Echelon LonBridg Server Manual de usuario descargar pdf (Pagina 44)

38 LonBridge Device Class File

Attribute Description Required?

output For an input network variable, defines the

bytes to be put on the L

ONWORKS 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>

</attribute>

</byte>

</nv>

</nvs>

<nv>

The <nv> element defines the bytes that are sent on the L

ONWORKS 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

Optional

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Echelon LonBridg Server Manual de usuario Pagina 44