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<title>JMRI: System Console</title>
<meta name="author" content="Egbert Broerse">
<meta name="keywords" content="JMRI help System Console logging debug">
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<h1>JMRI: System Console</h1>
<p>The JMRI System Console panel is where you get system output from JMRI.</p>
<!-- Copied from NCE help -->
<h2>Using the System Console</h2>
<p>JMRI provides connection information via the system console. You can find the system
console under the main menu header "Help" then "System Console...". Below is an image of the
console window when the program is operating normally. Note that the window size has been
adjusted so we can read it a bit more easily.</p>
<p><img src="../../html/hardware/images/jmriConsoleOk.jpg" alt="JMRI Console">
</p>
<p>If you're having problems, the console window can look like the one below:</p>
<p><img src="../../html/hardware/images/jmriConsoleFail.jpg" alt="JMRI Console">
</p>
<p>To help you better understand what might be happening and to possibly resolve your problem
we'll explain some of the warning and error messages displayed in the above console
window.</p>
<p>The very first messages are information message labeled "INFO". The first message occurs
at time "0" which can be found at the left side of the message. The next "INFO" message
states where this log file is stored. The next info provides the version of JMRI and JAVA
that you are using. And the last info message provides the communication port that you've
selected in preferences, along with the baud rate or the speed of your connection.</p>
<p>The first warning message states that there was a timeout to message "AA". During startup,
JMRI checks to see if your Preferences match those in the NCE command station. Message "AA"
requests the EPROM revision of the command station. The response is normally three
characters, something like "6.2.1". A timeout means that JMRI asked for something and the
command station didn't respond. When the connection is correct and the system is powered up,
you should not see any timeout messages.</p>
<p>The next warning message states that because there was a timeout, the program didn't get
the information requested from the command station. The next messages continue as the program
tries every 10 seconds to read the EPROM revision by issuing the "AA" command. You can try
and trouble shoot your connections knowing that every 10 seconds JMRI will retest to see if
you've fixed the problem.</p>
<p>Whenever JMRI detects a problem with the connection or NCE command station, it will
request the EPROM revision to see if the connection and command station is still operational.
So if you see timeouts and "AA" commands you have either poor or failed connection, or a
powered down or failed command station.</p>
<p>See <a href="../../html/doc/Technical/Logging.shtml">JMRI Logging</a> for details of how to change the logging levels.</p>
<p>This is the apps.SystemConsole.shtml help page.</p>
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