Echelon i.LON 100 e2 Internet Server - Manual (Page 96)

i. LON 100 Internet Server Programmer’s Reference 7-7
Property Description
Specifies the alarm priority that will be reported in the priority_level field
of the alarm data points for the Alarm Generator. The alarm priority is
independent of the alarm type. For a list of valid alarm priorities, see
Alarm Priority Levels on page 7-11.
The time period to wait after enabling or starting the application before
polling the value of the input data point. This field has a range of 0.0-
6553.0 seconds.
When the default value of 0.0 seconds is used, the Alarm Generator will
resume polling the input data point at the interval specified by the
property immediately after a reset.
The poll rate for the input and compare data points, in seconds. When this
value is greater than 0, the Alarm Generator will poll the values of the
input and compare data points each time this interval expires. This field
has a range of 0-214,748,364 seconds.
When this value is 0, the Alarm Generator will not poll the value of the
input and compare data points, and will only check for alarm conditons
when it receives event-driven updates to the data points.
You should note that other i. LON 100 applications may cause the Data
Server to poll this data point’s value as well. The poll rate specified by
these applications should be compatible with each other. For example, if an
Alarm Generator is polling a data point every 15 seconds, and the Data
Logger is polling that data point every 10 seconds, then the Data Server
will have to poll the value of the data point every five seconds to ensure
that each application gets a current value for each poll.
It is important to note this as you set poll rates for various applications, as
you may end up causing more polls than is efficient on your network. For
example, if an Alarm Generator is polling a data point every 9 seconds and
a Data Logger is polling a data point every 10 seconds, the Data Server
would have to poll the data point every second to ensure that each
application polls for a current value. This may create a significant amount
of undesired traffic.
Optional. Enter the description field of the UNVT_alarm2 data point
selected for the Alarm Generator. This data point can be selected by
defining the property. This description could include
the value that increased and caused the alarm, an alarm or error code
defined by the manufacturer, or the alarm limit. This can be a maximum of
22 characters long, and will be inserted in the description field of the
UNVT_alarm2 data point each time an alarm is generated.