Serge NOEL
124 lines
5.9 KiB
Plaintext
124 lines
5.9 KiB
Plaintext
<!DOCTYPE html>
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<title>JMRI: Basic Enhanced Signaling Definition</title>
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<h1>JMRI: Basic Enhanced Signaling Definition</h1>
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This directory contains basic signaling definitions understood by many model railroaders.
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They don't model any specific prototype, but are similar to transition era ARR signaling
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techniques. This "basic-enhanced" definition is based on the "basic" definition and brings
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the following enhancements:
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<ol>
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<li>Addition of "Advanced Approach" aspect.</li>
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<li>Addition of a 3-head mast.</li>
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<li>All mast image files collected together under the "basic-enhanced" directory.</li>
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<li>Mast image files renamed to indicated displayed light color rather than a rule number
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<ul>
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<li>In the case of multi-head masts, colors are arranged top to bottom in filename.</li>
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<li>The light colors are represented as:
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<ul>
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<li>R = Red</li>
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<li>Y = Yellow</li>
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<li>FY = Flashing Yellow (with suffix to indicate animated or static gif)</li>
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<li>G = Green</li>
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</ul>
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</li>
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<li> Example: "SL-2-high-G-R.gif" for a Searchlight two head high mast in Green over
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Red appearance.
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</li>
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</ul>
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</li>
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</ol>
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<p>See the <a href="aspects.xml">aspect page</a>.</p>
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<p><u><b>USAGE INFORMATION:</b></u> When using the basic-enhanced signal system with Signal
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Mast Logic (SML) set the Global Thrown speed to Limited. On Panel Pro window, navigate to
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Tools>Tables>Turnouts page, select Speeds>Defaults... and selecting "Limited" from the
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Thrown Speed pulldown. By default, JMRI sets at the Global Thrown speed to "Restricted"
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and the Global Closed speed to "Normal."
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</p>
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<p><u><b>USING SPEED TO SELECT SECONDARY DIVERGING ASPECTS:</b></u> When using the three-head
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mast contained in this basic-enhanced signal system with SML, set the speed of the diverging
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route to be signaled by the bottom head to "Medium". This is easily accomplished by creating
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a dummy block whose speed is set to "Medium" and including it in that route's logic with a
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test setting of "Any State". The dummy block is not part of the actual layout and does not
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need to be placed on the layout panel.
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</p>
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<p>In JMRI, a route is either Normal or Diverging. If a route contains even one turnout in
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Thrown state, then that entire route is Diverging. If a route contains two turnouts or two
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crossovers, that means there are two diverging paths. SML uses a route's speed to
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determine which head on a mast is used to signal the second diverging path. In the case
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of the three head mast contained in the basic-enhanced signal system, the bottom head has
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its speed set to Medium (slower than Limited) and is intended to signal this two-turnout
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case. It can be used to indicate the route will take the second of two successive, closely
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spaced turnouts, or that the route passes through both closely spaced crossovers, as in the
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case of a three-track crossover move. Usage of the dummy block set to Medium speed as
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discussed above is an easy method to inform SML to use the bottom head to signal this
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secondary route.
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</p>
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<p><u><b>DISCUSSION ON ROUTE SPEED:</b></u> The speed of a given route between two Signal
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Masts is equal to the slowest speed assigned to any element in the route. When a block is
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created, JMRI assigns the Global Normal speed to it. By default this is "Normal" speed.
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When a turnout is created, JMRI assigns the Global Normal speed to its Closed path and the
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Global Thrown speed to its Thrown path. These by default are "Normal" and "Restricting",
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respectively. The usage recommendation for the basic-enhanced signal system is the set the
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Global Thrown speed to "Limited." See above for instructions. If a route between two masts
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contains blocks and turnouts that are all Closed, then the speed of that route is the Global
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Normal speed. If a route contains a turnout in the Thrown state, the speed of that route is
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the Global Thrown speed. A route's speed can be modified individually by overriding the
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defaults. JMRI provides several options for doing this. For example, the speeds for
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an element in the route, such as a turnout's path or a block, can be individually set,
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or a virtual element can be created and included in that route to set the route's speed.
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Remember that the slowest speed of any element in the route sets the speed of the entire
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route. The speed names (Restricted, Medium, etc) and their relative magnitude are found
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in file xml/signals/signalSpeeds.xml located under the JMRI install directory.
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</p>
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<p>Signal Mast definitions:</p>
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<ul>
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<li>
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<a href="appearance-one-searchlight-high.xml">Single searchlight high signal</a>
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</li>
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<li>
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<a href="appearance-two-searchlight-high.xml">Double searchlight high signal</a>
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</li>
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<li>
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<a href="appearance-three-searchlight-high.xml">Triple Searchlight high signal</a>
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</li>
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<li>
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<a href="appearance-one-searchlight-low.xml">Single searchlight low signal</a>
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</li>
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<li>
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<a href="appearance-two-searchlight-low.xml">Double searchlight low signal</a>
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</li>
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</ul>
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