Liebert 1000kVA manual History Status, History status report screens

Operation

History Status

The History Status screen displays 64 frames, of 4 milliseconds each, from the Present Status screen. Note that the values for output volts and amps are updated once each millisecond. Alarms are listed in the sequence they occurred, within 1 millisecond resolution. The frames are stored in a buffer (a computer information storage technique). The buffer stores the frames in a first in, first out sequence. As a new frame enters the buffer the oldest one is released.

When a designated fault occurs (see list below), the buffer stores information for the next 24 frames and then freezes (stops gathering information). At that time, the History Status screen contains

40 frames before the fault, the frame when the fault occurred and 23 frames after the fault. This

64-page report is a very useful diagnostic tool for the operator or Liebert Global Services. Use the Up and Down pads to view the screens.

Figure 25 History status report screens

	HISTORY STATUS		MODULE-0		04/10/97	16:49:21 FRAME 36
	ORDER - 000000 SITE ID - 00000			SITE TAG - 0000000
**** ACTIVE ALARMS ****		Output Ov-volts
		A	B	C	DC	LOAD	HERTZ TIME
OUTPUT VOLTS		480	480	480
OUTPUT AMPS		420	420	420
OUTPUT FREQUENCY						349	60.0
LOAD KVA		480	480	480
BYPASS VOLTS
						UP	: NEXT FRAME
						DOWN : PREVIOUS FRAME
						SELECT : EXIT
HISTORY STATUS		MODULE-0		01/17/98		11:21:59	FRAME 100

ORDER - 000000 SITE ID - 00000			SITE TAG - 0000000
**** ACTIVE ALARMS ****	Batt Discharging			Low Batt Warning
OUTPUT VOLTS	A	B	C	DC LOAD	HERTZ TIME
	480	480	480
OUTPUT AMPS	325	325	325
OUTPUT FREQUENCY					60.0
OUTPUT VOLTS	480	480	480
OUTPUT AMPS	325	325	325	390
BATTERY VOLTS					0:01
OUTPUT VOLTS	480	480	480
OUPUT AMPS	325	325	325	-645
BATTERY AMPS
INPUT VOLTS	0	0	0
INPUT AMPS	0	0	0		UP : NEXT FRAME
OUPUT VOLTS	480	480	480
					DOWN : PREVIOUS FRAME
OUTPUT AMPS	325	325	325
LOAD KVA				270
					SELECT : EXIT

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