Emerson PACSystems Versamax, Руководство пользователя

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User Manual Chapter 4
GFK-2721B Sep 2019
Diagnostics 38
4.2.1 Fatal Error Handling
Any failures that occur during powerup or firmware update mode are considered fatal
errors. This includes faults detected on non-critical devices such as the USB port. After
successful powerup of the PROFINET Scanner, only catastrophic errors are treated as fatal.
If a fatal error occurs, the PROFINET scanner either blinks an error code on its LEDs or restarts
automatically, depending on its configured Fatal Error Action. If the module has not been
configured, it blinks an error code (the default setting). For example, a blink code of 4-5 is a
Watchdog error. This may be expected during heavy network traffic.
When the PROFINET Scanner detects a catastrophic failure, it tries to save diagnostic
information to non-volatile storage. This information overwrites any previous diagnostic
information in storage. Only information about the most recent fatal error is retained. This
information is available on future power cycles to be retrieved and sent to Emerson for
analysis.
While diagnostic information is being saved, the PROFINET Scanner blinks its OK LED amber.
The PROFINET Scanner disables Ethernet and USB communications, so communication with
the module is not possible. If the PROFINET Scanner cannot save the diagnostic information,
it is considered a failed Save attempt.
After the attempt to store the information has completed (whether it succeeded or failed),
the module either blinks an error code or restarts, depending on how it is configured.
Automatic Restart
If the PROFINET Scanner is configured to automatically restart after a fatal error, on the next
successful power-up, a diagnosis alarm is generated to indicate the PROFINET Scanner reset.
This diagnosis alarm turns the Fault LED on and persists until the PROFINET Scanner is
power-cycled. There is no way to clear this fault other than a second successful restart.
This might be a preferable setting under certain conditions. For example, if you are
experiencing repeated 4-5 Watchdog errors, you could use this setting to automatically
recover.
A persistent fatal error that occurs after the PROFINET Scanner has successfully powered-up
can cause the module to continually reset itself.
4.2.2 PROFINET Alarms
The PROFINET Scanner reports its own non-fatal errors and errors on modules in the remote
node using PROFINET Diagnosis or PROFINET Pull/Plug alarms.
PROFINET Diagnosis Alarms
Diagnosis Alarms indicate any fault conditions other than a module add, loss, or mismatch
that a VersaMax PROFINET Scanner needs to communicate to the PROFINET Controller.
Most faults generate Diagnosis alarms. Situations that do not send a PROFINET Diagnosis
are covered in a later section.