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| 4M78 Overlap not dropping out 24/09/2022 at 15:33 #148113 | |
bugsy
1766 posts |
I'm playing the Staffordshire 300220 + Extras timetable and have 4M78 sitting in platform 5 awaiting a crew change. Tt's been there for quite some time, but the overlap hasn't dropped out. Should it have done? I was hoping to divert a couple of trains via the Goods loop to keep them moving but have been unable to do so. ... 04:10 save attached  Post has attachments. Log in to view them. Everything that you make will be useful - providing it's made of chocolate. Log in to reply |
| 4M78 Overlap not dropping out 24/09/2022 at 15:38 #148114 | |
HST125Scorton
1191 posts 
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I think it has to do with 4M78 rear still within the overlap of Signal LS5583. Otherwise normally cancelling that signal which you have done normally drops the overlap.
Aaron (AJRO) | Timetable Writer Log in to reply |
| 4M78 Overlap not dropping out 24/09/2022 at 15:47 #148115 | |
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bugsy
1766 posts |
HST125Scorton in post 148114 said:I think it has to do with 4M78 rear still within the overlap of Signal LS5583. Otherwise normally cancelling that signal which you have done normally drops the overlap.I trust that you mean LS5583. Yes, because I saw that the signal stem was still illuminated and thought that by cancelling the route from there into P5 it would drop the overlap, but it hasn't. So I had to wait for the crew change to finish. Everything that you make will be useful - providing it's made of chocolate. Log in to reply |
| 4M78 Overlap not dropping out 24/09/2022 at 15:55 #148116 | |
Hap
1037 posts |
You are best using the yellow triangle for the reduced over lap into platform 5. That would stop you having this issue.
How to report an issue: www.SimSig.co.uk/Wiki/Show?page=usertrack:reportanissue Log in to reply |
| 4M78 Overlap not dropping out 24/09/2022 at 16:25 #148122 | |
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bugsy
1766 posts |
Hap in post 148116 said:You are best using the yellow triangle for the reduced over lap into platform 5. That would stop you having this issue.Ah, yes. I didn't think of that. :/ Good solution, but unfortunately, it's too late now. Everything that you make will be useful - providing it's made of chocolate. Log in to reply |
| 4M78 Overlap not dropping out 23/10/2022 at 00:34 #148435 | |
Guts
604 posts |
In my humble opinion, the overlap should still die out is the signal in rear is cancelled. Sounds like a bug to me. For example (I hope it's relevant, someone will argue not), last week we had a TCF in the route from Platform 10 at Euston (route-locked after oversetting a route from Platform 9) to WM309. We examined with a train and when the train came to a stand at WM309 to report back; cancelled the route in rear from Platform 10 and the overlap ahead of WM309 died out, which allowed us to run around the route-lock till the S&T and the MOM found Schwarf (metal fillings) on the block joint and cleared the TCF. There had been a concern that the overlap wouldn't die out because of the TCF but it did. Just my humble real-life railway experience. Log in to reply |
| 4M78 Overlap not dropping out 25/10/2022 at 17:33 #148474 | |
Izzy
44 posts |
Guts, your humble opinion is correct. In the real world, the overlap sh/would time out after a specific timer provided for this and only this function (expensive). This was normally only provided at station platforms or where long trains were expected to stop for whatever reason. You wouldn't normally expect to have to set the warner route from rear in this situation. Normally for a route to cancel completely, requires the route in the track section in rear to clear to ensure the route cancels in the direction that the train has passed through (this is especially important on a reversible line). However in certain circumstances (a station platform being one of them), a timer can be provided to bypass a very small part of the route releasing conditions. (I have only talked about relevant conditions here - there are a few others). I suspect the Simsig core code simulates the former but not the latter as i have noticed this in a few places in a few sims - it has never really bothered me that much, because i'd rather have the odd error in Simsig, than not have it at all  (Yes, that is praise for the devs, in case i was too subtle).Well, that's my small contribution done with, just a mini-essay this time :) Happy signalling :) P.S. While i think about it - the other work around from setting the warner route would be to peg all the points and talk past from the signal in rear - then none of the overlap would be used at all. This would be frowned upon in the real world, though. Last edited: 25/10/2022 at 17:39 by Izzy Reason: None given Log in to reply The following user said thank you: Guts |
| 4M78 Overlap not dropping out 25/10/2022 at 17:48 #148475 | |
GeoffM
6376 posts
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Izzy in post 148474 said:I suspect the Simsig core code simulates the former but not the latter as i have noticed this in a few places in a few sims - it has never really bothered me that much, because i'd rather have the odd error in Simsig, than not have it at allThere are several sims where platform subroutes release after a timeout, eg to allow for an opposing call-on into the same platform from the opposite end. If you're aware of any sims where it's missing then please let me know. SimSig Boss Log in to reply |
| 4M78 Overlap not dropping out 25/10/2022 at 18:02 #148476 | |
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Izzy
44 posts |
No current sims, that i can think of Geoff - sorry, i should have made that clearer. I also apologise for any extra work i may have caused you by explaining things.
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