Rockwell Automation 1440-SDM02-01RA XM-124 Standard Dynamic Measurement Module - Manuel (Page 109)

Rockwell Automation Publication 1440-UM001C-EN-P - May 2014 109
Trends Chapter 4
collects data only when machine speed is increasing. It does not collect data if the
machine speed is constant or decreasing.
The XM-124 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-124 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.
The SU/CD trend parameters define the trend data that is collected by the
module during the start-up or coast-down of a machine. Use these parameters to
configure the measurements included in the start-up and coast-down trend
records, the interval between trend records, and the minimum and maximum
speed limits at which record collection starts and stops.
IMPORTANT The SU/CD Trend parameters are not included in the EDS file and cannot be
edited using generic configuration tools such as RSNetWorx for DeviceNet
software.
Table 23 - SU/CD Trend Parameters
Parameter Name Description Values/Comments
Enable SU/CD Trend Enables/disables the SU/CD trend measurements. Select to configure
the SU/CD trend measurements. Check to enable.
Clear to disable.
Select Measurements Sets the measurements to be collected and stored in the module.
Important: The Speed measurement is always included in the start-
up/coast-down trend. 1…16 measurements can be selected.
Number of Records The maximum number of measurement sets that can be collected in
the trend buffer. The measurement sets make up the trend data. The Number of Records is automatically calculated
based upon the number of Trended
Measurements selected.
Latch Enable Determines whether the start-up/coast-down trend is latched or
unlatched.
Latched means that subsequent start-up/coast-down trends are
ignored after the initial start-up/coast-down. This prevents the trend
data from being overwritten with new data until the trigger is
manually reset (click Reset Trigger).
Unlatched means that the start-up/coast-down trend data is
overwritten with new data every time the machine speed crosses into
the speed range. Check means latched
Clear means unlatched
Record Interval The change in speed between consecutive records.
Important: If you enter a Record Interval, the Maximum Trend
Span is automatically updated. 1…3600 rpm
Maximum Trend Span The maximum change in speed 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. rpm