Echelon LonBridg Server - Manual (Page 44)

38 LonBridge Device Class File
Attribute Description Required?
output For an input network variable, defines the
bytes to be put on the L ON W ORKS network
for this byte.
For an output network variable, defines the
LonBridge XML value used to set the
device.
Optional
value Defines the value of the byte, if any. Optional
Example:
<nvs>
<nv ... >
<byte ... >
<attribute name="state" enum="true">
<enum input="off" output="0" />
<enum input="on" output="1" />
</attribute>
</byte>
</nv>
</nvs>
<nv>
The <nv> element defines the bytes that are sent on the L ON W ORKS network
for a network variable update to the device.
Table 12 lists the attributes for the <nv> element.
Table 12. Attributes for the <nv> Element
Attribute Description Required?
direction Defines whether the network variable is an
input NV or an output NV. This attribute
is device-centric.
Required
index Correlates the network variable index on
the device with the network variable
defined in the class file.
Required
size Defines the size of the network variable
update.
Example: To turn on a SNVT_switch
network variable, you send a two byte
message (one byte represents the
brightness and the other byte represents
the state). The size attribute for this NV is
2.
Optional