63230-300-212 Chapter6—Alarms
April 2001 About Alarms
87
© 2001 Schneider Electric All Rights Reserved
Eachalar malso has a priority level. Use thepriorities to distinguish between
eventsthat require immediate action and those that do not require action.
•High priority—ifa high priority alarm occurs, the display informs you in
twoways: the LED on the displayflashes until you acknowledge the alarm
and a message displayswhile the alarm is active.
•Mediumpriority—if a medium priority alarm occurs, the LED flashesand
a message displaysonly while the alarm is active. Once the alarm
becomes inactive,the LED stops flashing.
•Low priority—ifa low priority alarm occurs, the LED on the display
flashes only whilethe alarm is active. No alarm message is displayed.
•Nopriority—ifan alarm is setup with no priority,no visiblerepresentation
will appear on the display.Alarms with no priority are not entered in the
Alarm Log. See Chapter 7—Logging foralar m logginginformation.
If multiplealar mswi thdifferent priorities are active at the same time, the
displayshows the alarm message for the last alarm that occurred. For
instructionson setting up alarms from thecircuit monitor display,see “Setting
Up and Editing Alarms ”onpage 21.
From the display or SMS, multiplealarms can be set up for one particular
quantity (parameter)to create alarm “levels”. Youcan take different actions
depending on the severityof the alarm.
For example,you could set up two alarms for kW Demand. A default alarm
already existsfor kW Demand (no. 26 in the alarm list), but you could create
anothercustom alarm for kW Demand, selecting differentpickup points for it.
The custom kW Demand alarm, once created,will appear in the standard
alarm list.For illustration purposes, let’sset the default kW Demand alarm to
120 kW and the new customalarm t o 150 kW.One alarm named
kWDemand
; the other
kW Demand150kW
as shownin Figure 6–3. Note that if
you chooset o setup two alarms for the same quantity, use slightlydifferent
names to distinguishwhich alarm is active. The display can hold up to 15
charactersfor each name. You can create up to10 al arm levelsfor each
quantity.
Figure 6–3: Two alarms set up for the same quantity with different
pickup and dropoutset points
Priorities
Alarm Levels
100
120
130
140
150 Alar m #43 Pick Up
Alarm #26 Pick Up Alarm #26 Drop Out
Alarm # 43 Drop Out
kW Demand
kW Demand (default)
Alarm #26 kW Demand with
pickup of 120 kWd, medium priority
kW Demand 150kW (custom)
Alarm #43 kW Demand with
pickup of 150 kWd, high priority
Time
Demand OK Demand OK
Approaching
Peak Demand
Below Peak
Demand
Peak Demand
Exceeded