Chapter 6—Alarms 63230-300-212
About Alarms April 2001
©20 01 Schneider Electric All Rights Reser ved
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Figure 6–1: Sample alarm log entry
Figure 6–2: How the circuit monitor handles setpoint-drivenalarms
EV1—The circuitmonitor records the date and time that the pickupsetpoint
and time delaywere satisfied, and the maximum value reached (Max1)
during the pickupdelay period (∆T). Also, the circuit monitorperforms any
tasks assignedto the event such as waveform captures or forceddata log
entries.
EV2—Thecircuit monitor records the date and time that the dropout setpoint
and time delaywere satisfied, and the maximum value reached (Max2)
during the alarm period.
Thecircuit monitor also storesa correlation sequence number (CSN)for each
event(such as
Under VoltagePhase A Pickup, Under Voltage PhaseA
Dropout
). The CSNlets you relate pickups and dropoutsin the alarm log. You
cansor t pickupsand dropouts by CSN to correlate the pickupsand dropouts
of a particular alarm. The pickupand dropout entries of an alarm will have
the same CSN. You canalso calculate the duration of an eventby looking at
pickupsand dropouts with the same CSN.
(EV2)
(EV1)
(Max2)
(Max1)
EV1 EV2Max1Max2∆T∆T