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<title>JMRI: Signal Group Table Help</title>
<meta name="author" content="Bob Jacobsen, Egbert Broerse">
<meta name="Date.Modified" content="20181104">
<meta name="keywords" content="model railroad JMRI decoderpro panelpro signal">
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<h1>The Signal Group Table</h1>
<p>The Signal Group Table displays a list of your Signal Groups.</p>
<a href="images/SignalGroupTable.png"><img src="images/SignalGroupTable.png" alt=
"Tools &gt; Signal Group Table" class="floatRight" width="386" height="168"></a>
<p>There are six columns in the Signal Group Table:</p>
<ol>
<li>Each line starts with the System Name and User Name of each Signal Group</li>
<li>You may add a <strong>Comment</strong> by double clicking on that field</li>
<li>The following column contains a <strong>Delete</strong> button for that Signal
Group</li>
<li>By unchecking the <strong>Enabled</strong> check box you can temporarily disable a
particular Signal Group</li>
<li>Finally there is an <strong>Edit</strong> button</li>
</ol>
<h3 id="add">Creating a Signal Group</h3>
<p>To define a new Signal Group, click on the <a href="SignalGroupAddEdit.shtml">Add...</a>
button at the bottom of the Signal Group Table. This will prompt you for a Signal Group name
and whatever further information is needed.</p>
<p>You can delete a Signal Group from the Signal Group Table by clicking one of the
<strong>Delete</strong> buttons. Save a copy of your JMRI Configuration file as a backup
first!</p>
<h3 id="edit">Editing an existing Signal Group</h3>
<p>Click on one of the <strong>Edit</strong> buttons at the right of the Signal Group Table
to open the <a href="SignalGroupAddEdit.shtml">Edit Signal Group</a> window for the
corresponding Signal Group. <a href="images/SignalGroup.png"><img src=
"images/SignalGroup.png" alt="Signal Goup Edit pane" class="floatRight" height="225" width=
"257"></a></p>
<h2 id="example">Signal Group Example - Junction Indicator</h2>
<p>Consider the following track diagram, with 6 possible junctions off the main running
line.<br>
<a href="images/SignalGroupTrackDiagram.png"><img src="images/SignalGroupTrackDiagram.png"
alt="Signal Group application example track plan" height="90" width="233"></a></p>
<p>The Signal facing this junction will have a Junction Indicator attached, with each
possible route through the junction having it own Indication. When the Route is set for
straight through, then no indicator is shown (pictured above).</p>
<p>If the route is set for position 1, then the position 1 indicator will be shown (pictured
below).<br>
<a href="images/SignalGroupTrackDiagram1.png"><img src="images/SignalGroupTrackDiagram1.png"
alt="Position indicator on signal" height="90" width="262"></a></p>
<p>With this configuration, you would create a single Turnout Signal Head for each position,
configured with both a Dark and Lunar Appearance. You can use any two combinations of colors
you like, however Dark and Lunar are more suitable for this situation.</p>
<p>Within the Signal Group, you would then select each of the Signal Heads that are used to
create the junction indicator. The logic for each Signal Head is then configured as
follows:</p>
<table>
<tr>
<td>
<p>Position 1 - Set Turnouts</p>
<p>IT1 set Thrown</p>
<p>IT2 set Thrown</p>
</td>
<td>
<p>Position 2 - Set Turnouts</p>
<p>IT1 set Thrown</p>
<p>IT2 set Closed</p>
<p>IT3 set Thrown</p>
</td>
</tr>
<tr>
<td>
<p>Position 3 - Set Turnouts</p>
<p>IT1 set Thrown</p>
<p>IT2 set Closed</p>
<p>IT3 set Closed</p>
</td>
<td>
<p>Position 4 - Set Turnouts</p>
<p>IT1 set Closed</p>
<p>IT4 set Thrown</p>
<p>IT5 set Thrown</p>
</td>
</tr>
<tr>
<td>
<p>Position 5 - Set Turnouts</p>
<p>IT1 set Closed</p>
<p>IT4 set Thrown</p>
<p>IT5 set Closed</p>
<p>IT6 set Thrown</p>
</td>
<td>
<p>Position 6 - Set Turnouts</p>
<p>IT1 set Closed</p>
<p>IT4 set Thrown</p>
<p>IT5 set Closed</p>
<p>IT6 set Closed</p>
</td>
</tr>
</table>
<p>Back to the <a href="../../../../html/tools/signaling/SignalGroups.shtml">Signal Groups
help page</a>.</p>
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