Emerson AMS Trex Device Communicator User Manual page 173

User Guide
5.13.3
User Guide
1.800.561.8187
Option
Target Update Rate
Max Log Entries
The Fieldbus Diagnostics application begins saving the measurements.
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.
Procedure
1. On the Fieldbus Diagnostics Overview screen, tap Logging.
The Log Settings screen lists the current file name that is being used.
2. Check the name listed in the File Name field. If it is the desired file, tap OK.
3. If the desired file name is not listed, do the following:
a) Tap File Name on the Log Settings screen.
b) Tap File Name.
c) Enter the desired file name, and tap OK.
d) Tap OK.
www.
Fieldbus Diagnostics application
Description
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.
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September 2021
173