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130 lines
6.1 KiB
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130 lines
6.1 KiB
Plaintext
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<title>JMRI: Signal Groups Documentation</title>
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<meta name="author" content="Bob Jacobsen, Egbert Broerse">
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<meta name="keywords" content="model railroad JMRI decoderpro panelpro signal">
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<h1>JMRI: Signal Groups</h1>
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<p>Signal Groups are used to define a number of Signal Heads, where only one Signal Head can
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be illuminated at any given time, depending upon the status of the associated Signal Mast and
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a set of conditions.</p>
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<h3>Application</h3>
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<p>Signal Groups would be used where additional Indicators (displays) are used to support the
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main Signal Mast, such as:</p>
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<ul>
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<li>
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<a href="#junction">Junction Indicators</a>
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</li>
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<li>
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<a href="#route">Route Indicators</a>
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</li>
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<li>
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<a href="#speed">Speed Indicators</a>
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</li>
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</ul>
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<p>These Indicators provide additional information to the driver that is not given by the
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main Signal Mast. Such indicators are frequently seen in Continental European and UK
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signaling.</p>
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<h4 id="junction">Junction Indicators</h4>
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<img src="../../../package/jmri/jmrit/beantable/images/SignalGroup1.png" class="floatRight"
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width="30" height="90" alt="Junction Indicator figure">
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<p>A Junction Indicator can be configured to display anything from 1 to 6 diverging routes. A
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single indicator will frequently be found where a branch line diverges off from a main line.
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Multiple indicators will be found in more complex areas such as the approach to stations and
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good yards, where multiple routes can be taken. The Junction Indicator informs the driver
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that he is about to take a different route and should therefore adjust his speed according to
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the signage.<br>
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The Junction Indicators themselves will be set according to a given set of Turnouts for that
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junction.</p>
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<h4 id="route">Route Indicators</h4>
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<p>A Route Indicator as used in the UK, will display a number or letter. They are
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predominately found attached to Signals on the approach to a Station and display which
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platform the train has been routed into. Given the complexity of some station throats, there
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may be a number of different physical routes that could be take from the Signal to the
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destination. Thus a Junction Indicator could not be used when tied in with turnout positions.
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In addition the Junction Indicator can only deal with 6 different routes, and some stations
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have more than 6 platforms.<br>
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Therefore, the Route Indicator can only display one destination at time. The displaying of a
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route doesn't necessarily indicate that the driver will take the same route to get to the
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destination platform.</p>
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<h4 id="speed">Speed Indicators</h4>
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<img src=
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"../../../package/jmri/jmrit/beantable/images/speedindicbelg40.gif" class="floatRight" width=
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"60" height="119" alt="Speed Indicator figure by J. Calvert">
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<p>A Speed Indicator as used in Dutch (Prorail) and Belgian (NMBS/SNCB) railways will display
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an illuminated digit below the main Signal Head, e.g. a "4" restricts the maximum speed to 40
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km/h.</p>
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<h3 id="table">The Signal Group Table</h3>
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<a href="../../../package/jmri/jmrit/beantable/images/SignalGroupTable.png"><img src=
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"../../../package/jmri/jmrit/beantable/images/SignalGroupTable.png" class="floatRight" width=
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"386" height="168" alt="Signal Group Table figure"></a>
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<p>JMRI Signal Groups can be created and edited using the <a href=
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"../../../package/jmri/jmrit/beantable/SignalGroupTable.shtml">Signal Group Table</a>. You
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access this tool from the Tools > Tables > Signal Groups menu of most JMRI
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programs.<br>
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In the Signal Group Table you can create, change and delete individual Signal Groups. You
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change the settings of a Signal Group by clicking on the "Edit" button in the corresponding
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line.<br>
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More information on configuring Signal Groups and an <a href=
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"../../../package/jmri/jmrit/beantable/SignalGroupTable.shtml#example">Example</a> can be
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found on the <a href="../../../package/jmri/jmrit/beantable/SignalGroupTable.shtml">Signal
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Group Table help page</a>.</p>
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<h3 id="add">Creating a Signal Group</h3>
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<p>You add a new Signal Group by clicking on the "Add..." button at the bottom of the Signal
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Group Table, which takes you to the <a href=
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"../../../package/jmri/jmrit/beantable/SignalGroupAddEdit.shtml">"Add Signal Group"
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panel</a>.</p>
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<h3>Controlling a Signal Group</h3>
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<p>The information from the Signal Group Table is used by the Signal Mast Logic to calculate
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the specified behavior of a Signal Group. You can test this by manually changing one of the
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Indicator Signal Heads in the <a href=
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"../../../package/jmri/jmrit/beantable/SignalHeadTable.shtml">Signal Head Table</a>.</p>
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<h2>Saving and Reloading Configuration</h2>
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<p>The Signal Groups information is saved as part of the JMRI configuration in an XML file,
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along with control panel setup and similar stuff. See <a href=
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"../../apps/LoadStoreWork.shtml">Loading and Storing Your Work</a>.</p>
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<p>For more information on creating and displaying panels, including how to show Signals on
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your Panels, please see the <a href="../../apps/PanelPro/index.shtml">Panels help
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pages</a>.</p>
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<p>Back to the <a href="index.shtml#tools">Signaling main help page</a>.</p>
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