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| Signal lamp failure LJ24: flashing semaphore 09/11/2012 at 19:05 #37371 | |
dmaze
88 posts |
I've just gotten told "Signal lamp failure detected in the Larbert Junction box area", with a corresponding "1S03-1 received an adverse change of aspect at signal LJ25". This is odd enough (LJ24 is near the start of semaphore territory, so there's no "lamp" to fail per se, just as my earlier track circuit failure at Dunblane was right outside the signal box; but I digress), but the failure is especially odd.....v LJ25 v v LJ24 vSo: LJ24 is flashing, between green-over-yellow and dark-over-green. (Larbert signal LN6 is off and showing green on the display.) LJ25 is dutifully repeating its aspect, alternating between red-over-green and green-over-yellow. (I *think* I expect LJ24 to be dark-over-yellow, and LJ25 to be red-over-yellow.) I'm attaching a save file. Post has attachments. Log in to view them. Last edited: 09/11/2012 at 19:11 by dmaze Log in to reply |
| Signal lamp failure LJ24: flashing semaphore 09/11/2012 at 19:53 #37373 | |
Peter Bennet
5360 posts |
As it says in the manual SimSig is not a semaphore platform so there is a bit of license to be taken with some of the effects. However, for lamp failure read broken wire or whatever. What does perplex me is the flashing - the signal is exactly the same as any MAS signal, it's just that I've said for this aspect draw it slightly differently. If it's flashing then I'd think that it is doing so in exactly the same way as coloured lights do when you pull routes. Maybe you pulled a route and it timing out? If that is it then I've since inhibited it from doing that. I'll have a look at the upload shortly. Peter I identify as half man half biscuit - crumbs! Log in to reply |
| Signal lamp failure LJ24: flashing semaphore 09/11/2012 at 20:11 #37375 | |
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dmaze
88 posts |
If I set signal LN7, the down starter from Larbert North towards Plean and Stirling, then the signals at Larbert Junction flash. If I replace LN7 to red then LJ24 and LJ25 settle out at green-over-yellow. This gets me to a more consistent state. When 1S03 arrives at Larbert, LJ24 is dark-over-yellow. Log in to reply |
| Signal lamp failure LJ24: flashing semaphore 10/11/2012 at 10:49 #37381 | |
Stephen Fulcher
2025 posts |
Semaphore signals can fail with the lamp going out. When Banbury was still paraffin lit we used to go to these faults on a regular basis. Not being lit will also in some circumstances be locked to AB acceptance and things, so it is a valid failure mode. Even if it is failed and you "pull the route out" then it will have to time out as normal, which is the most likely cause of the flashing. Log in to reply |
| Signal lamp failure LJ24: flashing semaphore 10/11/2012 at 12:41 #37384 | |
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Peter Bennet
5360 posts |
" said:It's not that, I don't know as yet what it is but it must be flipping between two different standard aspects. I've not followed the AB logic through yet but it's a distinct possibility. Easiest solution will be to make the AB signals non-failable. Peter I identify as half man half biscuit - crumbs! Last edited: 10/11/2012 at 12:41 by Peter Bennet Log in to reply |
| Signal lamp failure LJ24: flashing semaphore 10/11/2012 at 20:17 #37395 | |
jc92
3629 posts |
" said:Fog Falling snow and darkness being the likely limit to acceptance, in good weather the fault is reportable, but normal working can continue. "We don't stop camborne wednesdays" Log in to reply |
| Signal lamp failure LJ24: flashing semaphore 10/11/2012 at 22:05 #37412 | |
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Stephen Fulcher
2025 posts |
Sometimes I have seen the signal being lit being required in the Home Normal Proving Circuit (for non S&T people that means the electronic proving required before a signalman can get the block to show line clear).
Log in to reply The following user said thank you: jc92 |
| Signal lamp failure LJ24: flashing semaphore 13/11/2012 at 21:00 #37473 | |
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Peter Bennet
5360 posts |
I've been through CSCOT and NESCOT and looked at the signals that have a the Y (hidden) aspect and it appears that most were coded not to fail but a couple had slipped through the net. I must have identified this as a problem some time ago. I've not worked out the logic reason for the effect and it's not possible to fail specific aspects to test, so I've not bothered to dig any deeper. Thanks Pater I identify as half man half biscuit - crumbs! Log in to reply |