Rockwell Automation 1440-SDM02-01RA XM-124 Standard Dynamic Measurement Module - Manuel (Page 108)

108 Rockwell Automation Publication 1440-UM001C-EN-P - May 2014
Chapter 4 Trends
SU/CD 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-124 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
Latch Enable Determines whether the triggered trend is latched or unlatched.
Latched means that subsequent triggers are ignored after the initial
trigger. This prevents the trend data from being overwritten with new
data until the trigger is manually reset (click Reset Trigger).
Unlatched means that the trend data is overwritten with new data
every time a trigger occurs. Check means latched
Clear means unlatched
Relay Number Sets the relay that triggers the trend to be collected. None means that the trend can only be triggered
manually or by a trigger event (for example, XM-
440).
Relay Number 1 is the on-board relay. Numbers 2
through 5 are either relays on the Expansion Relay
module when it’s connected to the module or
virtual relays.
Important: The relay must be enabled. Refer
to Relay Parameters on page 82.
Record Interval The amount of time between consecutive trend records.
Important: If you enter a Record Interval, the Trend Span is
automatically updated. 1 to 3600 seconds
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 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 22 - Triggered Trend Parameters
Parameter Name Description Values/Comments