Instruction Manual

i.LON 100 Internet Server Programmer’s Reference 7-9

Property Description

Optional. These properties define the Alarm Generator’s alarm data points.

Each data point must be referenced by the <UCPTpointName> assigned to

it in the Data Server. The data point chosen for the <AlarmDataPoint>

must use the format type SNVT_alarm. The data point chosen for the

<Alarm2DataPoint> must use the format type UNVT_alarm2.

Use a SNVT_alarm data point if your system can handle this LonMark

standard type for alarming. Use a UNVT_alarm2 data point if your system

will require the additional information you can provide with the

<UCPTalarm2Description> property. If your system can directly access the

<UCPTpointStatus> property of the input data point, you may not need to

use alarm data points, as your Alarm Generators will update the input

data point to an alarm status each time they generate an alarm. You can

read this property from a data point with the DataPointRead or

DataServerRead functions.

The <UCPTpointSatus> of the alarm data points will be updated to the

status AL_ALM_CONDITION when an alarm is generated, unless the

<UCPTcompFunction> is FN_LIMIT. In this case, the status will be

updated to any of four alarm statuses, based on the offset limit that caused

the alarm. For more information on this, see Hysteresis Levels and Offset

Limits on page 7-13.

You can register these alarm data points with the Alarm Notifier

application to generate alarm notifications and e-mail messages each time

they are updated to an alarm status. For more information on this, see

Alarm Notifier on page 8-1.

Specifies the function that the Alarm Generator will use to compare the

values of the input data point and the compare data point. For descriptions

of the comparison functions you can use, see Comparison Functions on

page 7-12.

Specifies the time period an alarm condition must exist before the Alarm

Generator will consider it a valid alarm and generate an alarm. You must

use the following format for this property:

DAYS HOURS:MINUTES:SECONDS.MILLISECONDS

For example, 0 1:12:12.333 indicates a time period of 1 hour, 12 minutes

and 12.333 seconds. The maximum value you can enter is:

0 1:59:59.999

The default value is:

0 00:00:00.000