Viconics VT7200 (Echelon) Integration Manual - Manual (Page 25)

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Network adapter
Although network connections are polarity insensitive, it is good practice to keep polarity consistent throughout
the entire site. Figure 4 shows a network connection example and the location of the Status LED. This Status
LED may help to troubleshoot network problems.
Figure 4: Network connections and location of the Status LED on a LON module
Table 2 shows the different possibilities with the Status LED behaviour of the LON module.
Condition of the Status LED Explanation
Continuously ON The device has no application loaded in its memory and is
Un-configured
Flashing at a rate of 1/2Hz The device has an application loaded in its memory but is
Un-configured. When a device is in the un-configured state, it
does not know which devices to communicate with. A
network management tool is used to logically bind the node
to another in a LonWorks network.
Continuously OFF The device has an application loaded into its memory and is
bound onto a LonWorks network.
Table 2: Status LED condition
Software Files
XIF: When binding a node onto the network, an XIF file is needed. The XIF file has information that is used by
the network management tool to help ease the installation and maintenance process of a node. It is also used
for offline configuration of the node.
APB and NXE: When running an application program associated with a XIF file, an APB or NXE file is needed.
Please note that the thermostats have the APB file already flashed from the factory.
Device Resource File (DRF): When a LON network management tool is used; a DRF file must be installed.
DRF files are needed to display special manufacturer defined variables or configurations correctly.
• Please note that all release notes for the XIF, APB & NXE software files will be included under the
following folder name on your hard drive: C:\LonWorks\Import\Viconics. The name of the file is:
VT7xxxReadme.txt
Plug-Ins File: LNS Plug-Ins simplify start-up, maintenance, configuration and reduce the installation effort.
• Please note that all release notes for Plug-Ins files will be included under the following folder
name on your hard drive: C:\LonWorks\Plug-Ins\Viconics\VT7xxx. The name of the file is:
Readme.txt.
• All the latest software files can be downloaded from VICONICS’ web site at
http://www.viconics.com