Serge NOEL
192 lines
7.4 KiB
Plaintext
192 lines
7.4 KiB
Plaintext
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<title>JMRI Applications - Error Messages and Codes</title>
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<h1>JMRI Applications: Error Messages and Codes</h1>
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<!-- THIS FILE SHOULD BE CONSIDERED THE MASTER COPY OF ERROR MESSAGE HELP: One almost-copy remains in help/en/manual/DecoderPro3/Error.shtml @jerryg2003 2021/01/05 -->
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<p>Various things can go wrong when JMRI tries to work with your DCC command station to
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program a DCC decoder. This page lists the error message that can result, and describes what
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they mean.</p>
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<h2>JMRI Error Codes</h2>
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<dl>
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<dt><strong>301 - no locomotive detected</strong>
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</dt>
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<dd>The command station has reported that it doesn't see a locomotive on the programming
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track.</dd>
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<dd>
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<p>This can happen if the locomotive isn't making good electrical contact or if there's a
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wiring fault in the locomotive.</p>
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</dd>
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<dt><strong>302 - programmer busy</strong>
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</dt>
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<dd>
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<p>The command station has reported that it's busy doing something else, and can't do any
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programming right now. This usually means that some other part of the DCC system is doing
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a programming operation, e.g. a hand-held throttle.</p>
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</dd>
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<dd>
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<p>Some DCC systems can't do ops-mode programming (programming on the main) while also
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using the service mode programming track, in which case they'll return this error
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message.</p>
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</dd>
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<dt><strong>303 - requested not implemented in command station</strong>
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</dt>
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<dd>
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<p>This means that JMRI has requested the command station do something that it doesn't
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support.</p>
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</dd>
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<dd>
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<p>This is not supposed to happen, as JMRI should disable programming modes that the
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command station can't provide. If you do see this message, please report the
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circumstances on the <a href="https://groups.io/g/jmriusers">JMRI users Group</a>.</p>
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</dd>
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<dt><strong>304 - aborted by user</strong>
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</dt>
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<dd>
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<p>The user has requested that the read or write operation stop early.</p>
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</dd>
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<dd>
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<p>This is considered an error, because the program doesn't know whether the decoder
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actually saw the operation complete or not.</p>
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</dd>
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<dt><strong>305 - confirm failed</strong>
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</dt>
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<dd>
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<p>Some command stations allow you to "confirm" the content of a CV, rather that read the
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value from it. In general, this is faster than doing a complete read. If the value in the
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CV doesn't match the expected value, this message is issued. It's considered an error
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because if the values don't match, we know that we don't know the correct value for the
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CV contents.</p>
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</dd>
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<dt><strong>306 - timeout talking to command station</strong>
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</dt>
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<dd>
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<p>The program did not hear back from the command station when it expected to.</p>
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</dd>
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<dd>
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<p>This is by far the most common error message when people first start using JMRI. In
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that case, it usually means that the connection to the command station isn't correct.
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This could be a problem with the cable(s) making the connection, or a problem with how
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the preferences are set. Picking the wrong serial port is particularly common.</p>
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<p>Once JMRI is working properly, this error may occasionally happen due to a transient
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error. DecoderPro generally will retry it successfully in that case.</p>
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</dd>
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<dt><strong>307 - Unknown error</strong>
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</dt>
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<dd>
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<p>An error has happened, but JMRI doesn't know enough about it to be able to report more
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detail.</p>
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</dd>
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<dd>
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<p>In general, JMRI is pretty good at deciphering what went wrong, and this message isn't
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very common. If you do see this message, please report the circumstances on the <a href=
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"https://groups.io/g/jmriusers">JMRI users Group</a>.</p>
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</dd>
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<dt><strong>308 - No acknowledge from locomotive</strong>
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</dt>
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<dd>
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<p>At the end of a CV read or write operation, the locomotive replies ("acknowledges") to
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the command station using a pulse of current.</p>
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</dd>
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<dd>
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<p>If that pulse isn't seen, some command stations provide this error message. It could
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be due to poor electrical connections to the programming track or within the locomotive.
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It could also be that the decoder doesn't support readback.</p>
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<p>Some decoders, particularly certain sound decoders, draw so much current that the
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reply pulse isn't detected by the command station. In that case, one of the various
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"programming boosters" may solve the problem.</p>
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</dd>
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<dt><strong>309 - Short Circuit on Programming Track</strong>
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</dt>
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<dd>
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<p>The command station has reported seeing a short circuit on the programming track. That
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prevents programming operations.</p>
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<p>Check the electrical connections to the programming track, and also within the
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locomotive.</p>
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</dd>
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<dt><strong>310 - Sequence Error</strong>
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</dt>
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<dd>
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<p>For some reason, the programming operation ended early and the command station
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returned to normal mode (left service mode) before it should have.</p>
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<p>This error can occur when some operations are performed in JMRI during programming.
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Turning track power on during a programming operation on an XpressNet is one example of
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how to create this error.</p>
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<p>If you haven't performed any operations during your programming sequence, this error,
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might indicate that you've selected the wrong command station type in JMRI Preferences.
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Check that. If that's set correctly and error 310 still shows up, ask for help on the JMRI users
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list.</p>
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</dd>
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<dt><strong>311 - Communication Error Between PC and Command Station</strong>
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</dt>
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<dd>
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<p>The data between the PC and the Command Station was corrupted and the corruption was
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detected before the Command Station processed the request.</p>
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<p>If this error occurs frequently, this error might indicate a problem with the
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connection between your computer and the command station or an issue with your system
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interface. Wireless connections are more prone to this issue than connections with
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physically connected cables.</p>
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</dd>
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</dl>
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