Schneider Electric 4000 manual Priorities Alarm Levels, Alarms About Alarms

63230-300-212 April 2001

Priorities

Alarm Levels

Chapter 6—Alarms

About Alarms

Each alarm also has a priority level. Use the priorities to distinguish between events that require immediate action and those that do not require action.

•High priority—if a high priority alarm occurs, the display informs you in two ways: the LED on the display flashes until you acknowledge the alarm and a message displays while the alarm is active.

•Medium priority—if a medium priority alarm occurs, the LED flashes and a message displays only while the alarm is active. Once the alarm becomes inactive, the LED stops flashing.

•Low priority—if a low priority alarm occurs, the LED on the display flashes only while the alarm is active. No alarm message is displayed.

•No priority—if an alarm is setup with no priority, no visible representation will appear on the display. Alarms with no priority are not entered in the Alarm Log. See Chapter 7—Loggingfor alarm logging information.

If multiple alarms with different priorities are active at the same time, the display shows the alarm message for the last alarm that occurred. For instructions on setting up alarms from the circuit monitor display, see “Setting Up and Editing Alarms” on page 21.

From the display or SMS, multiple alarms can be set up for one particular quantity (parameter) to create alarm “levels”. You can take different actions depending on the severity of the alarm.

For example, you could set up two alarms for kW Demand. A default alarm already exists for kW Demand (no. 26 in the alarm list), but you could create another custom alarm for kW Demand, selecting different pickup points for it. The custom kW Demand alarm, once created, will appear in the standard alarm list. For illustration purposes, let’s set the default kW Demand alarm to 120 kW and the new custom alarm to 150 kW. One alarm named kW Demand ; the other kW Demand 150kW as shown in Figure 6–3.Note that if you choose to set up two alarms for the same quantity, use slightly different names to distinguish which alarm is active. The display can hold up to 15 characters for each name. You can create up to 10 alarm levels for each quantity.

kW Demand

150		Alarm #43 Pick Up	Alarm # 43 Drop Out
140
130	Alarm #26 Pick Up			Alarm #26 Drop Out
120
100

			Time
Demand OK Approaching	Peak Demand	Below Peak Demand OK
Peak Demand	Exceeded	Demand
kW Demand (default)		kW Demand 150kW (custom)
Alarm #26 kW Demand with		Alarm #43 kW Demand with
pickup of 120 kWd, medium priority		pickup of 150 kWd, high priority

Figure 6–3: Two alarms set up for the same quantity with different pickup and dropout set points

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