Rockwell Automation 1440-TPS02-01RB XM-320 Position Module - Manual (Page 65)

Publication GMSI10-UM005C-EN-P - May 2010
Configuration Parameters 57
Hysteresis The amount that the measurement 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
(pushbutton disengaged or toggle switch flipped to
off). Enter a value from 0 to 1092 minutes,
adjustable in increments of 0.1
minutes.
Threshold Multiplier The action to take when the setpoint multiplier
switch is closed (pushbutton engaged or toggle
switch flipped to on) and during the startup period
once the switch is reopened. The module applies the
multiplier to the alarm thresholds during this time to
avoid false alarms at resonance frequencies.
Note: The multiplication may have the opposite of
the intended affect under certain circumstances. For
example, if the Condition is set to "Less Than" and
the thresholds are positive, then multiplication of the
threshold values increases the likelihood of the
measured value being within the alarm range.
Therefore, you may want to disable the alarms
during the startup period.
Enter any fractional value between 0
and 10.
Enter 0 (zero) to disabled the alarm
during the startup period.
Alarm Parameters
Parameter Name Description Values/Comments