Rockwell-automation 20-750-BNETIP BACnet/IP Option Module Manual de usuario Pagina 28

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28 Rockwell Automation Publication 750COM-UM005B-EN-P - June 2014
Chapter 3 Configuring the Option Module
Setting the Device Instance
A BACnet Device Instance number is used to identify a BACnet device over the
BACnet network. A Device Instance number must be unique across all subnets
and routed links.
The Device Instance number could be configured depending upon the adopted
network strategy. For example Figure 3
shows a Building level network having
two individual floor networks through a router which allows devices on each
network to share the same IP address. Each device on the network in this example
has a unique Device Instance number consisting of 4 digits. The first digit
represents the Building or Floor number. The last 3 digits represent the fourth
octet of the device’s IP address.
Figure 3 - Building Automation Network Example
1. Set the value of Device Parameter 18 [Device Instnc] to a unique
Device Instance number.
This Device Instance number should not be repeated within a BACnet
network. By default, the Device Instance number is set to 100.
2. Reset the option module; see Resetting the Option Module
on page 33 so
that the new Device Instance number takes effect.
Building Level Network 1
Floor Level Network 1 (BACnet IP)
Building Level Network 2
Building
Controller 1
Other Brand
Building Automation
Product
IP Add. 192.168.120.121
Device Instance
1001
IP Add. 192.168.120.122
Device Instance 1002
IP Add. 192.168.120.123
Device Instance 1050
IP Add. 192.168.120.124
Device Instance 1127
Other Brand
Building Automation
Product
Router
Bldg 1/Flr 1
Building
Controller 2
Floor Level Network 1 (BACnet IP)
Other Brand
Building Automation
Product
IP Add. 192.168.112.211
Device Instance 2001
IP Add. 192.168.112.212
Device Instance 2002
IP Add. 192.168.112.213
Device Instance 2050
IP Add. 192.168.112.214
Device Instance 2127
Other Brand
Building Automation
Product
Bldg 2/Flr 2
Stopped
0.00 Hz
0 << 65535
ESC
ENTER
AUTO
F
Edit Device Instnc
100
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