Rockwell Automation 1440-VAD02-01RA XM-123 Aeroderivative Module - Manual (Page 70)

Publication GMSI10-UM003D-EN-P - May 2010
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Alert Threshold (High) The threshold value for the alert (alarm) condition.
Note: This parameter is the greater threshold value
when Condition is set to "Inside Range" or "Outside
Range."
Danger Threshold (High) The threshold value for the danger (shutdown)
condition.
Note: This parameter is the greater threshold value
when Condition is set to "Inside Range" or "Outside
Range."
Alert Threshold (Low) The lesser threshold value for the alert (alarm)
condition.
Note: This parameter is not used when Condition is
set to "Greater Than" or "Less Than."
Danger Threshold (Low) The lesser threshold value for the danger (shutdown)
condition.
Note: This parameter is not used when Condition is
set to "Greater Than" or "Less Than."
Hysteresis The amount that the measured value must fall
(below the threshold) before the alarm condition is
cleared. For example, Alert Threshold = 120 and
Hysteresis = 2. The alarm (alert) activates when the
measured value is 120 and will not clear until the
measured value is 118.
Note: The Alert and Danger Thresholds use the
same hysteresis value.
Note: For the Outside Range condition, the
hysteresis value must be less than Alert Threshold
(High) – Alert Threshold (Low).
Startup Period The length of time that the Threshold Multiplier is
applied to the thresholds. The startup period begins
when the setpoint multiplier switch is reopened
(push button disengaged or toggle switch flipped to
off). Enter a value from 0 to 1092 minutes,
adjustable in increments of 0.1
minutes.
Alarm Parameters
Parameter Name Description Values/Comments