Rockwell Automation 1440-VSE02-01RA XM-122 gSE Vibration Module - Manual (Page 86)

Publication GMSI10-UM013D-EN-P - May 2010
76 Configuration Parameters
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," the measurement is a phase measurement
(Configuration Utility), or the alarm type is a vector
alarm (EDS file).
Same measurement unit as Output
Data Unit selection for the specified
channel except when
measurement/alarm type is phase
(vector).
Phase Measurements/Vector Alarm
Type Requirements:
•
The Alert Low, Danger Low, Alert
High, and Danger High must define
contiguous sections within the set
of possible phase values (0 to 360
degrees).
•
If you were to plot the thresholds on
a clock face (illustration below) with
phase increasing in the clockwise
direction, then
•
Alert Low must be clockwise
from or equal to Danger Low.
•
Alert High must be clockwise
from Alert Low.
•
Danger High must be clockwise
from or equal to Alert High.
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," the measurement is a phase measurement
(Configuration Utility), or the alarm type is a vector
alarm.
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).
Same measurement unit as Output
Data Unit selection for the specified
channel.
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