Schneider Electric 4000 manual Disturbance, Boolean

Chapter 6—Alarms	63230-300-212
Alarm Conditions and Alarm Numbers	April 2001

Table 6–4:	Alarm Types
Type	Description	Operation
		The leading power factor alarm will occur when the test register value becomes more leading than
		the pickup setpoint (closer to 0.010) and remains more leading long enough to satisfy the pickup
		delay period. When the value becomes equal to or less leading than the dropout setpoint, that is
054	Leading Power Factor	1.000, and remains less leading for the dropout delay period, the alarm will dropout.Both the pickup
		setpoint and the dropout setpoint must be positive values representing leading power factor. Enter
		setpoints as integer values representing power factor in thousandths. For example, to define a
		dropout setpoint of 0.5, enter 500. Delays are in hundreds of milliseconds.
		The lagging power factor alarm will occur when the test register value becomes more lagging than
		the pickup setpoint (closer to –0.010) and remains more lagging long enough to satisfy the pickup
		delay period. When the value becomes equal to or less lagging than the dropout setpoint, that is.
055	Lagging Power Factor	1.000 and remains less lagging for the dropout delay period, the alarm will dropout. Both the pickup
		setpoint and the dropout setpoint must be positive values representing lagging power factor. Enter
		setpoints as integer values representing power factor in thousandths. For example, to define a
		dropout setpoint of –0.5, enter 500. Delays are in hundreds of milliseconds.
Disturbance

080

090

	The voltage and current swell alarms will occur whenever the continuous rms calculation is above
	the pickup setpoint and remains above the pickup setpoint for the specified number of cycles. When
Voltage/Current Swell	the continuous rms calculations fall below the dropout setpoint and remain below the setpoint for
	the specified number of cycles, the alarm will dropout. Pickup and dropout setpoints are positive
	and delays are in cycles.
	The voltage and current sag alarms will occur whenever the continuous rms calculation is below
	the pickup setpoint and remains below the pickup setpoint for the specified number of cycles. When
Voltage/Current Sag	the continuous rms calculations rise above the dropout setpoint and remain above the setpoint for
	the specified number of cycles, the alarm will drop out. Pickup and dropout setpoints are positive
	and delays are in cycles.

Digital

060

061

070

	The digital input transition alarms will occur whenever the digital input changes from off to on. The
Digital Input On	alarm will dropout when the digital input changes back to off from on. The pickup and dropout
	setpoints and delays do not apply.
	The digital input transition alarms will occur whenever the digital input changes from on to off.The
Digital Input Off	alarm will dropout when the digital input changes back to on from off. The pickup and dropout
	setpoints and delays do not apply.
Unary	This is a internal signal from the circuit monitor and can be used, for example, to alarm at the end
	of an interval or when the circuit monitor is reset. The pickup and dropout delays do not apply.

Boolean

100

101

102

103

104

Logic AND

The AND alarm will occur when all of the combined enabled alarms are true (up to 4). The alarm will dropout when any of the enabled alarms drops out.

Logic NAND

The NAND alarm will occur when any, but not all, or none of the combined enabled alarms are true. The alarm will dropout when all of the enabled alarms drop out, or all are true.

Logic OR

The OR alarm will occur when any of the combined enabled alarms are true (up to 4). The alarm will dropout when all of the enabled alarms are false.

Logic NOR

The NOR alarm will occur when none of the combined enabled alarms are true (up to 4). The alarm will dropout when any of the enabled alarms are true.

Logic XOR

The XOR alarm will occur when only one of the combined enabled alarms is true (up to 4). The alarm will dropout when the enabled alarm drops out or when more than one alarm becomes true.

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