Alarm parameters – Rockwell Automation 1440-VLF02-01RA XM-121 Absolute Shaft Module User Manual
Page 63
Publication GMSI10-UM014D-EN-P - May 2010
Configuration Parameters 55
Alarm Parameters
The Alarm parameters control the operation of the alarms (alert and danger
level) and provide alarm status. The Absolute Shaft module provides nine
alarms. Each alarm is permanently associated with a corresponding
measurement (for example, Channel 1 Shaft Relative Overall alarm, Channel 2
Case Absolute Overall alarm, and so on). Use the parameters to configure
which measurement the alarm is associated with, as well as the behavior of the
alarm.
Trigger Hysteresis
The amount of hysteresis around the trigger
threshold. In Auto Trigger mode, the value entered is
a percentage of the peak-to-peak input signal. This
value can range from 0 to 50%.
In Manual Trigger mode, the value entered is a
voltage level. The hysteresis voltage is added to or
subtracted from the threshold voltage to determine
the hysteresis range. The minimum value is 0.12
volts.
% in Auto Trigger mode
Volt in Manual Trigger mode
Trigger Threshold
The signal level to be used as the trigger value when
in Manual Trigger mode.
Enter a value from +16 to -16 volts dc.
Note: This value is not used in Auto
Trigger mode.
Trigger Slope
The input signal slope to be used as the trigger value
when in Manual Trigger mode.
Options: Positive
Negative
Note: This value is not used in Auto
Trigger mode.
Tachometer Signal Processing Parameters
Parameter Name
Description
Values/Comments
Alarm Parameters
Parameter Name
Description
Values/Comments
Alarm (XM Serial Configuration
Utility only)
Sets the alarm to be configured in the XM Serial
Configuration Utility. Each alarm is associated with a
particular measurement.
Options: Ch. 1 SR (shaft relative)
Overall
Ch. 2 CA (case absolute)
Overall
Ch. 1 SR 1X Mag
Ch. 2 CA 1X Mag
Shaft Absolute Overall
Shaft Absolute 1X Mag
Ch. 1 DC Bias
Ch. 2 DC Bias
Speed
Name (XM Serial Configuration
Utility only)
A descriptive name to identify the alarm in the XM
Serial Configuration Utility.
Maximum 18 characters