Serge NOEL
128 lines
4.9 KiB
Plaintext
128 lines
4.9 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: Warrants Help</title>
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<meta name="author" content="Karl Johan Lisby">
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<meta name="keywords" content="JMRI Fast Reacting Warrant Help">
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<h1>Fast Reacting Warrants</h1>
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<p>This type of Warrant does not follow the <a href="Warrant.shtml">standard Prototypical
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Warrant</a> rules, but instead reacts to signals with an immediate speed change upon entering
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their approach block.<br>
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The throttle settings are a fixed proportion of the Aspect Speed Names in Warrant
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Preferences. It is specially adapted for small layouts with short blocks.<br>
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Apart from standard and Fast Reacting Warrants, a third type is eNtry-eXit or <a href=
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"NXWarrant.shtml">NX Warrants</a></p>
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<p>A number of nice features in standard Warrants have been sacrificed in Fast Reacting
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Warrants for the sake of speedy and reliable control of small layouts. This includes
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disabling of speed ramping and the ability to control bells, whistles and light when the
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train enters a block.</p>
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<p>Likewise a few features available in Fast Reacting Warrants that are not present in
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standard Warrants.</p>
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<p>First and foremost Fast Reacting Warrants are controlled by signals (hence their technical
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name Signal Controlled (SC) Warrants). This obviously requires that you have defined signals
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- at least virtual signals - on your layout and that you have added those signals to your
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OPortals. If you have done that, the Fast Reacting Warrant will constantly "look" at the next
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signal along its route and adapt the speed of the train to the Aspect shown by that signal.
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This speed adaptation happens promptly and no matter how often the Aspect changes. Thereby
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the train will stop even within short blocks.</p>
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<p>Note: If you have slow moving turnouts on your layout, you have to protect each turnout
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with a signal. Otherwise a train might run through the turnout while it moves.</p>
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<p>An additional feature of Fast Reacting Warrants is that it is possible to define a number
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of milliseconds that the train shall continue with low speed after it has entered the
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destination block. This is in part a substitute for the very flexible way standard Warrants
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are able to execute throttle commands. But it is also a quite reliable way to make the train
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stop at the same location every time.</p>
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<p>One more requirement to your layout: Fast Reacting Warrants do not handle "dark" Blocks.
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I.e. all those Blocks you use in the route for a Fast Reacting Warrant must be equipped with
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an occupancy sensor. I.e. the Warrant must at all times have at least one sensor active (and
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thereby an OBlock occupied) while the Fast Reacting Warrant is running a train.</p>
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<h2>Comparison between Warrant types</h2>
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<table style="width:100%">
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<tr>
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<td><strong>Feature</strong>
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</td>
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<td><strong>Standard</strong>
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</td>
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<td><strong>Fast Reacting (SC)</strong>
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</td>
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<td><strong>Entry Exit (NX)</strong>
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</td>
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</tr>
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<tr>
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<td>Ramps speed up and down</td>
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<td>yes</td>
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<td>no</td>
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<td>yes</td>
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</tr>
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<tr>
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<td>Executes throttle commands as recorded</td>
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<td>yes</td>
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<td>no</td>
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<td>no</td>
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</tr>
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<tr>
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<td>Can be stored / is permanent</td>
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<td>yes</td>
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<td>yes</td>
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<td>no</td>
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</tr>
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<tr>
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<td>Can be converted to another type</td>
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<td>to SC</td>
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<td>to standard</td>
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<td>to standard or SC</td>
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</tr>
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<tr>
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<td>Recording of throttle commands</td>
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<td>yes</td>
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<td>no</td>
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<td>no</td>
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</tr>
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<tr>
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<td>Calculation of throttle commands</td>
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<td>no</td>
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<td>yes - while running</td>
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<td>yes - during creation</td>
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</tr>
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</table>
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<h2>Creating and running a Fast Reacting Warrant</h2>
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<p>A Fast Reacting Warrant is created and used in the same way as standard Prototypical
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Warrants. You may even switch back and forth between a Fast Reacting Warrant and a standard
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Warrant.</p>
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<p>Simply change the Warrant type in the <a href="CreateEditWarrant.shtml">Warrant
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Editor</a>.</p>
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