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| Flank locking for routes from sig 3645 03/01/2016 at 17:11 #79517 | |
NCC1701
129 posts |
When a route is set up from signal 3645 (approach on line A) to platform 1 point 5533 is called normal and locked. 5533 is the first point that diverges from line A to platform 4 (reverse) or platform 5 (normal). This prevents a route being set up to depart from platform 4 to line B. Setting a route from platform 4 to line B requires point 5533 reverse so line A to P1 means P4 to line B cannot be set. When a route is set up from signal 3645 to platform 2 point 5533 is called REVERSE and locked, thus allowing a route to be set up from platform 4 to line B.  In light of the latter, the former seems rather more restrictive than is necessary, surely? Post has attachments. Log in to view them. Signalman Exeter West & Llangollen Log in to reply |
| Flank locking for routes from sig 3645 03/01/2016 at 17:26 #79521 | |
Steamer
3922 posts |
The route to platform 1 does not lock any points. However, the points in question are all on the same track circuit. When a track circuit is occupied, any points within it, even if they won't actually be used by the train, are locked. In this case, 2H83 has occupied the track circuit, so you can't move the points until it clears.
"Don't stress/ relax/ let life roll off your backs./ Except for death and paying taxes/ everything in life.../ is only for now." (Avenue Q) Last edited: 03/01/2016 at 17:29 by Steamer Log in to reply The following user said thank you: NCC1701 |
| Flank locking for routes from sig 3645 03/01/2016 at 18:40 #79523 | |
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NCC1701
129 posts |
The moral of that then is set the route out of P4 before any train inbound on line A to P1 passes 3645...
Signalman Exeter West & Llangollen Log in to reply |