 1 = 50,001
o
Device Instance, Device 2 = 50,000 + 2 = 50,002
o
Device Instance, Device 3 = 50,000 + 3 = 50,003
2.5.2.1 BACnet MS/TP or BACnet/IP: Assigning Specific Device Instances
With the default Node_Offset value of 50,000 the Device Instances values generated will be
within the range of 50,001 to 50,127.
•
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.
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Methods for changing the Node_Offset value are provided in Chapter 5
o
This step cannot be performed until after the unit is connected and powered.
