This object contains the threshold value for the
cePfePerfCurrent5MinEfficiency object. If during the last 5
minute measurement period the cePfePerfCurrent5MinEfficiency
object becomes less than or equal to this threshold value,
an event of type 'thld5MinEfficiencyEvent' will be genera-
ted.
Value of zero indicates that no comparison is being made
between the cePfePerfCurrent5MinEfficiency object value and
the threshold value, therefore no event action will be gene-
rated.