Echelon SmartServer 2.2 - Manual (Page 339)

340 Alarming
Value of input point goes
above the Alarm High Limit. AL_HIGH_LMT_ALM2 Yes Updated to the more
severe high alarm
condition.
Value of input point changes,
but remains above the Alarm
High Limit. AL_HIGH_LMT_ALM2 No Remains at the high
alarm condition, as the
data point has not
reached the specified
hysteresis level for that
condition.
Value of input point goes
below the hysteresis level
defined for the Alarm High
Limit. AL_HIGH_LMT_ALM1 No Returned to the high
warning condition.
Value of input point goes below
the hysteresis level defined for
the Warning High Limit. AL_NO_CONDITION No Retuned to normal
condition
4. Configure the following alarm properties:
Warning/Alarm Set
Delay Enter the period of time (in seconds) that the alarm condition must exist to
generate an alarm.
Warning/Alarm
Clear Delay Enter the period of time (in seconds) that the normal condition must exist to
clear an alarm.
Poll Rate Enter how frequently (in seconds) the Alarm Generator polls the
SmartServer’s internal data server for the values of the selected input point
and the compare point (if a data point). You must enter a non-zero value;
otherwise polling is disabled.
Poll Delay After
Power On Enter the period of time (in seconds) that the Alarm Generator waits after it
has been reset before polling the input point and the compare point (if a data
point).
Alarm Inhibit Time
After Power On Enter the period of time (in seconds) that the Alarm Generator waits after it
has been reset before triggering alarms.
5. Click Submit.
Selecting SNVT_alarm Output Data Points
After you have selected an input point, a compare point, and a comparison function, you can select
SNVT_alarm and/or SNVT_alarm_2 output data points to be updated to an alarm condition when an
alarm is generated. This means that you can check the status of an input point, or one of the
SNVT_alarm or SNVT_alarm_2 output data points to determine whether an alarm has been
generated. You can also create an Alarm Notifier to send an alarm notification each time the input
point or either of the SNVT_alarm and SNVT_alarm_2 output data points is updated to an alarm
condition as described in the next section, Using the Alarm Notifier.
To select the SNVT_alarm and/or SNVT_alarm_2 output data points to be updated to an alarm
condition, follow these steps:
1. Select the Use SNVT_alarm Output and/or the Use SNVT_alarm_2 Output check box.
2. Click the data point icon ( ) directly below the Use SNVT_alarm Output check
box to select a SNVT_alarm data point. Click the data point icon directly above the Use
SNVT_alarm_2 Output check box to select a SNVT_alarm_2 data point, and then select
whether you are using a SNVT_alarm_2 or a UNVT_alarm_2 data point from the list.