|
Post by tut on Mar 23, 2021 9:20:27 GMT
Morning all,
Just wanted to clear up a few points about the operation of Baker Street SCC. In a sentence: how is it operated?
Obviously you've got the large overview diagram in front showing track circuit occupancy, relative location of automatic signals and aspects of all controlled signals. Then on the desks you've got your 'VDUs' that you can use to have a look at specific areas in more detail and on there you can see train numbers and things, but when it comes to the actual operation of the railway, how's it done? I understand there are local site computers which operate the service in accordance with the timetable when all is running well. I also remember a conversation with harsig at one of the Christmas meets where he told me routes can be set manually using the VDU and the trackball but you can't take full manual control of an area, you just have to dip in and try and pre-empt the computer. Sadly I didn't have my notepad with me so I can't remember very much else of the conversation but I assume the standard principles apply and you can call up the timetable trains are running to and edit a particular trip to, say, get the train to turn short at Moorgate. I would imagine you can also set up auto reversing at some places, maybe King's Cross for example, and so on. But I noticed in a picture www.flickr.com/photos/llangollen_signalman/8438132236/ three visuals with slightly more old-fashioned labels: FCFS (First Come First Served) NOOT (No Out Of Turn) and NORM. That suggests to me either that there are a few other modes available (at least at Baker Street), or that the whole timetable editing thing isn't actually used at Baker Street. Can anyone help clear things up?
|
|
|
Post by Dstock7080 on Mar 23, 2021 9:43:21 GMT
Morning all Just wanted to clear up a few points about the operation of Baker Street SCC. In a sentence: how is it operated? Baker Street now controls very little, indeed only the Wembley Park-Finchley Road area.
|
|
|
Post by tut on Mar 23, 2021 9:49:25 GMT
Morning all Just wanted to clear up a few points about the operation of Baker Street SCC. In a sentence: how is it operated? Baker Street now controls very little, indeed only the Wembley Park-Finchley Road area. And we're all very sad about that Although it must be said, not nearly as sad as when it wiped out so many Met cabins
|
|
Tom
Administrator
Signalfel?
Posts: 4,100
|
Post by Tom on Mar 23, 2021 20:30:23 GMT
When operating the MLCS, you can (if desired) operate each site in manual mode, though it took a bit of effort in the heyday of the SCC.
From memory, if the trip was edited to reverse a train short, no further intervention was required - it simply auto routed at the reversing point.
What you can't do is edit the timetable to alter the order of trains at junctions. Therefore at each junction (or convergence point, in MLCS terminology), a number of modes were available to the signaller, including normal (working according to the timetable), NOOT or FCFS, in a similar way to programme machines.
|
|
|
Post by tut on Mar 23, 2021 20:39:23 GMT
When operating the MLCS, you can (if desired) operate each site in manual mode, though it took a bit of effort in the heyday of the SCC. From memory, if the trip was edited to reverse a train short, no further intervention was required - it simply auto routed at the reversing point. What you can't do is edit the timetable to alter the order of trains at junctions. Therefore at each junction (or convergence point, in MLCS terminology), a number of modes were available to the signaller, including normal (working according to the timetable), NOOT or FCFS, in a similar way to programme machines. Ahhhh now that makes a lot of sense, thank you!
Also my apologies to Harsig I must have misunderstood what he was saying. Presumably he was telling me about operational procedures rather than technical capabilities.
|
|