Save Measurements To An Existing Log File - Emerson AMS Trex User Manual

Fieldbus Diagnostics application
5.13.3

Save measurements to an existing log file

You can save measurements to an existing file on the Trex unit to create a trend/report of
the fieldbus segment.
Note
The Fieldbus Diagnostics application does not let you browse to an existing log file saved on the Trex
unit. You need to enter the file name.
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Option
Save Option
Target Update Rate
Max Log Entries
The Fieldbus Diagnostics application begins saving the measurements.
Description
Select Append to save the measurements to an existing
log file of the same filename, or select Replace to
overwrite the data in an existing log file with the same
filename. Append is the default option. The log file is
limited to 176 MB. If the file exceeds 176 MB, the
application can no longer append additional log files/
measurements to the existing file.
The number of seconds in between each set of
measurements. The default setting is to take a set of
measurements every 10 seconds.
If the Fieldbus Diagnostics application detects a device
was added/removed from the device list or it detects a
bad DC voltage, the application captures an extra DC
voltage measurement in the log file to show the DC
voltage dropping.
Note
The actual update rate may be affected by conditions
on the fieldbus network. For example, if the fieldbus
network has a lot of scheduled activity, the rotation of
the network token will be slow, and the Trex unit will to
wait longer to measure each device's signal.
The maximum number of measurement sets collected
in one session and saved to the log file. A DC voltage, a
noise, and signal measurement are one measurement
set. These entries appear as a row in the .csv log file.
Note
If the maximum number of entries is reached, the
Fieldbus Diagnostics application stops saving data to
the log file. You can continue to append log entries to
an existing log file, until the log file reaches the
maximum file size.
User Guide