180 • 4-Series™ Control Systems Product Manual — Doc. 8559B
Message Logging
4-Series control systems provide messages when the control system performs a task or when it
encounters an issue, such as a hardware or software failure, hardware incompatibility with
software definitions, or a programming error.
NOTE: A MSG LED on the control system or controlled device may light to indicate that a
logged event has occurred.
Messages created by the control system are written to a persistent log that is stored in the
internal flash memory. The persistent log can be saved to external storage on supported models
and can be viewed through the console or through Crestron Toolbox.
Persistent Log
The persistent log (PLOG) is a log of messages defined by the control system. The current PLOG
can be viewed in the control system console and is available following a device restart The
control system stores the contents of the current PLOG file at \plog\CurrentBoot. The log file is
locked and cannot be opened for transfer.
To print the contents of the current PLOG in the console, issue the err plogcurrent command.
Observe the following about the PLOG:
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If a soft restart is performed, any pending messages are written to the latest log file and
zipped into one file. On restart, the zipped file at plog\CurrentBoot is moved to
\plog\PreviousBoot. During subsequent restarts, the zipped file from \plog\PreviousBoot
is moved to \plog\ZippedLogs for storage.
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The control system logs errors as long as there are not over 250 messages per two-minute
period for two consecutive two-minute logging periods:
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For each error period, the console displays a PersistentLog: Error state
threshold met message if error logging is suspended.
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When logging is suspended, the log file displays a PersistentLog: Consecutive
error states detected; logging is suspended message, and the user
receives a PersistentLog is suspended, please contact dealer message in
the console.
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Message logging resumes when there has been less than 10 error messages logged
for 10 consecutive two-minute logging periods. When logging resumes, all messages
from the 10 previous logging periods are logged to the PLOG file. The log in the
console also displays a PersistentLog: Consecutive quiet states detected;
logging is resumed message.
The PLOG can also be viewed in Crestron Toolbox using the Error Log function. For more
information, refer to the Crestron Toolbox help file.
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