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72 lines
3.2 KiB
Plaintext
72 lines
3.2 KiB
Plaintext
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<meta name="generator" content="HTML Tidy for HTML5 for Apple macOS version 5.8.0">
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<title>JMRI: Fast Clock - LocoNet Capability</title>
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<meta name="author" content="Bob Jacobsen">
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<meta name="keywords" content="JMRI help Setup LocoNet Fast Clock">
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<h1>JMRI Fast Clocks - LocoNet Capability</h1>
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<p>A Digitrax LocoNet can contain it's own fast clock, driven by the DCS100, DCS200, or DCS50
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command stations. A separate LocoNet fast clock is available from Logic Rail Technologies.
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JMRI can work with any of these, or with any clock that uses the standard Digitrax method to
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control fast clocks.</p>
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<p>This page discusses how JMRI can either use or control the LocoNet fast clock.</p>
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<h2>Controlling the LocoNet clock</h2>
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<p>The "Clock Monitor" tool in the "LocoNet" menu provides a convenient way to:</p>
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<ul>
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<li>Read the current contents of the LocoNet fast clock</li>
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<li>Set the date and time</li>
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<li>Set the rate. Note that you can't explicitly pause a LocoNet clock, but you can stop it
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by setting the rate to zero.</li>
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</ul>
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<p>If you are using a DCS100 or DCS200 command station to create your LocoNet fast clock, you
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may have noticed that it doesn't keep particularly good time. If you select the "Correct
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LocoNet Fast Clock Master", JMRI will adjust the rate of the LocoNet clock so that it keeps
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better time.</p>
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<h2>Using the LocoNet clock</h2>
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<p>The recommended settings for running with LocoNet Fast Clock is: set <strong>Time
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Source</strong> to <strong>Internal Computer Clock</strong>, and check both the
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<strong>Synchronize...</strong> and <strong>Correct...</strong> options. However you can try
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other settings. If you use the internal computer clock as the time source, you will not be
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able to change the fast clock rate or the fast clock time from a throttle.</p>
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<p>You can also have JMRI use the LocoNet clock for it's own, internal timebase. This keeps
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the clocks that JMRI displays on the screen synchronized with the LocoNet clock, hence the
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displays on DT400 throttles, etc.</p>
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<p>To do this, select the "LocoNet Fast Clock sets Internal Clock" option on the LocoNet
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clock monitor window. Note that you should do this <em>before</em> opening the clock windows
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so that when you open the clock windows they connect to the correct timebase.</p>
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<p>If you use a Logic Rail Technologies fast clock, it should be set up as a slave clock, not
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as a master. You may notice that the Logic Rail Technologies fast clock lags behind by one
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fast clock minute. Be assured that the correct commands are being sent by JMRI. This lag, if
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present, is just an artifact of the Logic Rail clock's internal programming.</p>
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