Rockwell Automation 1440-SDM02-01RA XM-124 Standard Dynamic Measurement Module - Manuel (Page 87)

Rockwell Automation Publication 1440-UM001C-EN-P - May 2014 87
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.
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 lets you to 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 currently
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 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 10 - Triggered Trend Parameters
Parameter Name Description Values/Comments