Schneider Electric PM820, PM870, PM810, PM850 manual Priorities, Viewing Alarm Activity and History

63230-500-225A2	PowerLogicTM Series 800 Power Meter
3/2011	Chapter 6—Alarms

Priorities

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 backlight on the display flashes until you acknowledge the alarm and the alarm icon blinks while the alarm is active.

•Medium priority—if a medium priority alarm occurs, the alarm icon blinks only while the alarm is active. Once the alarm becomes inactive, the alarm icon stops blinking and remains on the display.

•Low priority—if a low priority alarm occurs, the alarm icon blinks only while the alarm is active. Once the alarm becomes inactive, the alarm icon disappears from the display.

•No priority—if an alarm is set up 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 power meter display, see “ALARM (Alarms) Setup” on page 17.

Viewing Alarm Activity and History

1.Press ###: until ALARM is visible.

2.Press ALARM.

3.View the active alarm listed on the power meter display. If there are no active alarms, the screen reads, “NO ACTIVE ALARM.”

4.If there are active alarms, press

<--or -->to view a different alarm.

5.Press HIST.

6.Press <--or -->to view a different alarm’s history.

7.Press 1; to return to the SUMMARY screen.

PLSD110258

Types of Setpoint-controlled Functions

This section describes some common alarm functions to which the following information applies:

•Values that are too large to fit into the display may require scale factors. For more information on scale factors, refer to “Changing Scale Factors” on page 91.

•Relays can be configured as normal, latched, or timed. See “Relay Output Operating Modes” on page 40 for more information.

•When the alarm occurs, the power meter operates any specified relays. There are two ways to release relays that are in latched mode:

—Issue a command to de-energize a relay. See Appendix C—Using the Command Interface on page 83 for instructions on using the command interface, or

—Acknowledge the alarm in the high priority log to release the relays from latched mode. From the main menu of the display, press ALARM to view and acknowledge unacknowledged alarms.

The list that follows shows the types of alarms available for some common alarm functions:

NOTE: Voltage based alarm setpoints depend on your system configuration. Alarm setpoints for 3-wire systems are VL-Lvalues while 4-wire systems are VL-Nvalues.

© 2011 Schneider Electric. All Rights Reserved. 47