| Description | The method of sampling the selected variable and
calculating the value to be compared against the thresholds.
If the value of this object is absoluteValue(1), the value
of the selected variable will be compared directly with the
thresholds at the end of the sampling interval. If the
value of this object is deltaValue(2), the value of the
selected variable at the last sample will be subtracted from
the current value, and the difference compared with the
thresholds.
If the associated cHcAlarmVariable instance could not be
obtained at the previous sample interval, then a delta
sample is not possible, and the value of the associated
cHcAlarmValueStatus object for this interval will be
valueNotAvailable(1).
This object may not be modified if the associated
cHcAlarmStatus object is equal to active(1). |