System Operation
Copyright © 2007-2011 Eaton Corporation. All Rights Reserved.
IPN 997-00012-50H November 2011
Smart Alarms
Smart Alarms are a software simulation of logic gates to allow the logical combination of other
alarms, time schedules and/or system values. Up to 32 Smart Alarms can be configured.
A single Smart Alarm is the equivalent of a multi-input AND, OR or XOR logic gate. More
complex logic arrangements are created by using one Smart Alarm as an input into another. For
example:
Two input AND gate:
SAx = Sa AND Sb
Three input OR gate:
SAy = Sa OR Sb OR Sc
Multi-gate logic:
SAz = SAx OR NOT Sd
One input is Smart Alarm SAx (output
from another gate). The other input is
negated. This is available with Alarm
Sources only.
Key:
SAx, SAy, SAz are Smart Alarms (entered in the Smart Alarms table).
Sa, Sb, Sc, Sd are the Sources (entered in the Alarm Sources, Schedule Sources or System Value
Sources tables).
Smart Alarms also have optional activation and deactivation delays. When activated they can
cause alarm indications (unless Severity is set to Control) and can activate one or two digital
outputs (in the same way as other alarms).
For more information and application examples contact your Eaton DC product supplier and
request Eaton Application Note AN0106, SC200 Version 3 Advanced Alarm Features.
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