Rockwell Automation 1440-SPD02-01RB XM-220 Dual Speed Module - Manual (Page 60)

Publication GMSI10-UM004B-EN-P - May 2010
52 Configuration Parameters
Alert Threshold (High) The threshold value for the alert (alarm) condition.
Important: For Locked Rotor alarms, the Alert
Threshold value must be less than or equal to the
Danger Threshold value.
Note: This parameter is the greater threshold value
when Condition is set to "Inside Range" or "Outside
Range."
The thresholds shall be specified in
the units of the associated
measurement (for example, RPM for
speed, RPM/min for acceleration).
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).
The hysteresis shall be specified in
the units of the associated
measurement (for example, RPM for
speed, RPM/min for acceleration).
Note: This parameter is not applicable
for Locked Rotor alarms.
Alert Period The period of time from startup to when the Locked
Rotor Alert Threshold is enforced. The Locked
Rotor Alert alarm is activated if the measured speed
fails to exceed the Alert Threshold value within
this specified time.
Note: The Alert Period value must be less than or
equal to the Danger Period value.
Enter a value from 1 to 255 seconds.
Note: This parameter is only
applicable for Locked Rotor alarms.
Danger Period The period of time from startup to when the Locked
Rotor Danger Threshold is enforced. The Locked
Rotor Danger alarm is activated when the measured
speed fails to exceed the Danger Threshold within
this specified time. Enter a value from 1 to 255 seconds.
Note: This parameter is only
applicable for Locked Rotor alarms.
Alarm Parameters
Parameter Name Description Values/Comments