Rockwell Automation 1440-VAD02-01RA XM-123 Aeroderivative Module - Manual (Page 77)

Publication GMSI10-UM003D-EN-P - May 2010
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Triggered Trend Parameters The XM-123 module can collect a triggered trend. A triggered trend is a
time-based trend that is collected when a relay is activated, or the module
receives a trigger event.
Once the triggered trend is configured, the XM-123 continuously monitors the
trended measurements. When a trigger occurs, the XM-123 collects additional
data as specified by the Post Trigger parameter.
The XM-123 can only store one triggered trend. Unless the triggered trend is
latched, the trend data is overwritten with new data when the next trigger
occurs.
The triggered trend parameters define the trend data that is collected by the
module. Use these parameters to select the measurements included in the
trend records, the interval between trend records, and which relay triggers
(activates) the collection of the trend data.
IMPORTANT
The 4-20 mA outputs are either on or off. When they are
on, the 4-20 mA outputs overshoot the 4 and 20 mA limits
by 10% when the measurement exceeds the minimum and
maximum range. This means the minimum current
produced is 3.6 mA and the maximum current produced is
22 mA.
When the 4-20 mA outputs are off, they produce a current
approximately 2.9 mA. The 4-20 mA outputs are off under
the following conditions:
• The 4-20 mA outputs are set to "Disable" (see Enable on
the previous page).
• The module is in Program mode.
• A transducer fault or tachometer fault occurs that affects
the corresponding measurement.
IMPORTANT
The Triggered Trend parameters are not included in the
EDS file and cannot be edited using generic configuration
tools such as RSNetWorx for DeviceNet.