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Locked
Re: Files in location not link Help requested Clarification
#operationspro
On Sat, Jan 4, 2020 at 02:45 PM, Sandhaas Robert wrote:
Bob, It would be very useful to the group for you tell us what the solution was. -- Peter Ulvestad JMRI Users Group Moderator - ( ) Tam Valley Group Moderator - ( ) Sprog-DCC Group Moderator - ( ) Edmonton Model Railroad Association - |
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Ken,
I would think that the right way to do this would be to treat each group of dolls and their associated arms for one track as a totally separate mast in Aspect Signal terms. The user would therefore have pre-designated just the arms that will apply to a single track and when taken together will show an Aspect. I hesitate to be absolutist, but I think for our purposes exceptions (like arms co-mounted on a doll for the reverse direction) can be treated as being a completely different mast.? The gantry or bracket in this case is a holder of masts (plural) although it can also be just one of course. It makes a difference visually but not as to signalling. Once you have that distinct set of dolls and arms, you can see the routes being signalled as always left to right in dolls.? ?The signal that is highest designates the "through"/principal route. The others are arranged to make the order of heights designate the relative importance of the diverging routes. It can be that they are all equal!? That would imply a cautious for all routes - still they are left to right.? There is an exception here that very occasionally a single doll has more than one miniature stop arm in a set those are read top to bottom as left to right the highest is the most left, the second right of that, etc (always for a single mast, only for low-speed and goods yard work).? On a individual doll, let's talk about semaphores first - all the arms relate to activities from the track in question on that one route - on a passenger line they will basically have up to three arms, optionally a stencil and optionally a disc-signal (may be for a different route though).
The most important thing to know is that one aim in color light schemes was to reduce the need for route knowledge along the track. With semaphores you have to know if the next signal was to be a stop or a distant to drive the route safely but efficiently.? Otherwise you could see a stop "off" and think you could increase speed until a distant but then hit another stop at "off". In color-lights you should always see a caution aspect (one yellow at least) before you see a danger. That is, any signal you see is giving you some indication of the state of the NEXT signal as well. (In four-color-light schemes, it is the next two signals or even these days three signals).? As color came in, in many cases the same dolls would be in the same arrangements as semaphores at first as the OP indicated. In very early schemes, the Stop would have been a two color red/green, the distant a yellow/green.? Discs and subsidiary's would largely have been retained but perhaps with strong illumination.? Even then, if the next signal has a stop signal, the replacement color-light would have been a three-color light so that the driver would know the state of the next signal, even if that meant a signal that never was above a yellow.? Often three-color lights would have been introduced to replace both the home and the distant semaphore combo. They were also used at isolated distant and isolated homes to increase train density (the aim was to have as an even signal spacing as as possible). Stencils were replaced with theatres (dot matrix light displays). Multiple discs and subsidiary arms would also have been replaced with one illuminated disc/signal and a set of lit stencils in an "eggbox" display (one bulb per indication behind some letters in a box) or completely done away with and replaced with position-lights mounted in the same area (the color-light equivalent of a disc signal) possibly with an associated eggbox or linked to the theatre. Note that stencils, theatres and eggboxes were unsuitable at high-speed and so multiple dolls would be retained unless there were junction indicators aka "feathers" - see below. At the boundary between color and semaphores on the way into a color-light area, the pattern was the last stop arm would be retained and under it was a 3 color light where two of the lights were yellow. The signal would show red (stop) over unlit, green over two yellows, or green over green - this simulated the way the semaphores would have looked and provided some context that a change was occurring. When going from color to semaphore, no special signalling arrangement was needed.? The use of separate dolls largely ceased when the three- or four-color signals got "feathers" on a single head. There could in theory be up to 7 routes indicated by one head (no DI illuminated implies no route divergence) but in practice the combos where two feathers are opposed were rarely used because of the potential for confusion about which of the route was being displayed at night - so 4 routes per head would be the practical maximum. Once that was done, the need for multiple dolls for a single mast was largely eliminated.? Note - Multiple Masts on one bracket or on one gantry persist today - and due to restrictions in height and/or sighting the assorted heads may be closely mounted horizontally, for example, but the route is not communicated by relative position or head height.? =====? So - I think the right way to do this is not to treat a gantry or bracket as one signal but rather a repository on which multiple masts exist (each designated to a track or tracks by a user). Within that knowing about dolls allows the rules for doll heights and left-right positioning will provide a useful approach on route designation and therefore which Aspect can be shown - unless feathers or a theatre/stencil is used in which case it will be explicit, of course. For subsidiaries/position-lights/discs there is often too much to know to automate. They might be simply set if a turnout is thrown (goods yard entry, or reverse crossover) but they could be a calling on light or a reverse or shunt move over a facing crossover that needs a decision based on knowledge of the purpose of the train or trains.? The most that can be done is probably to know which Turnout if any can be tested - and to ensure that the position only illuminates (of the subsidiary or disc only goes to off) if the associated head shows stop and a train is sitting in the Block in front of the Signal.?? Adam |
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Bob has located the bug which was introduced during some cleanup last November 24.
4.19.2 will have the fix in it. I'm not a programmer so have no clue why it affects the web server. Your log file pointed to the consist file as an issue. -- Peter Ulvestad JMRI Users Group Moderator - ( ) Tam Valley Group Moderator - ( ) Sprog-DCC Group Moderator - ( ) Edmonton Model Railroad Association - |
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Peter & Bob
Thanks for the help that seems to have fixed it. Kind of curious as to why the consist file would take down the functions of the webserver (and apparently withrottle server as well...that might be more obvious). If you know and can explain I'd appreciate knowing. Nelson. PS Bob I'm sending you the offending file. |
Peter Ulvestad
Adam Richards
Nelson Allison