Echelon LonBridg Server Manual de usuario descargar pdf (Pagina 31)

LonBridge Server User’s Guide 25

retrieves the id attribute; you can also view the id attribute in the devices.xml

file (see

Instances Directory

on page 16).

Expressions

Expressions are used in the where attribute of the <get> message. The

conditional operators include:

• and

• or

• >

• >=

• ==

• !=

Operators are processed from left to right. However, you can use parentheses to

group conditions.

Tracers

tracer

is a special attribute that you can use to identify a specific message, so

that the LonBridge application can filter the message response from other

responses it receives. A tracer is any attribute that includes an underscore (_)

prefix. You can use tracers for LonBridge API messages (called

message tracers

)

or for a LonBridge device class file (called

node tracers

Example for a message tracer:

<o43.get _mytraceid="34"

_mytracetimestamp="090803121356"/>

</lon>

...

<o43.is brightness="100" _mytraceid="34"

_mytracetimestamp="090803121356"/>

</lon>

Subsequent queries do not return the same tracers:

<lon>

<o43.get/>

</lon>

...

<lon>

<o43.is brightness="100"/>

</lon>

Errors

The LonBridge Server reports errors using the <error> element. The <error>

element contains a message that describes the error. There are no fixed

attributes for the <error> element.

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 66 67

Comentarios a estos manuales

Sin comentarios

Echelon LonBridg Server Manual de usuario Pagina 31

Comentarios a estos manuales

Relacionado con productos y manuales para Software Echelon LonBridg Server