Linear Technology DC2028A Manual page 12

ADvAnceD Demo BoArD operAtions
WHAT IS A FAULT LOG?
A fault log is a non-volatile record of the power system leading up to the time of fault. It holds the most recent moni-
tored values (uptime, voltage, current, temperature) that can be analyzed to help determine the cause of the fault. It
is a powerful diagnostic feature of the LTC2977 on the DC2028A demo board.
CREATE A FAULT LOG
To create a fault log, you must create a fault, as described in the
Creating A Fault section on page 7. If multiple boards are configured,
select the appropriate device in the system tree by clicking on the
appropriate LTC2977 chip. We will proceed to work with the fault log.
WORKING WITH THE FAULT LOG
Once a fault has occurred, the Fault Log (FL) icon will show a red (+) sign on it, indicating that the GUI
has detected a fault log in the device. Clicking the icon will bring up a dialog box. Note that it is context
sensitive. If multiple DC2028A boards are connected, be sure that the desired device is selected in the
system tree.
Notice that the checkbox Log to EEPROM on Fault is checked.
Once a fault occurs, the device will automatically write the fault
log data to EEPROM (NVM). At this point, the log is locked and
will not change until it is cleared by the user. To read the EEPROM
log data, first click the NVM to RAM button. At this point the RAM
Log is locked and not updated even though the telemetry readings
continue. Click the Read RAM Log button. The log data will appear
in the text box below.
DEMO MANUAL DC2028A
dc2028af
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