Serge NOEL
105 lines
6.6 KiB
Plaintext
105 lines
6.6 KiB
Plaintext
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<title>JMRI: Set Signals at Block Boundary Help</title>
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<meta name="author" content="Dave Duchamp">
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<meta name="keywords" content="JMRI help Layout Editor Tool">
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<h1>Set Signals at Block Boundary</h1>
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<h2>Introduction</h2>
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<p>This tool provides an automated procedure for assigning signals to a block boundary not
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associated with a turnout or a level crossing. This occurs when track segments from different
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blocks join at an anchor point. If requested, this tool will place signal icons on the panel
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at the specified block boundary, and will set up Simple Signal Logic for the specified signal
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heads. Prior to accessing this tool, blocks must be defined for signaled regions of track on
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the panel, and the required signal heads must be in the Signal Head Table. This tool only
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works correctly when track through the anchor point is vertical or horizontal (or mostly
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vertical or horizontal), so design your panel accordingly.</p>
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<p>When this item is selected, a dialog is shown for entry of names of the two blocks whose
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boundary is to be signaled, and for entry of names (system or user) of one or two signal
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heads to be assigned to the block boundary. For each signal head, check boxes are available
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for selecting whether an icon is to be placed on the panel, and whether Simple Signal Logic
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is to be created for the signal head. Regardless of whether icons are placed or logic is
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created, Layout Editor will record that the entered signal heads are assigned to the
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specified block boundary.</p>
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<h2>The Set Signals at Block Boundary Dialog</h2>
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<p>In the top two Block Name fields, enter the names of the two blocks that join at the block
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boundary. If the tool cannot find blocks with those names on the panel, an error message
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results. Also, if the two blocks don't join at an anchor point on the panel, an error message
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results.</p>
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<p>Signal Head names (either system or user) are entered in the next section. At least one
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signal head name should be entered. If signal heads at this block boundary have been entered
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previously, click <strong>Get Saved</strong> to retrieve the signal head names previously
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entered. The upper entry, <strong>East (or South) Bound</strong>, is for the signal head seen
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by an east-bound train (or south-bound train if the track is vertical). "East-bound" refers
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to a train proceeding from left to right <em>on the panel</em> at the block boundary.
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Similarly, "south-bound" refers to a train proceeding from top to bottom <em>on the
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panel</em>. Likewise, the second signal head entry, <strong>West(or North) Bound</strong>, is
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for a signal head seen by a west-bound (or north-bound) train. Because the signal icons only
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look decent for horizontal or vertical track, you should set up your panel so that block
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boundaries occur on track that is almost horizontal or almost vertical.</p>
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<p>Note: If there was a signal head previously assigned to one of the two positions, and you
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enter a <em>different</em> signal head in the same place, the new signal head will replace
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the previous signal head, and the icon of the previous signal head (if there is one) will be
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deleted from the panel.</p>
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<p>Check <strong>Add Signal Icon to Panel</strong> to request that an icon for a signal head
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be placed on the panel at the block boundary. This tool can only place a signal icon on track
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that is almost vertical or almost horizontal. If this is not so, a message is printed, and
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you should place the signal icon manually using the Layout Editor tool bar. Regardless, the
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signal head name is assigned to the block boundary.</p>
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<p>Check <strong>Set up Logic</strong> to request that the tool set up a Simple Signal Logic
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for a signal head. The tool will create the logic and automatically fill in entries from the
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information available. If the tool does not have enough information available to set up the
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logic, a message results, and you will have to return later after more signals have been
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assigned to turnouts and block boundaries on the panel.</p>
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<h2>Notes</h2>
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<p>When setting up logic, this tool will follow track within a block until it finds a signal
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at the end of the block away from the block boundary being signaled. If your layout contains
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sections that are signaled and sections that are not, to get this tool to set up logic
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correctly, you may have to place a virtual signal (a signal that does not correspond to an
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actual signal on the layout) at the unsignaled end of the block that connects a section of
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track that is signaled with track that is not signaled. If a block ends with an end bumper,
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no signal is required at the end bumper end.</p>
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<p>If a block has an internal turnout (the turnout, and the track segments at its throat and
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continuing legs are within the block), the program will expect signals at that turnout even
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if it's not at the end of the block. However, at times the user may not want to signal a
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seldom used turnout within a block. When following track through a block, the program will
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skip over unsignaled internal turnouts if <strong>Skip Unsignaled Internal Turnouts</strong>
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is checked in the Layout Editor <strong>Tools</strong> menu. It will always, however, warn
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that it is doing so. <strong>Use this option with caution.</strong> There is no signal
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protecting against a skipped turnout being set incorrectly, so if an unsignaled internal
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turnout is not set correctly, derailed trains could result.</p>
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<p>This tool sets up three-aspect signaling. If you have a special situation at a signal, or
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would like four aspect signaling or approach lighting you will have to edit the information
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entered by the tool. The Simple Signal Logic dialog can be accessed from the popup menu of
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the signal icon. If your special situation cannot be handled by Simple Signal Logic, you
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should refer to Logix to tailor the signal logic to your needs.</p>
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