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| ACOA/unsafe point movement at Northam Jn 18/02/2012 at 12:00 #29656 | |
dmaze
88 posts |
Southampton V3.2.3. I can trigger an ACOA by being wishy-washy around the bidirectional lines east of Southampton Central station, as follows:
When this last happens, there is still a route for the train towards Southampton from signal 711 to 719, but signal 711 has gone back to red, and the points have swung back as though the overlap at Northam Junction needed to be set for the DF-DM route. Log in to reply |
| Re: ACOA/unsafe point movement at Northam Jn 18/02/2012 at 13:38 #29658 | |
maxand
1637 posts |
Confirmed.      Also happens if setting route along Up Slow. I initially thought it might have been due to approach release locking of 711 but it's probably a bug. Note that the Messages window says ACOA at 707, where the train happened to be when I set a route along Up Fast Last edited: 18/02/2012 at 13:41 by maxand Log in to reply The following user said thank you: Aurora |
| Re: ACOA/unsafe point movement at Northam Jn 18/02/2012 at 14:20 #29659 | |
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J5flyer
48 posts |
Hello, I've had this several times in the past, but I never reported it as I didn't know the steps to re-produce it. Well done for figuring it out! James Log in to reply |
| Re: ACOA/unsafe point movement at Northam Jn 18/02/2012 at 14:28 #29661 | |
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Stephen Fulcher
2084 posts |
" said:Confirmed.It is definitely a bug. In reality, if a signaller were to attempt to set a conflicting route the interlocking just would not set that route. However, there is no conflict here so it appears that the bug lies with the route setting for signal 716. Log in to reply |
| Re: ACOA/unsafe point movement at Northam Jn 18/02/2012 at 14:58 #29663 | |
andyb0607
260 posts |
Bear in mind that Southampton is one of the oldest released sims. A whole host of new improvements have been made to SimSig in general since then. If/when this sim is updated I'm sure that it will be put through a thorough testing before it is released. Log in to reply |
| Re: ACOA/unsafe point movement at Northam Jn 18/02/2012 at 17:07 #29668 | |
Peter Bennet
5402 posts |
Suspect there is some sort of flank protection coded that causes Point 2 to normalise when Point 1 normalises. Peter Post has attachments. Log in to view them. I identify as half man half biscuit - crumbs! Log in to reply |
| Re: ACOA/unsafe point movement at Northam Jn 18/02/2012 at 17:43 #29670 | |
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Stephen Fulcher
2084 posts |
That makes sense, however if that is the case the interlocking should not allow the second route to call as the first one is already set, so there is a bug in there somewhere.
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| Re: ACOA/unsafe point movement at Northam Jn 19/02/2012 at 09:12 #29679 | |
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Firefly
521 posts |
I raised this with Geoff many years back before the forum was born. He said at the time he'd had a nightmare with the swinging overlaps in that area. Log in to reply |
| Re: ACOA/unsafe point movement at Northam Jn 19/02/2012 at 11:18 #29680 | |
GeoffM
6377 posts 
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Clive re-wrote the swinging overlap logic some time ago, but probably after Southampton was last released. Complex overlaps like this area involve recursion before all the routes can agree on which points they want in which position.
SimSig Boss Log in to reply |