Serge NOEL
136 lines
8.7 KiB
Plaintext
136 lines
8.7 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 Level Crossing 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 Level Crossing</h1>
|
|
|
|
<h2>Introduction</h2>
|
|
|
|
<p>A level crossing is a special piece of track that models two tracks crossing at grade. A
|
|
level crossing is commonly referred to as a diamond. A level crossing has four connection
|
|
points, named A, B, C, and D, and two tracks, designated 1, for the track connecting points A
|
|
and C, and 2 for the track connecting points B and D. When a level crossing is created, track
|
|
1 (AC) is the horizontal track, and track 2 is the inclined track. The naming convention is
|
|
shown in the diagram below.</p>
|
|
|
|
<p><a href="./images/XingDiagram.gif"><img src="./images/XingDiagram.gif" width="173" height=
|
|
"125" alt="leve crossing"></a>
|
|
</p>
|
|
|
|
<p>This tool will only place turnouts if track 1 (AC) is horizontal or vertical (or mostly
|
|
horizontal or mostly vertical). Because the signal icons have only limited rotation
|
|
capability, the signal icons look best if the two tracks of the level crossing are almost
|
|
perpendicular to each other.</p>
|
|
|
|
<p>Either one or both tracks may be signaled. For the Simple Signal Logic generated by this
|
|
tool to work correctly, the level crossing should serve as a block boundary for each signaled
|
|
track. For example, if track 1 (AC) is signaled, the track segment connected at A should be
|
|
assigned to a different block from that at C. The AC track within the level crossing may be
|
|
assigned to either block. Also, the crossing track should be assigned to one or more blocks
|
|
with occupancy detection, so Simple Signal Logic can be set up to protect against a crossing
|
|
train.</p>
|
|
|
|
<p>For each signal head, check boxes are available for selecting whether an icon is to be
|
|
placed on the panel, and whether control 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 level crossing. <strong>Assigning
|
|
signal heads to level crossings 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 level crossing.</p>
|
|
|
|
<h2>The Set Signals at Level Crossing Dialog</h2>
|
|
|
|
<p>When this tool is selected, a dialog is shown for entry of information that will uniquely
|
|
identify the level crossing, and for entry of the names (system or user) of two or four
|
|
signal heads to be assigned to the level crossing. If entry to the tool was via the level
|
|
crossing's popup menu, the level crossing is identified from the popup menu, and block
|
|
information is automatically entered. If entry to the tool was via the Tools menu, one or two
|
|
block names that uniquely identify the level crossing should be entered. This could be the
|
|
two blocks assigned to track 1 and track 2. Or it could be just one of these blocks, provided
|
|
no other level crossing uses the same block or block combination. It could also be the blocks
|
|
assigned to track segments connected to the level crossing--any combination that allows the
|
|
tool to uniquely identify the level crossing will probably work. If the tool cannot identify
|
|
the level crossing an error message results.</p>
|
|
|
|
<p>If signal heads at this level crossing have been assigned previously, click <strong>Get
|
|
Saved</strong> to retrieve the names of signal heads currently assigned to the level
|
|
crossing.</p>
|
|
|
|
<p>Signal heads must be entered in pairs. If head A is entered, then head C must also be
|
|
entered. Similarly, if head B is entered, then head D must be entered. Note that if two
|
|
entries are blank, the tool assumes that there are no signal heads for that track, and any
|
|
previous assignment of signals to that track will be automatically deleted, along with signal
|
|
icons on the panel at those positions if there are any. Similarly 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. <strong>If a signal
|
|
head is changed, you must redo any logic that involves it.</strong></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 level crossing.</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 level crossing position indicated. This tool can only place a
|
|
signal icon on a level crossing where track 1 (AC) 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
|
|
level crossing 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 and/or blocks
|
|
have been assigned on the panel. If the tool does not have enough information to protect
|
|
against a crossing train, a warning message results, but the logic is still created.</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 level crossing 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.</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. If you have a special situation at a signal, you
|
|
may have to edit the 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>
|