Allen-Bradley 1440-SDM02-01RA, User Manual, Page: 91 / 168

Rockwell Automation Publication 1440-UM001D-EN-P - September 2016 91
Configure the XM-124 Standard Dynamic Measurement Module Chapter 2
SU/CD Trend Parameters
The XM-124 module can collect start-up or coast-down trend data when the
machine speed passes into a defined speed range. A tachometer input is
required to collect the start-up/coast-down trend.
The XM module collects a start-up trend when the machine speed rises
through the Minimum Speed 8 rpm, and stops when the machine speed crosses
either the Minimum Speed or the Maximum Speed. The module collects data
only when machine speed is increasing. It does not collect data if the machine
speed is constant or decreasing.
The XM module collects a coast-down trend when the machine speed falls
through the Maximum Speed - 8 rpm, and stops when the machine speed
crosses either the Minimum Speed or the Maximum Speed. The module
collects data when the machine speed is decreasing or increasing during a coast-
down trend (for example, a coast-down restart).
The XM module can only store one start-up/coast-down trend. Unless the
start-up/coast-down trend is latched, the trend data is overwritten with new
data when the next trigger occurs.
Trend Span The total amount of time that can be covered by the trend data (Number
of Records x Record Interval).
IMPORTANT: If you edit the Trend Span, the Record Interval is
automatically updated.
Seconds
Post Trigger The percentage of records to be collected once the trigger occurs. For
example, if you set Post Trigger to 20%, then 80% of the records in the
trend are before the trigger occurs, and 20% of the records in the trend
are after the trigger occurs.
This trigger lets you evaluate what happened after the trigger occurred.
0…100%
Status Shows the status of the trend data. Possible status values:
• Not collected - No trend data is collected.
• Collecting - A trigger has occurred and data
(including post-trigger data) is being collected.
• Collected - A trend has been saved to the buffer
and is available to view and upload.
Store Spectrum Stores the current spectrum data for both Channel 1 and Channel 2
when the trigger occurs.
Store Waveform Stores the current waveform data for both Channel 1 and Channel 2
when the trigger occurs.
View Trend Data Displays a plot of the collected trend data.
Reset Trigger Resets the trigger if Latch enabled is selected. This reset enables the
module to overwrite the previous trend data when the next trigger
occurs.
Manual Trigger Triggers the module to collect the trend data without relay activation.
View Collected Data Displays a plot of the collected spectrum or waveform data.
Table 18 - Triggered Trend Parameters (Continued)
Parameter Name Description Values/Comments