Echelon LonBridg Server Manual de usuario descargar pdf (Pagina 41)

LonBridge Server User’s Guide 35

Attribute Description Required?

length Defines the length of an input network

variable.

Example: For a network variable with a

length of 2, the <byte> element maps

attributes to bytes 0 and 1.

Optional

name Defines the name for the attribute. Required

scale Defines a percentage by which to scale the

value.

Example: If the server reads a value of 200

from a device while polling brightness, and

it has a scale value of 50 for that byte, then

the LonBridge XML for messages will

display the brightness as 100 (50% of 200 is

100).

Optional

value Defines an absolute value for the byte to be

updated for a network variable.

The value attribute is used only for input

network variables.

Optional

Example 1:

<nvs>

</nvs>

</attribute>

</attributes>

Example 2:

<nvs>

</attribute>

</byte>

</nv>

</nvs>

The <attributes> element is a container element for the device attributes that

are present on the device. It also contains the network variables that are

used for input and output.

At least one <attribute> element, with one or more <nv> elements within the

<nvs> element, must be defined for a specific <attributes> element.

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Echelon LonBridg Server Manual de usuario Pagina 41