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(http://www.tug.org/tex4ht/)"> +<!-- html --> +<meta name="src" content="interlocking.tex"> +<link rel="stylesheet" type="text/css" href="interlocking.css"> +</head><body +> +<!--l. 18--><p class="noindent" > + + +<!--l. 18--><p class="noindent" ><span +class="ecsx-1728">Interlocking</span> +<span +class="ecsx-1728">System</span> +<span +class="ecsx-1728">Guide</span> +<div class="tabular"> <table id="TBL-1" class="tabular" +cellspacing="0" cellpadding="0" +><colgroup id="TBL-1-1g"><col +id="TBL-1-1"></colgroup><tr + style="vertical-align:baseline;" id="TBL-1-1-"><td style="white-space:nowrap; text-align:left;" id="TBL-1-1-1" +class="td00"></td></tr></table> +</div> +<a + id="x1-2r1"></a> + <!--l. 20--><p class="noindent" ><span +class="ecsx-1200">1</span> <span +class="ecsx-1200">Introduction</span> +<a + id="Q1-1-0"></a> +<!--l. 22--><p class="noindent" >In real-world railways, a so-called interlocking system is a set of railway signals and trackside equipment. Its purpose is to prevent +conflicting train movements which otherwise could result in derailing or colliding trains. If you want more information, just search for +“railway interlocking” on the internet. +<!--l. 28--><p class="noindent" >Real-world interlocking systems perform this task by setting routes. A route is a path along a track that a train can safely pass. To set a +route for a train, the signalman (the operator of a signal box) has to set switches (turnouts) to the correct position and lock them in order +to make a signal for a train show “Proceed”. In newer systems, this is done automatically by the interlocking system. A route can +not be set if switches are locked to a wrong position by another route or if any portion of the route is occupied by a +train. +<!--l. 37--><p class="noindent" >The interlocking system in this Minetest mod tries to follow real-world interlocking systems as far as applicable. It divides tracks into +track sections and implements a route setting mechanism following the same principle. +<!--l. 42--><p class="noindent" >However, for the sake of simplicity of implementation and usage, not all concepts of real-world interlocking have been taken over. +Especially, there is no mechanism for overlap. +<!--l. 46--><p class="noindent" >If you are looking for a place to learn how real-world interlocking systems work, have a look at “SimSig”. By looking at their simulations, +you can obtain experience on how to set up your own interlocking systems in AdvTrains. The SimSig glossary is a good place to look up +unknown terms in this document. +<!--l. 52--><p class="noindent" > +<a + id="x1-3r2"></a> + <!--l. 52--><p class="noindent" ><span +class="ecsx-1200">2</span> <span +class="ecsx-1200">Setting</span> + <span +class="ecsx-1200">up</span> + <span +class="ecsx-1200">track</span> + <span +class="ecsx-1200">sections</span> +<a + id="Q1-1-0"></a> +<!--l. 54--><p class="noindent" >In the real world, a line of track is divided into so-called track sections, or track circuits. Those systems often can not tell +where exactly a train is, but only which track sections it occupies. A route can never be set through an occupied track +section. +<!--l. 59--><p class="noindent" >A track section often covers: + <ul class="itemize1"> + <li class="itemize">A section on a main running line, between two signals + </li> + <li class="itemize">A single turnout + </li> + <li class="itemize">A rail crossing, or a set of turnouts acting as a double/single slip switch + </li> + <li class="itemize">A siding</li></ul> +<!--l. 67--><p class="noindent" >You will find some examples on how to interlock certain patterns later. +<!--l. 69--><p class="noindent" > +<a + id="x1-4r1"></a> + <!--l. 69--><p class="noindent" ><span +class="ecsx-1200">2.1</span> <span +class="ecsx-1200">Track</span> + <span +class="ecsx-1200">Circuit</span> + <span +class="ecsx-1200">Breaks</span> +<a + id="Q1-1-0"></a> +<!--l. 71--><p class="noindent" >In this mod, you will not directly configure the locations of track sections. Instead, you designate the borders of each track section using a +special node, the Track Circuit Break, abbreviated TCB. +<!--l. 75--><p class="noindent" >For example, if you want to create a track section for a piece of a main running line, you set up two TCBs at the ends of this track +circuit. +<!--l. 79--><p class="noindent" >Setting up a TCB works as follows: + <ol class="enumerate1" > + <li + class="enumerate" id="x1-6x1">Place a TCB node somewhere near the place where the circuit break is going to be located. + </li> + <li + class="enumerate" id="x1-8x2">Right-click the TCB node + </li> + <li + class="enumerate" id="x1-10x3">Punch the rail which should act as TCB</li></ol> +<!--l. 86--><p class="noindent" >The result should look like this: +<!--l. 88--><p class="noindent" ><img +src="0_home_moritz_Home_Projekte_Minetest_minetest_m___s_assets_lyx_img_screenshot_20180830_142551.png" alt="PIC" +> +<!--l. 90--><p class="noindent" >Now you have assigned the TCB node to a rail. Right-click the TCB node once again. This will bring up a form which looks as +follows: +<!--l. 93--><p class="noindent" ><img +src="1_home_moritz_Home_Projekte_Minetest_minetest_m____lyx_img_Bildschirmfoto_2018-08-30_14-26-35.png" alt="PIC" +> +<!--l. 95--><p class="noindent" >You see that the form is divided in side A and side B. To designate where each side is, a marker is displayed on the rail. You can always +make this marker show up by punching the TCB node, and remove it by punching the marker. Both sides are shown as “End of +interlocking”. This means that there is no track section set up at this place. +<!--l. 101--><p class="noindent" >You should repeat this procedure once again a few meters away from the first TCB to create a second TCB on the same +track. +<!--l. 104--><p class="noindent" ><img +src="2_home_moritz_Home_Projekte_Minetest_minetest_m____lyx_img_Bildschirmfoto_2018-08-30_14-32-48.png" alt="PIC" +> +<!--l. 106--><p class="noindent" >Once you have both bordering TCBs set up, you can now create the actual track section. To do this: + <ol class="enumerate1" > + <li + class="enumerate" id="x1-12x1">Right-click one of the TCBs + </li> + <li + class="enumerate" id="x1-14x2">Locate the correct side (A or B) to create the track section + </li> + <li + class="enumerate" id="x1-16x3">Click “Create interlocked Track Section” in the formspec on the chosen side.</li></ol> +<!--l. 114--><p class="noindent" >Now, the text on the formspec has changed. It shows something like this: +<!--l. 117--><p class="noindent" ><img +src="3_home_moritz_Home_Projekte_Minetest_minetest_m____lyx_img_Bildschirmfoto_2018-08-30_14-27-25.png" alt="PIC" +> +<!--l. 119--><p class="noindent" >Clicking “Show Track Section” brings up another formspec: +<!--l. 121--><p class="noindent" ><img +src="4_home_moritz_Home_Projekte_Minetest_minetest_m____lyx_img_Bildschirmfoto_2018-08-30_14-28-32.png" alt="PIC" +> +<!--l. 123--><p class="noindent" >On the top, you see a list of all TCBs that border this track section. In your case, there should be two TCBs listed. If there’s only one, +head over to <a +href="#x1-17r2">2.2<!--tex4ht:ref: subsec:Long-track-sections, --></a>. You should now select a name for the track section, to identify it later. +<!--l. 128--><p class="noindent" >The same procedure is applicable when you create a turnout track section, except that you have to set up three or more +TCBs. +<!--l. 131--><p class="noindent" >The AdvTrains interlocking system allows you to add more TCBs after you have created a track section. This works without problems in +most cases. For example, you can easily insert a turnout into an already set-up track section and create another TCB behind it, and +AdvTrains will automatically detect the existing track section. Problems arise only if you try to insert a TCB in-between a section, in +which case both sides of the TCB will end up assigned to the same section. The code currently does not handle this case properly, so try +to avoid this situation by all means. As a last resort, you can always dissolve a faulty track section, as described in the next +chapter. +<!--l. 142--><p class="noindent" > +<a + id="x1-17r2"></a> + <!--l. 142--><p class="noindent" ><span +class="ecsx-1200">2.2</span> <span +class="ecsx-1200">Long</span> + <span +class="ecsx-1200">track</span> + <span +class="ecsx-1200">sections,</span> + <span +class="ecsx-1200">crossings</span> + <span +class="ecsx-1200">and</span> + <span +class="ecsx-1200">other</span> + <span +class="ecsx-1200">edge</span> + <span +class="ecsx-1200">cases</span> +<a + id="Q1-1-0"></a> +<!--l. 144--><p class="noindent" > +<a + id="x1-18r1"></a> + <!--l. 144--><p class="noindent" ><span +class="ecsx-1000">2.2.1</span> <span +class="ecsx-1000">Very</span> + <span +class="ecsx-1000">long</span> + <span +class="ecsx-1000">track</span> + <span +class="ecsx-1000">sections</span> +<a + id="Q1-1-0"></a> +<!--l. 146--><p class="noindent" >If you try to set up a track section that is longer than 1000 nodes, advtrains won’t recognize the TCB at the other end because of a safety +limit in the traverser function, which is supposed to prevent deadlocks. This case has happened when the Track Section overview screen +only shows one TCB in the list. The procedure for this is as follows: + <ol class="enumerate1" > + <li + class="enumerate" id="x1-20x1">Go to the second TCB (the one that wasn’t recognized). It should show “End of Interlocking” on the relevant side. + </li> + <li + class="enumerate" id="x1-22x2">Click “Create interlocked track section”. The section created will be different from the one that is already present. + </li> + <li + class="enumerate" id="x1-24x3">In the track section overview, click “Join into other section” + </li> + <li + class="enumerate" id="x1-26x4">Go back to the first TCB, bring up the Track Section overview screen of the first track section and click “Join with ???”</li></ol> +<!--l. 160--><p class="noindent" >The other, missing TCB should now appear in the list. If you accidentally started such a joining procedure, click the “X” button on the +right. +<!--l. 164--><p class="noindent" > +<a + id="x1-27r2"></a> + <!--l. 164--><p class="noindent" ><span +class="ecsx-1000">2.2.2</span> <span +class="ecsx-1000">Rail</span> + <span +class="ecsx-1000">crosses</span> +<a + id="Q1-1-0"></a> +<!--l. 166--><p class="noindent" >Since rail crosses are created by laying tracks across each other without logical connection, there’s no way for advtrains to know whether +rails cross each other. +<!--l. 170--><p class="noindent" >Rail crossings in interlocking systems are always one single track section, which in most cases has 4 TCBs adjacent. +<!--l. 173--><p class="noindent" ><img +src="5_home_moritz_Home_Projekte_Minetest_minetest_m____lyx_img_Bildschirmfoto_2018-08-30_14-51-25.png" alt="PIC" +> +<!--l. 175--><p class="noindent" >The procedure is quite similar to the one for long sections: First, create two track sections for the branches, and then use the “Join” +function to merge both sections into one. +<!--l. 179--><p class="noindent" > +<a + id="x1-28r3"></a> + <!--l. 179--><p class="noindent" ><span +class="ecsx-1000">2.2.3</span> <span +class="ecsx-1000">Deleting</span> + <span +class="ecsx-1000">and</span> + <span +class="ecsx-1000">re-adding</span> + <span +class="ecsx-1000">single</span> + <span +class="ecsx-1000">TCBs</span> + <span +class="ecsx-1000">to</span> + <span +class="ecsx-1000">a</span> + <span +class="ecsx-1000">section</span> +<a + id="Q1-1-0"></a> +<!--l. 181--><p class="noindent" >In some occasions, for example when you remove a siding or a crossover, it can be necessary to unassign a TCB from a track section. +There are multiple ways to do this: + <ul class="itemize1"> + <li class="itemize">In the TCB form, click the “Remove from section” button + </li> + <li class="itemize">In the track section form, first select the TCB in the list and then click “Unlink selected TCB”</li></ul> +<!--l. 189--><p class="noindent" >The result is that the TCB shows “End of Interlocking” and the section does not list the TCB as an endpoint anymore. +<!--l. 192--><p class="noindent" >The other case is adding a siding or a crossover, in which case one or more TCBs still show “End of Interlocking” although they should be +part of a section: + <ul class="itemize1"> + <li class="itemize">Go to another TCB that is registered in the track section and click “Update near TCBs” + </li> + <li class="itemize">If that did not work, follow the procedure of creating a long track section</li></ul> +<!--l. 202--><p class="noindent" > +<a + id="x1-29r4"></a> + <!--l. 202--><p class="noindent" ><span +class="ecsx-1000">2.2.4</span> <span +class="ecsx-1000">Dissolving</span> + <span +class="ecsx-1000">sections</span> +<a + id="Q1-1-0"></a> +<!--l. 204--><p class="noindent" >If you made a mistake setting up something and you don’t see any other way to fix a misconfigured track section, you can always +delete it using the “Dissolve section” button. This operation removes the track section and sets all TCBs that previously +belonged to the section as “End of Interlocking”. This will always work and lets you start over new with setting up track +sections. +<!--l. 211--><p class="noindent" > +<a + id="x1-30r3"></a> + <!--l. 211--><p class="noindent" ><span +class="ecsx-1200">2.3</span> <span +class="ecsx-1200">Interlocking</span> + <span +class="ecsx-1200">patterns</span> +<a + id="Q1-1-0"></a> +<!--l. 213--><p class="noindent" >This section shows some examples on how you should set up track sections on certain track configurations. +<!--l. 216--><p class="noindent" > +<a + id="x1-31r3"></a> + <!--l. 216--><p class="noindent" ><span +class="ecsx-1200">3</span> <span +class="ecsx-1200">Signals</span> + <span +class="ecsx-1200">and</span> + <span +class="ecsx-1200">routes</span> +<a + id="Q1-1-0"></a> +<!--l. 218--><p class="noindent" >The purpose of signals is to inform trains about whether they can proceed into the next section safely. Making a section of track safe to +pass for a train, turnouts need to be set to the correct position and no other train should be allowed to cross or share parts of the route +with this train. +<!--l. 224--><p class="noindent" > +<a + id="x1-32r1"></a> + <!--l. 224--><p class="noindent" ><span +class="ecsx-1200">3.1</span> <span +class="ecsx-1200">Assigning</span> + <span +class="ecsx-1200">Signals</span> + <span +class="ecsx-1200">to</span> + <span +class="ecsx-1200">TCBs</span> +<a + id="Q1-1-0"></a> +<!--l. 226--><p class="noindent" >Signals in the advtrains interlocking system are positioned - like in real life - at the border of track sections. +<!--l. 229--><p class="noindent" >When you set up a signal, do the following steps: + <ol class="enumerate1" > + <li + class="enumerate" id="x1-34x1">If not already happened, set up a TCB (you don’t need to, but are advised to, configure track sections there) + </li> + <li + class="enumerate" id="x1-36x2">Place the signal a few meters in front of the TCB, so that trains stopping at the signal do never pass the TCB + </li> + <li + class="enumerate" id="x1-38x3">Locate the side of the TCB which points in the direction that trains will proceed past the signal, as shown in the figure + below. + </li> + <li + class="enumerate" id="x1-40x4">Right-click the TCB, and click “Assign a signal” on this side. + </li> + <li + class="enumerate" id="x1-42x5">Punch the signal.</li></ol> +<!--l. 240--><p class="noindent" ><img +src="6_home_moritz_Home_Projekte_Minetest_minetest_mods_advtrains_assets_lyx_img_assign_signal.png" alt="PIC" +> +<!--l. 242--><p class="noindent" >You can assign a signal to each side of a TCB. This is, for example, useful when creating block sections on a bi-directional main running +line. +<!--l. 246--><p class="noindent" > +<a + id="x1-43r2"></a> + <!--l. 246--><p class="noindent" ><span +class="ecsx-1200">3.2</span> <span +class="ecsx-1200">The</span> + <span +class="ecsx-1200">concept</span> + <span +class="ecsx-1200">of</span> + <span +class="ecsx-1200">routes</span> +<a + id="Q1-1-0"></a> +<!--l. 248--><p class="noindent" >A so-called route is a locked path between two signals, which locks all turnouts in the correct position. +<!--l. 251--><p class="noindent" >Example: Imagine a station with 2 platforms on a single track running line. We are looking at signal A. You probably want trains coming +from the right to go into platform 1 or into platform 2, so you need to program 2 routes. +<!--l. 256--><p class="noindent" ><img +src="7_home_moritz_Home_Projekte_Minetest_minetest_mods_advtrains_assets_lyx_img_route_ex1.png" alt="PIC" +> +<!--l. 258--><p class="noindent" >This leads us to the most important aspect of route programming: Routes always start at a signal (A) and end at a signal facing in the +<span +class="ecbx-1000">same direction </span>(D and E), not at an opposite-facing signal (B and C). There are only few exceptions, we’ll cover this +later. +<!--l. 263--><p class="noindent" >When you set a route to make a train proceed on it, the interlocking system ensures that: + <ul class="itemize1"> + <li class="itemize">There are no rail vehicles on the route + </li> + <li class="itemize">All turnouts are set to the correct position and it is impossible to move them + </li> + <li class="itemize">No other routes can be set that would in any way conflict with this route</li></ul> +<!--l. 272--><p class="noindent" >For this to work, you need to specify all track sections the train will pass along, as well as the positions of all turnouts that need to be +locked. Those are not only the turnouts that lay directly on the train’s route, but also some turnouts on adjacent tracks, the so-called +flank protection. +<!--l. 278--><p class="noindent" >The purpose of flank protection is to prevent runaway trains and/or wagons to pass into a route. This is achieved by setting nearby +turnouts to a position that points “away” from the route. Example: +<!--l. 282--><p class="noindent" ><img +src="8_home_moritz_Home_Projekte_Minetest_minetest_mods_advtrains_assets_lyx_img_route_ex2.png" alt="PIC" +> +<!--l. 284--><p class="noindent" >The upper turnout, of course, needs to be locked in straight (normal) position, while the lower one is not relevant for the route itself. But +what if the lower turnout was set to the diverging (reverse) position and the driver of another train approaching signal B fails to see the +red light? This train would crash into the first one. To minimise danger, that other train would need to be routed towards signal +D. +<!--l. 291--><p class="noindent" >There are, of course, situations, where both positions of a turnout would conflict with a route equally. In those situations, there’s nothing +you can do and no flank lock needs to be set. +<!--l. 295--><p class="noindent" > +<a + id="x1-44r3"></a> + <!--l. 295--><p class="noindent" ><span +class="ecsx-1200">3.3</span> <span +class="ecsx-1200">Shunt</span> + <span +class="ecsx-1200">routes</span> +<a + id="Q1-1-0"></a> +<!--l. 297--><p class="noindent" >Operating railways is not all about driving trains around. Coupling, decoupling and moving single engines, wagons or groups of wagons +across a station, called shunting, also plays an important role. +<!--l. 301--><p class="noindent" >Remember what we said about routes: There must be no rail vehicles on the route. So what if you have some goods wagons +ready on a siding, and want to couple an engine to it? You can not set a regular route into the siding, because it is +occupied. +<!--l. 306--><p class="noindent" >The solution is to program a second route into the siding, but with the difference that it already ends at the rear-facing signal of it, so it +doesn’t include the siding section itself: +<!--l. 310--><p class="noindent" ><img +src="9_home_moritz_Home_Projekte_Minetest_minetest_mods_advtrains_assets_lyx_img_route_ex3.png" alt="PIC" +> +<!--l. 312--><p class="noindent" >The Sht2 route then needs to show a shunt aspect, which instructs the driver to proceed slowly and watch out for vehicles on the route. +To show a “free” aspect here would be wrong, because that would mean that the track is free until the next main signal, which it is clearly +not. +<!--l. 320--><p class="noindent" ><span +class="ecti-1000">Note that advtrains_interlocking currently does not allow to set individual aspects for routes, this is a feature still to be implemented</span> +<span +class="ecti-1000">soon.</span> +<!--l. 322--><p class="noindent" >Shunt routes like this are, so far, the only exception to the “Routes should end at a signal facing the same direction” +rule. +<!--l. 325--><p class="noindent" > +<a + id="x1-45r4"></a> + <!--l. 325--><p class="noindent" ><span +class="ecsx-1200">3.4</span> <span +class="ecsx-1200">Route</span> + <span +class="ecsx-1200">Release</span> +<a + id="Q1-1-0"></a> +<!--l. 327--><p class="noindent" >In early real-life interlocking systems, routes either had to be cancelled by the signalman after the train had passed the route, or there was +a single release contact at the end of the route. However, as interlocking systems evolved and the position of trains is now +roughly known by the track sections, portions of the route can be freed as soon as the train has left the corresponding +section. +<!--l. 334--><p class="noindent" >AdvTrains has chosen a modern approach to route releasing. Each turnout lock is associated to a track section belonging to the route’s +path. Once the train leaves this section, all assigned locks are also freed. +<!--l. 338--><p class="noindent" > +<a + id="x1-46r5"></a> + <!--l. 338--><p class="noindent" ><span +class="ecsx-1200">3.5</span> <span +class="ecsx-1200">Programming</span> + <span +class="ecsx-1200">a</span> + <span +class="ecsx-1200">route</span> +<a + id="Q1-1-0"></a> +<!--l. 340--><p class="noindent" >The route programming procedure is quite straightforward if you’ve read the previous sections and understood how routes should be +set. +<!--l. 343--><p class="noindent" >Routes always start at a signal. You must have assigned the signal to a TCB, as described earlier. +<!--l. 346--><p class="noindent" >When you right-click the signal, it no longer changes its aspect. Instead, a formspec pops up, showing you an (empty) list of routes with +the possibility to set them or to create new routes. Click the “Create new route” button to start programming a new +route. +<!--l. 351--><p class="noindent" >The form closes, and an arrow is displayed on the TCB. You are now in “Route Programming” mode, programming the first track section +of the route. Now: + <ul class="itemize1"> + <li class="itemize">Put any turnouts you need to lock in the correct position (e.g. by right-clicking them). This includes flank protection. + </li> + <li class="itemize">Punch them. This makes a marker saying “Route Lock Editing” appear. + </li> + <li class="itemize">If you punch a turnout again, or punch the marker, you can remove the lock again. + </li> + <li class="itemize">When you’ve locked all turnouts in the current section, go to and punch the TCB that is the border to the next track + section the train proceeds into.</li></ul> +<!--l. 364--><p class="noindent" >Once you’ve done this, the lock markers change to “Route Lock”, telling they can’t be changed anymore. Repeat the above procedure until +you have punched the final TCB, at which the route should end. As mentioned before, there should be a signal at this place, +however this is not enforced. Now, run the chat command <span +class="ectt-1000">/at_rp_set <name of route> </span>to complete programming the +route. +<!--l. 371--><p class="noindent" >A few hints: + <ul class="itemize1"> + <li class="itemize">If one turnout should be locked by more than one section, set the lock only in the <span +class="ectt-1000">last </span>of those sections. Locking the same + turnout in multiple sections of a single route results in undefined behavior! + </li> + <li class="itemize">If you accidentally punched a TCB, you can run <span +class="ectt-1000">/at_rp_back </span>to undo this and return to the previous section. Due to a + bug, you have to re-set all locks of this section. + </li> + <li class="itemize">If you want to stop programming the entire route without saving it, run <span +class="ectt-1000">/at_rp_discard</span></li></ul> +<!--l. 384--><p class="noindent" > +<a + id="x1-47r4"></a> + <!--l. 384--><p class="noindent" ><span +class="ecsx-1200">4</span> <span +class="ecsx-1200">Interlocking</span> + <span +class="ecsx-1200">system</span> + <span +class="ecsx-1200">operation</span> +<a + id="Q1-1-0"></a> +<!--l. 386--><p class="noindent" >Setting up the interlocking for a portion of a railway network requires some time, experience and planning, but once done, there’s not +much to do anymore to make trains run on your, now safer, railway. This section covers some useful practices to route trains across your +network. +<!--l. 391--><p class="noindent" >At the moment, routes can only be set by clicking the signal or via LuaATC, except if you use automatic working. It is planned to control +this via the onboard computer and via a “signal box” view based on the currently broken itrainmap. +<!--l. 396--><p class="noindent" > +<a + id="x1-48r1"></a> + <!--l. 396--><p class="noindent" ><span +class="ecsx-1200">4.1</span> <span +class="ecsx-1200">Simple</span> + <span +class="ecsx-1200">route</span> + <span +class="ecsx-1200">setting</span> + <span +class="ecsx-1200">and</span> + <span +class="ecsx-1200">cancelling</span> +<a + id="Q1-1-0"></a> +<!--l. 398--><p class="noindent" >To set a route, simply right-click the signal, select a route and click “set route”. If there are no conflicts, the signal turns green and the +train is allowed to proceed. +<!--l. 402--><p class="noindent" >It may be possible that the route can not be set, because one or more other routes conflict with the current one, or a section is blocked. In +this case, the signal stays red, and the conflicting item is shown in the formspec. As soon as the conflict is resolved (by cancellation +or release of the conflicting route, or the section becoming free), the requested route will be set and the signal turns +green. +<!--l. 409--><p class="noindent" >If a route is either requested or set, it can be cancelled from the signalling formspec. This means that all turnouts and sections are +released, and the signal reverts back to red. This of course only works when the train has not passed the signal yet. There is no +mechanism for Approach Locking. +<!--l. 415--><p class="noindent" > +<a + id="x1-49r2"></a> + <!--l. 415--><p class="noindent" ><span +class="ecsx-1200">4.2</span> <span +class="ecsx-1200">Automatic</span> + <span +class="ecsx-1200">Working</span> +<a + id="Q1-1-0"></a> +<!--l. 417--><p class="noindent" >Block signals on main running lines usually only have a single route to set, the one proceeding along the main line. Their purpose is only +to show whether there are trains in the next section. So, it would be convenient if this only route would set itself again after a train +passed. +<!--l. 423--><p class="noindent" >This is what Automatic Working is for. Set a route, click “Enable Automatic Working”, and as soon as a train passes, the route is +automatically re-set. +<!--l. 427--><p class="noindent" >This function is nearly identical to SimSig automatic signals. It can also be useful on a line with high traffic, when there’s a +low-frequented access to a siding. You’d enable automatic working for the main route and cancel it only when you need a train to go into +the siding. +<!--l. 432--><p class="noindent" > +<a + id="x1-50r5"></a> + <!--l. 432--><p class="noindent" ><span +class="ecsx-1200">5</span> <span +class="ecsx-1200">Final</span> + <span +class="ecsx-1200">notes</span> +<a + id="Q1-1-0"></a> +<!--l. 434--><p class="noindent" >The interlocking system is mainly finished, though there are still some plans and ideas. They include: + <ul class="itemize1"> + <li class="itemize">Setting routes from inside a train (via onboard computer) + </li> + <li class="itemize">Signalbox panels, as revival of itrainmap + </li> + <li class="itemize">Individual signal aspects for routes + </li> + <li class="itemize">Distant signals + </li> + <li class="itemize">On-Train head-up display for oncoming signals (they have something like this in Czech Republic, I forgot how it’s called.)</li></ul> +<!--l. 444--><p class="noindent" >Apart from this, there’s the large oncoming project of a new timetable-based train automation system, but this will take some time to +evolve and is out of the scope of this document. +<!--l. 448--><p class="noindent" >If you have any suggestions, corrections, improvements, criticism or cute kittens and stuff, you can always contact me by various means +(Forum PM, E-Mail (orwell@bleipb.de), Linuxworks server chat a.s.o.). Have fun! +<!--l. 453--><p class="noindent" >- orwell +</body></html> + + + |
