Serge NOEL
165 lines
11 KiB
Plaintext
165 lines
11 KiB
Plaintext
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<meta name="generator" content="HTML Tidy for HTML5 for Apple macOS version 5.8.0">
|
|
<title>JMRI: Set Signals at Crossover Help</title>
|
|
<meta name="author" content="Dave Duchamp">
|
|
<meta name="keywords" content="JMRI help Layout Editor panel">
|
|
<!--#include virtual="/help/en/parts/Style.shtml" -->
|
|
</head>
|
|
<body>
|
|
<!--#include virtual="/help/en/parts/Header.shtml" -->
|
|
|
|
<div id="mBody">
|
|
<div id="mainContent" class="no-sidebar">
|
|
<h1>Set Signals at Crossover</h1>
|
|
|
|
<h2>Introduction</h2>
|
|
|
|
<p>This tool provides an automated procedure for assigning signals to a crossover turnout,
|
|
either a double crossover, a right-handed single crossover, or a left-handed single
|
|
crossover. If requested, this tool will place signal icons on the panel at the specified
|
|
turnout, and will set up signal logic for specified signal heads. Prior to selecting this
|
|
tool, the turnout must be on the panel, and required signal heads must be in the Signal Head
|
|
Table. This tool places signal heads only when the main track of the turnout is vertical or
|
|
horizontal (or mostly vertical or horizontal) on the panel, so design your panel accordingly.
|
|
The Simple Signal Logic created by this tool only works correctly if each of the track
|
|
segments connected to the four connection points of the crossover are assigned to different
|
|
blocks.</p>
|
|
|
|
<p>When this item is selected in the <strong>Tools</strong> menu, a small dialog is shown for
|
|
entry of the turnout name (system or user) of a crossover turnout. If this tool is entered by
|
|
selecting <strong>Set Signals...</strong> in the crossover turnout's popup menu, the turnout
|
|
name is automatically entered. After the crossover turnout name has been entered and
|
|
verified, a dialog is shown for entry of the names (system or user) of four to eight signal
|
|
heads to be assigned to the crossover turnout.</p>
|
|
|
|
<p>Crossover turnouts differ from other turnouts in several important ways. Like other
|
|
turnouts, crossovers have two states--crossed (Thrown) and straight (Closed). To change a
|
|
crossover's state, however, requires two or four track switches to change in unison. This may
|
|
be accomplished using one to four switch machines. Normally a crossover is assigned a single
|
|
turnout entry in the turnout table, but it may have several if its switch machines are
|
|
controlled by different stationary decoders. You can use two JMRI routes controlled by the
|
|
same internal turnout to make multiple switch machines work together. In this case, enter the
|
|
internal turnout as the turnout linked to the crossover turnout drawing.</p>
|
|
|
|
<p>For each signal head, check boxes are available for selecting whether an icon is to be
|
|
placed on the panel, and whether Simple Signal Logic is to be created for the signal head.
|
|
Regardless of whether icons are placed or logic is created, Layout Editor will record that
|
|
the entered signal heads are assigned to the specified crossover turnout.</p>
|
|
|
|
<p><strong>Assigning signal heads to turnouts is important to completely describe your layout
|
|
in Layout Editor.</strong> Even if you elect to place your icons and set up your signal logic
|
|
manually, you should use this tool to assign the signal heads to their crossover turnout.</p>
|
|
|
|
<h2>The Set Signals at Crossover Dialog</h2>
|
|
|
|
<p>If prompted to enter the <strong>Turnout Name</strong>, enter the name (system or user) of
|
|
the crossover turnout to which the signal heads will be assigned. If the tool cannot find the
|
|
entered turnout on the panel, an error message results. Also if the entered turnout is not a
|
|
crossover turnout, an error message results. If an internal turnout is used to control the
|
|
crossover (see above), enter its name in the <strong>Turnout Name</strong> field.</p>
|
|
|
|
<p>Signal Head names (either system or user) are entered in the large dialog. Entry of two
|
|
signals at each corner of the double crossover turnout is provided for. For left-handed
|
|
crossovers or right-handed crossovers, the tool provides for two signals at each throat
|
|
corner, and one signal at each continuing track corner. At least one
|
|
<strong>Continuing</strong> signal head must be entered at each corner, but the
|
|
<strong>Diverging</strong> entries are optional. The corner labels, A, B, C, and D are as
|
|
shown below for the double crossover case of all eight signal heads and the double crossover
|
|
turnout in the straight through (Closed) position. (In the diagram below, the double
|
|
crossover turnout has not been rotated.)</p>
|
|
|
|
<p><a href="./images/DoubleXover8.gif"><img src="./images/DoubleXover8.gif" width="207"
|
|
height="109" alt="crossover double heads"></a>
|
|
</p>
|
|
|
|
<p>Similarly, the diagram below shows the four-signal-head case with a double crossover
|
|
turnout in the crossover (Thrown) position. If you rotate the turnout, the corner labels
|
|
rotate also. Single crossovers are the same, except with one crossover track instead of
|
|
two.</p>
|
|
|
|
<p><a href="./images/DoubleXover4.gif"><img src="./images/DoubleXover4.gif" width="221"
|
|
height="113" alt="crossover single heads"></a>
|
|
</p>
|
|
|
|
<p>If signal heads at this crossover turnout have been entered previously, click <strong>Get
|
|
Saved</strong> to retrieve the signal head names previously entered.</p>
|
|
|
|
<p>Any of the corners that can have two signals, may actually have either one or two signals,
|
|
so all cases in between the two illustrated above are possible. Single crossovers may have 4,
|
|
5, or 6 signal heads, and double crossovers may have 4, 5, 6, 7, or 8 signal heads. If a
|
|
signal head is entered for <strong>Diverging</strong>, then the <strong>Continuing</strong>
|
|
head signals the straight through track and the <strong>Diverging</strong> head signals the
|
|
crossover track. If no signal head is entered for <strong>Diverging</strong>, the
|
|
<strong>Continuing</strong> signal head reflects the state of whichever track the turnout is
|
|
switched to. In that case, the Simple Signal Logic type for the <strong>Continuing</strong>
|
|
signal head is <strong>On Facing-Point Turnout</strong>.</p>
|
|
|
|
<p>If there was a signal head previously assigned to any position, and you enter a
|
|
<em>different</em> signal head in the same place, the new signal head will replace the
|
|
previous signal head, and the icon of the previous signal head (if there was one) will be
|
|
deleted from the panel. Similarly, if you replace a previously assigned
|
|
<strong>Diverging</strong> signal head with a blank entry (no signal head), the previous
|
|
entry is deleted and the crossover will not have a signal head at that position. <strong>If a
|
|
signal head is changed, you must redo any logic that involves it.</strong></p>
|
|
|
|
<p>Check <strong>Add Signal Icon to Panel</strong> to request that an icon for a signal head
|
|
be placed on the panel at the turnout position indicated. This tool can only place a signal
|
|
icon on a turnout that is almost vertical or almost horizontal. If this is not so, a message
|
|
is printed, and you should place the signal icon manually using the Layout Editor tool bar.
|
|
Regardless, the signal head name is assigned to the specified turnout position.</p>
|
|
|
|
<p>Check <strong>Set up Logic</strong> to request that the tool set up a Simple Signal Logic
|
|
for a signal head. The tool will create the logic and automatically fill in entries from the
|
|
information available. If the tool does not have enough information available to set up the
|
|
logic, a message results, and you will have to return later after more signals have been
|
|
assigned to turnouts and block boundaries on the panel.</p>
|
|
|
|
<h2>Notes</h2>
|
|
|
|
<p>When setting up logic, this tool will follow track within a block until it finds a signal
|
|
at the end of the block away from the turnout being signaled. If your layout contains
|
|
sections that are signaled and sections that are not, to get this tool to set up logic
|
|
correctly, you may have to place a virtual signal (a signal that does not correspond to an
|
|
actual signal on the layout) at the unsignaled end of the block that connects a section of
|
|
track that is signaled with track that is not signaled. If a block ends with an end bumper,
|
|
no signal is required at the end bumper end.</p>
|
|
|
|
<p>If a block has an internal turnout (the turnout, and the track segments at its throat and
|
|
continuing legs are within the block), the program will expect signals at that turnout even
|
|
if it's not at the end of the block. However, at times the user may not want to signal a
|
|
seldom used turnout within a block. When following track through a block, the program will
|
|
skip over unsignaled internal turnouts if <strong>Skip Unsignaled Internal Turnouts</strong>
|
|
is checked in the Layout Editor <strong>Tools</strong> menu. It will always, however, warn
|
|
that it is doing so. <strong>Use this option with caution.</strong> There is no signal
|
|
protecting against a skipped turnout being set incorrectly, so if an unsignaled internal
|
|
turnout is not set correctly, derailed trains could result.</p>
|
|
|
|
<p>This tool sets up three-aspect signaling. With crossovers, the crossover tracks are always
|
|
considered side track, and any mainline track entering the turnout, leaves on the same
|
|
straight as it entered. So, if the crossover is in the crossover state, limited speed (the
|
|
least restrictive is not green, but yellow) is set up (see the four-turnout diagram above).
|
|
If you would prefer not to have limited speed when the turnout is set to crossover, edit the
|
|
Simple Signal Logic by selecting <strong>Edit Logic...</strong> in the turnout's popup menu,
|
|
uncheck <strong>Limited Speed</strong>, and click <strong>Apply</strong>.</p>
|
|
|
|
<p>If you have a special situation at a signal, you may have to do more editing of
|
|
information entered by this tool into the Simple Signal Logic. If you would like four-aspect
|
|
signaling, you can easily manually edit the logic to achieve this. Similarly, by simple hand
|
|
edits of the logic, you can add approach lighting. The Simple Signal Logic dialog can be
|
|
accessed from the popup menu of each signal icon. If your special situation cannot be handled
|
|
by Simple Signal Logic, you should refer to Logix to tailor the signal logic to your
|
|
needs.</p>
|
|
|
|
<p><strong>Please remember to save your Panel after using this tool.</strong>
|
|
</p>
|
|
<!--#include virtual="/help/en/parts/Footer.shtml" -->
|
|
</div>
|
|
<!-- closes #mainContent-->
|
|
</div>
|
|
<!-- closes #mBody-->
|
|
<script src="/js/help.js"></script>
|
|
</body>
|
|
</html>
|